<?xml version="1.0" encoding="UTF-8" ?>
<feed version="0.3" xmlns="http://purl.org/atom/ns#" xmlns:dc="http://purl.org/dc/elements/1.1/" xml:lang="en">
  <title>Electronic parts, Electronic projects</title>
  <link rel="alternate" type="text/html" href="http://www.zonetronik.net/" />
  <modified>2010-03-10T16:36:01-05:00</modified>
    <id>tag:www.zonetronik.net,2010://1</id>
      <generator url="http://linux.ohwada.jp/">XOOPS WebLinks 0.9</generator>
      <copyright>Copyright (c) 2010, Zonetronik</copyright>
      <author>
    <name>Zonetronik</name>
        <url>http://www.zonetronik.net/</url>
            <email>zonetronik@yahoo.fr</email>
      </author>
      <entry>
    <title>batteries getting hot</title>
    <link rel="alternate" type="text/html" href="http://forum.allaboutcircuits.com/showthread.php?t=35392&amp;goto=newpost" />
    <modified>2010-03-10T13:26:43-05:00</modified>
    <issued>2010-03-10T13:26:43-05:00</issued>
    <id>tag:www.zonetronik.net,2010://1.1</id>
            <summary type="text/plain">helloi build an electronic circuit and i connected it to a switch with a 4 AA battery pack now all good but when i turn off the switch after few min the battry pack is hot as fire..i tried to connect  ...</summary>
        <author>
      <name>ibm123</name>
                </author>
        <dc:subject>All About Circuits Forum</dc:subject>
            <content type="text/html" mode="escaped" xml:lang="en" xml:base="http://forum.allaboutcircuits.com/">
      <![CDATA[
      <div>hello<br />i build an electronic circuit and i connected it to a switch with a 4 AA battery pack <br /><br />now all good but when i turn off the switch after few min the battry pack is hot as fire..<br /><br />i tried to connect a capacitor but it didnt help...<br /><br />any ideas ?</div>
      ]]>
    </content>
      </entry>
    <entry>
    <title>PING))) #28015 with PIC18F2550</title>
    <link rel="alternate" type="text/html" href="http://forum.allaboutcircuits.com/showthread.php?t=35391&amp;goto=newpost" />
    <modified>2010-03-10T12:56:34-05:00</modified>
    <issued>2010-03-10T12:56:34-05:00</issued>
    <id>tag:www.zonetronik.net,2010://1.2</id>
            <summary type="text/plain">Hey Everybody!Im doing a circuit that must measure constantly the Level inside a Tank, i.ve done the circuit and it works! but after a couple of minutes the Sensor and PIC stops working and just turni ...</summary>
        <author>
      <name>Nara Shikamaru</name>
                </author>
        <dc:subject>All About Circuits Forum</dc:subject>
            <content type="text/html" mode="escaped" xml:lang="en" xml:base="http://forum.allaboutcircuits.com/">
      <![CDATA[
      <div>Hey Everybody!<br /><br />Im doing a circuit that must measure constantly the Level inside a Tank, i.ve done the circuit and it works! but after a couple of minutes the Sensor and PIC stops working and just turning it off and on again makes it work for another couple more minutes....i dont know if its the code or what, but how can i fix it!!....<br /><br />the circuit flow sequence is as follows:<br /><br />1) System iniciated<br /><br />2) Start the PING))) #28015<br /><br />3) If the level in Tank is = to low level, Turn on the Pump<br /><br />4) If the level in Tank is &lt; than Low Level, Turn on the pump, turn on the Alarm<br /><br />5) If the Level in tank is = to High Level, Turn off the Pump<br /><br />6) If the level in tank is &gt; of high level, turn off the pump, turn on the Alarm<br /><br />That must be Cyclic!, and constantly show the Level in an LCD....<br /><br /><br />Here i`ll put you the code: <br /><br /><div style="margin:20px; margin-top:5px"><div class="smallfont" style="margin-bottom:2px">Code:</div><hr /><code style="margin:0px" dir="ltr" style="text-align:left">#include &lt;18F2550.h&gt;<br />#device adc=10<br />#fuses HSPLL,NOWDT,NOPROTECT,NOLVP,NODEBUG,USBDIV,PLL5,CPUDIV1,VREGEN<br />#use delay(clock=48000000)<br /><br />&nbsp;#define USB_CON_SENSE_PIN PIN_B2<br /><br />&nbsp;#include &lt;usb_cdc.h&gt;<br />&nbsp;<br />&nbsp;<br />#define LCD_RS PIN_C0 //CONTROL<br />#define LCD_RW PIN_C1<br />#define LCD_E PIN_C2<br /><br />#define LCD_DB4 PIN_A0 //DATOS<br />#define LCD_DB5 PIN_A1<br />#define LCD_DB6 PIN_A2<br />#define LCD_DB7 PIN_A3<br /><br />#include &lt;flex_lcd.h&gt; //LIBRERIA LCD<br /><br />float ticks,distancia,nivel_tanque;<br />void main() {<br />&nbsp;//&nbsp; BYTE i, j, address, value;<br /><br />&nbsp;  setup_adc_ports(NO_ANALOGS);<br /><br />&nbsp;  usb_cdc_init();<br />&nbsp;  usb_init();<br />&nbsp;  lcd_init();&nbsp; <br />&nbsp;  <br />//&nbsp; &nbsp; &nbsp; while(!usb_cdc_connected()) {}<br /><br />&nbsp;  do {<br /><br />&nbsp; &nbsp; &nbsp; {<br />&nbsp; &nbsp; &nbsp;  ticks=0;<br />&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; SET_TRIS_b(0x00);<br />&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; output_low(PIN_B0);<br />&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; output_high(PIN_B0);<br />&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; delay_us(5);<br />&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; output_low(PIN_B0);<br />&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; delay_us(750);<br />&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; SET_TRIS_b(0x01);<br />&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; while(input(PIN_B0))&nbsp; //se genera el pulso de disparo<br />&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;  {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;  // del sensor de distancia<br />&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;  ticks=ticks+1;<br />&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;  delay_us(10);<br />&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;  } <br />&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;  distancia=ticks*300/18500;<br />&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;  nivel_tanque=distancia*2643/100;<br />&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;  //&nbsp; distancia=distancia*255/3000;&nbsp; //la distancia queda en milimetros<br />&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; delay_ms(100);<br />&nbsp; &nbsp; &nbsp; printf(lcd_putc,&quot;\f NIVEL \n #:%f n:%f&quot;, distancia,nivel_tanque);<br />&nbsp; &nbsp; &nbsp; }<br /><br />&nbsp; &nbsp; &nbsp; usb_task();<br />&nbsp; &nbsp; &nbsp; <br />&nbsp; &nbsp; &nbsp; if (usb_enumerated()) <br />&nbsp; &nbsp; &nbsp; {<br />&nbsp; &nbsp; &nbsp; printf(usb_cdc_putc,&quot;\r NIVEL #:%f, nivel:%f&quot;, distancia,nivel_tanque);<br />&nbsp; &nbsp; &nbsp; }<br />&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <br />&nbsp; &nbsp; &nbsp; } while (TRUE);<br />}</code><hr /></div>im using CCS Compiler and PROTEUS for simulation, ill upload the schematic in the ISIS PROTEUS file and a image if you use another simulator, the ultrasonic sensor im simulating it with a Function gen!!<br /><br />I Hope you can help me!....Remember!.....i dont understand why it &quot;hangs up&quot; i call the people at parallax and they told me the Circuit can work continuosly!!.....</div><br /><div style="padding:6px"><fieldset class="fieldset"><legend>Attached Files</legend><table cellpadding="0" cellspacing="3" border="0"><tr><td><img class="inlineimg" src="http://forum.allaboutcircuits.com/images/attach/doc.gif" alt="File Type: doc" width="16" height="16" border="0" style="vertical-align:baseline" /></td><td><a href="http://forum.allaboutcircuits.com/attachment.php?attachmentid=17102&amp;d=1268243725">Circuit.doc</a> (88.5 KB)</td></tr></table></fieldset></div>
      ]]>
    </content>
      </entry>
    <entry>
    <title>Charging Circuit</title>
    <link rel="alternate" type="text/html" href="http://forum.allaboutcircuits.com/showthread.php?t=35390&amp;goto=newpost" />
    <modified>2010-03-10T12:56:14-05:00</modified>
    <issued>2010-03-10T12:56:14-05:00</issued>
    <id>tag:www.zonetronik.net,2010://1.3</id>
            <summary type="text/plain">I am building a project that required that a 12v battery be used to power a motor.  The problem is that I want to apply 12v to move an object but want the object to return to original position upon re ...</summary>
        <author>
      <name>DeanF</name>
                </author>
        <dc:subject>All About Circuits Forum</dc:subject>
            <content type="text/html" mode="escaped" xml:lang="en" xml:base="http://forum.allaboutcircuits.com/">
      <![CDATA[
      <div>I am building a project that required that a 12v battery be used to power a motor.  The problem is that I want to apply 12v to move an object but want the object to return to original position upon removing the power.  The motor is a electric window motor for a car which I assume draws about 2-3 amps.  I can find that out for sure,,, but you get the idea, I'm sure.  Thanks.</div>
      ]]>
    </content>
      </entry>
    <entry>
    <title>Connection of: AND logic gate, NE555, Microcontroller</title>
    <link rel="alternate" type="text/html" href="http://forum.allaboutcircuits.com/showthread.php?t=35389&amp;goto=newpost" />
    <modified>2010-03-10T12:20:17-05:00</modified>
    <issued>2010-03-10T12:20:17-05:00</issued>
    <id>tag:www.zonetronik.net,2010://1.4</id>
            <summary type="text/plain">I want to make an AND logic gate that takes as the two inputs:1) Impulsions from a microcontroller2) High frequency signal from a NE555How do I go about doing it?I would like to know in what form the  ...</summary>
        <author>
      <name>Iad25889</name>
                </author>
        <dc:subject>All About Circuits Forum</dc:subject>
            <content type="text/html" mode="escaped" xml:lang="en" xml:base="http://forum.allaboutcircuits.com/">
      <![CDATA[
      <div>I want to make an AND logic gate that takes as the two inputs:<br />1) Impulsions from a microcontroller<br />2) High frequency signal from a NE555<br /><br />How do I go about doing it?<br /><br />I would like to know in what form the microcontroller gives impulsions to the logic gate (which I plan to make with either 2 transistors or 2 diods; which is better?).<br /><br />I would also like to know in what form the NE555 gives its high frequency signal to the logic gate.<br /><br />I think that would help me connect these components together.<br /><br />What comes after these components is a sort of voltage amplifier (which I plan to make with 1 transistor, 3 resistors and 1 capacitor; is that a good idea?) and after this voltage amplifier is a transformer to isolate the microcontroller from the triac that comes after the transformer.<br /><br />Finally, the project is actually to regulate the power given to a heating element and the triac is the component that regulates the power that the heating element receives.<br /><br />Thank you in advance for helping me answer these questions.</div>
      ]]>
    </content>
      </entry>
    <entry>
    <title>Multimeter question - 3.5mm jacks</title>
    <link rel="alternate" type="text/html" href="http://forum.allaboutcircuits.com/showthread.php?t=35388&amp;goto=newpost" />
    <modified>2010-03-10T12:11:42-05:00</modified>
    <issued>2010-03-10T12:11:42-05:00</issued>
    <id>tag:www.zonetronik.net,2010://1.5</id>
            <summary type="text/plain">I&apos;ve never owned or used a multimeter before and was wondering if I need to buy an adapter of sorts to measure voltage coming from a 3.5mm (1/8&amp;quot;) patch cable. The voltages are coming from my modu ...</summary>
        <author>
      <name>phase ghost</name>
                </author>
        <dc:subject>All About Circuits Forum</dc:subject>
            <content type="text/html" mode="escaped" xml:lang="en" xml:base="http://forum.allaboutcircuits.com/">
      <![CDATA[
      <div>I've never owned or used a multimeter before and was wondering if I need to buy an adapter of sorts to measure voltage coming from a 3.5mm (1/8&quot;) patch cable. The voltages are coming from my modular synthesizer.<br /><br />Thanks and apologies for the novice question.</div>
      ]]>
    </content>
      </entry>
    <entry>
    <title>AND logic gate is better: with 2 transistors or with 2 diodes?</title>
    <link rel="alternate" type="text/html" href="http://forum.allaboutcircuits.com/showthread.php?t=35387&amp;goto=newpost" />
    <modified>2010-03-10T12:03:50-05:00</modified>
    <issued>2010-03-10T12:03:50-05:00</issued>
    <id>tag:www.zonetronik.net,2010://1.6</id>
            <summary type="text/plain">I want to make an AND logic gate that takes as the two inputs:1) Impulsions from a microcontroller</summary>
        <author>
      <name>Iad25889</name>
                </author>
        <dc:subject>All About Circuits Forum</dc:subject>
            <content type="text/html" mode="escaped" xml:lang="en" xml:base="http://forum.allaboutcircuits.com/">
      <![CDATA[
      <div>I want to make an AND logic gate that takes as the two inputs:<br />1) Impulsions from a microcontroller</div>
      ]]>
    </content>
      </entry>
    <entry>
    <title>Sensor failures</title>
    <link rel="alternate" type="text/html" href="http://forum.allaboutcircuits.com/showthread.php?t=35386&amp;goto=newpost" />
    <modified>2010-03-10T11:29:58-05:00</modified>
    <issued>2010-03-10T11:29:58-05:00</issued>
    <id>tag:www.zonetronik.net,2010://1.7</id>
            <summary type="text/plain">Dear all,,,What are the failure causes of the following:1- Voltage sensors.2- Current sensors of current transducershow can the fault be detected in both types?.</summary>
        <author>
      <name>khalid4145</name>
                </author>
        <dc:subject>All About Circuits Forum</dc:subject>
            <content type="text/html" mode="escaped" xml:lang="en" xml:base="http://forum.allaboutcircuits.com/">
      <![CDATA[
      <div>Dear all,,,<br /><br />What are the failure causes of the following:<br /><br />1- Voltage sensors.<br /><br />2- Current sensors of current transducers<br /><br />how can the fault be detected in both types?.</div>
      ]]>
    </content>
      </entry>
    <entry>
    <title>KVL: Mesh Current Method</title>
    <link rel="alternate" type="text/html" href="http://forum.allaboutcircuits.com/showthread.php?t=35385&amp;goto=newpost" />
    <modified>2010-03-10T11:22:39-05:00</modified>
    <issued>2010-03-10T11:22:39-05:00</issued>
    <id>tag:www.zonetronik.net,2010://1.8</id>
            <summary type="text/plain">Im using the Mesh Current Method to find the voltage across R2 (5k).  I dont know how to write the equation for Loop 3.I tried removing Loop 3 from the circuit then calculating the currents for loop 1 ...</summary>
        <author>
      <name>Steve1992</name>
                </author>
        <dc:subject>All About Circuits Forum</dc:subject>
            <content type="text/html" mode="escaped" xml:lang="en" xml:base="http://forum.allaboutcircuits.com/">
      <![CDATA[
      <div><font face="Arial, sans-serif"><font size="2">Im using the Mesh Current Method to find the voltage across R2 (5k).  I dont know how to write the equation for Loop 3.</font></font><br /><br /><br /><font face="Arial, sans-serif"><font size="2">I tried removing Loop 3 from the circuit then calculating the currents for loop 1 and loop 2, then putting back loop 3 (6 mA) back into the circuit - that didnt work.</font></font></div><br /><div style="padding:6px"><fieldset class="fieldset"><legend>Attached Images</legend><table cellpadding="0" cellspacing="3" border="0"><tr><td><img class="inlineimg" src="http://forum.allaboutcircuits.com/images/attach/jpg.gif" alt="File Type: jpg" width="16" height="16" border="0" style="vertical-align:baseline" /></td><td><a href="http://forum.allaboutcircuits.com/attachment.php?attachmentid=17099&amp;d=1268238035" target="_blank">KVL Mesh.jpg</a> (191.6 KB)</td></tr></table></fieldset></div>
      ]]>
    </content>
      </entry>
    <entry>
    <title>K-map simplification</title>
    <link rel="alternate" type="text/html" href="http://forum.allaboutcircuits.com/showthread.php?t=35384&amp;goto=newpost" />
    <modified>2010-03-10T11:14:03-05:00</modified>
    <issued>2010-03-10T11:14:03-05:00</issued>
    <id>tag:www.zonetronik.net,2010://1.9</id>
            <summary type="text/plain">Suggest me how can i solve the following K-mapf(A,B,C)= &amp;#931;m(0,1,3,A,5)</summary>
        <author>
      <name>Unregistered</name>
                </author>
        <dc:subject>All About Circuits Forum</dc:subject>
            <content type="text/html" mode="escaped" xml:lang="en" xml:base="http://forum.allaboutcircuits.com/">
      <![CDATA[
      <div>Suggest me how can i solve the following K-map<br />f(A,B,C)= &#931;m(0,1,3,A,5)</div>
      ]]>
    </content>
      </entry>
    <entry>
    <title>Power Supply for RF Modulator</title>
    <link rel="alternate" type="text/html" href="http://forum.allaboutcircuits.com/showthread.php?t=35383&amp;goto=newpost" />
    <modified>2010-03-10T11:12:52-05:00</modified>
    <issued>2010-03-10T11:12:52-05:00</issued>
    <id>tag:www.zonetronik.net,2010://1.10</id>
            <summary type="text/plain">Hi I need a power supply for my project. I intend to take the plug off the the phone charger but I have no multimeter to know which line is positive. One of the two wires have a white stripe running o ...</summary>
        <author>
      <name>CircuitSurfer</name>
                </author>
        <dc:subject>All About Circuits Forum</dc:subject>
            <content type="text/html" mode="escaped" xml:lang="en" xml:base="http://forum.allaboutcircuits.com/">
      <![CDATA[
      <div>Hi I need a power supply for my project. I intend to take the plug off the the phone charger but I have no multimeter to know which line is positive. One of the two wires have a white stripe running on top of it. Would that be the positive?</div>
      ]]>
    </content>
      </entry>
    <entry>
    <title>Logic Design using Multiplexers.</title>
    <link rel="alternate" type="text/html" href="http://forum.allaboutcircuits.com/showthread.php?t=35382&amp;goto=newpost" />
    <modified>2010-03-10T10:57:17-05:00</modified>
    <issued>2010-03-10T10:57:17-05:00</issued>
    <id>tag:www.zonetronik.net,2010://1.11</id>
            <summary type="text/plain">Hi Forum.  I have the following homework question. Implement the function:f(A,B,C,D,E) = sigma (0,2,4,6,10,12,13,16,20,26,28,31)   with dont care 8,18,27  using two 8to1 line multiplexers and one 2to1 ...</summary>
        <author>
      <name>Fraser_Integration</name>
                </author>
        <dc:subject>All About Circuits Forum</dc:subject>
            <content type="text/html" mode="escaped" xml:lang="en" xml:base="http://forum.allaboutcircuits.com/">
      <![CDATA[
      <div>Hi Forum.  <br /><br />I have the following homework question. Implement the function:<br /><br />f(A,B,C,D,E) = sigma (0,2,4,6,10,12,13,16,20,26,28,31)   with dont care 8,18,27  using two 8to1 line multiplexers and one 2to1line multiplexer using B as the data variable. I did this fine, see the attached  .<br /><br />It then asks &quot;how might you take advantage of the don't care conditions to solve this function using four 4to1line multiplexers&quot;<br /><br />This has got me baffled. I don't really know where to start, any ideas?</div><br /><div style="padding:6px"><fieldset class="fieldset"><legend>Attached Images</legend><table cellpadding="0" cellspacing="3" border="0"><tr><td><img class="inlineimg" src="http://forum.allaboutcircuits.com/images/attach/jpg.gif" alt="File Type: jpg" width="16" height="16" border="0" style="vertical-align:baseline" /></td><td><a href="http://forum.allaboutcircuits.com/attachment.php?attachmentid=17098&amp;d=1268236633" target="_blank">multiplex.jpg</a> (94.3 KB)</td></tr></table></fieldset></div>
      ]]>
    </content>
      </entry>
    <entry>
    <title>how to choose a suitable mosfet?</title>
    <link rel="alternate" type="text/html" href="http://forum.allaboutcircuits.com/showthread.php?t=35381&amp;goto=newpost" />
    <modified>2010-03-10T10:54:25-05:00</modified>
    <issued>2010-03-10T10:54:25-05:00</issued>
    <id>tag:www.zonetronik.net,2010://1.12</id>
            <summary type="text/plain">i am driving a motor using h-bridge with mosfet, the motor suports 3A(max) and voltage rating 180V. if i am choosing a mosfet with 10A and 200V Vds, can the mosfet sustain the current ?</summary>
        <author>
      <name>ngkyew</name>
                </author>
        <dc:subject>All About Circuits Forum</dc:subject>
            <content type="text/html" mode="escaped" xml:lang="en" xml:base="http://forum.allaboutcircuits.com/">
      <![CDATA[
      <div>i am driving a motor using h-bridge with mosfet, the motor suports 3A(max) and voltage rating 180V. if i am choosing a mosfet with 10A and 200V Vds, can the mosfet sustain the current ?</div>
      ]]>
    </content>
      </entry>
    <entry>
    <title>Battery Monitoring</title>
    <link rel="alternate" type="text/html" href="http://forum.allaboutcircuits.com/showthread.php?t=35380&amp;goto=newpost" />
    <modified>2010-03-10T10:47:10-05:00</modified>
    <issued>2010-03-10T10:47:10-05:00</issued>
    <id>tag:www.zonetronik.net,2010://1.13</id>
            <summary type="text/plain">Hi,I have an op-amp set up as depicted in the attachment file.  I have put a physical wire to VCCSENSE and varied the input voltage with a DC power supply to determine the proportionality of the readi ...</summary>
        <author>
      <name>lorhve</name>
                </author>
        <dc:subject>All About Circuits Forum</dc:subject>
            <content type="text/html" mode="escaped" xml:lang="en" xml:base="http://forum.allaboutcircuits.com/">
      <![CDATA[
      <div>Hi,<br /><br />I have an op-amp set up as depicted in the attachment file.  I have put a physical wire to VCCSENSE and varied the input voltage with a DC power supply to determine the proportionality of the reading.  And, I have observed something unexpected.  First of all, the reading seems to be way off from the 'theoretical' value, which is the obvious straight line in the graph.  The other two lines are readings from two different circuit boards.   Also, there is a sudden slope near the 15V reading.  Does anyone have an idea of why the reading is so different from the theoretical value only except at 11.5V and there is a slope change at a higher voltage level?<br /><br />Thanks,<br />Lorhve</div><br /><div style="padding:6px"><fieldset class="fieldset"><legend>Attached Images</legend><table cellpadding="0" cellspacing="3" border="0"><tr><td><img class="inlineimg" src="http://forum.allaboutcircuits.com/images/attach/png.gif" alt="File Type: png" width="16" height="16" border="0" style="vertical-align:baseline" /></td><td><a href="http://forum.allaboutcircuits.com/attachment.php?attachmentid=17096&amp;d=1268236020" target="_blank">Picture 2.png</a> (24.1 KB)</td></tr><tr><td><img class="inlineimg" src="http://forum.allaboutcircuits.com/images/attach/png.gif" alt="File Type: png" width="16" height="16" border="0" style="vertical-align:baseline" /></td><td><a href="http://forum.allaboutcircuits.com/attachment.php?attachmentid=17097&amp;d=1268236020" target="_blank">Picture 1.png</a> (69.7 KB)</td></tr></table></fieldset></div>
      ]]>
    </content>
      </entry>
    <entry>
    <title>Lempel-Ziv Question</title>
    <link rel="alternate" type="text/html" href="http://forum.allaboutcircuits.com/showthread.php?t=35379&amp;goto=newpost" />
    <modified>2010-03-10T09:56:02-05:00</modified>
    <issued>2010-03-10T09:56:02-05:00</issued>
    <id>tag:www.zonetronik.net,2010://1.14</id>
            <summary type="text/plain">HiCan someone please explain to me the solution to the following lempel-ziv problem http://img72.yfrog.com/img72/2932/ziv1.png.  Please note, the link has the problem along with the solution, however  ...</summary>
        <author>
      <name>darkman12</name>
                </author>
        <dc:subject>All About Circuits Forum</dc:subject>
            <content type="text/html" mode="escaped" xml:lang="en" xml:base="http://forum.allaboutcircuits.com/">
      <![CDATA[
      <div>Hi<br /><br />Can someone please explain to me the solution to the following lempel-ziv problem <a href="http://img72.yfrog.com/img72/2932/ziv1.png" target="_blank">http://img72.yfrog.com/img72/2932/ziv1.png</a>.  Please note, the link has the problem along with the solution, however I can't seem to grasp how we get the values on row 5 (row with a ? pointing to it).<br /><br />This link should be a little clearer: <a href="http://img63.yfrog.com/i/ziv.jpg/" target="_blank">http://img63.yfrog.com/i/ziv.jpg/</a><br /><br />Thanks in advance<br /><br />darkman12</div>
      ]]>
    </content>
      </entry>
    <entry>
    <title>Wireless MCU near overhead power lines</title>
    <link rel="alternate" type="text/html" href="http://forum.allaboutcircuits.com/showthread.php?t=35378&amp;goto=newpost" />
    <modified>2010-03-10T08:37:09-05:00</modified>
    <issued>2010-03-10T08:37:09-05:00</issued>
    <id>tag:www.zonetronik.net,2010://1.15</id>
            <summary type="text/plain">Hello,i&apos;d like to ask your opinions on this project that i&apos;m trying to do. I want to use wireless MCU like this and interface it with a serial output camera. The intention is to link two of these to d ...</summary>
        <author>
      <name>redblaque</name>
                </author>
        <dc:subject>All About Circuits Forum</dc:subject>
            <content type="text/html" mode="escaped" xml:lang="en" xml:base="http://forum.allaboutcircuits.com/">
      <![CDATA[
      <div>Hello,<br /><br />i'd like to ask your opinions on this project that i'm trying to do. I want to use wireless MCU like <a href="http://www.silabs.com/products/wireless/wirelessmcu/Pages/Si1000.aspx" target="_blank">this</a> and interface it with a serial output camera. The intention is to link two of these to demo a wireless sensor network. <br /><br />The operating frequency of these MCUs that are available to me is 916MHz. I'm not good at radios. Do you think it is safe to use it at outdoor conditions and near overhead power lines that are 50/60Hz? Would there be any interference and such? <br /><br />Sorry if i've posted at the wrong section.. <br /></div>
      ]]>
    </content>
      </entry>
    <entry>
    <title>Bell 3710 PA, tube amp project</title>
    <link rel="alternate" type="text/html" href="http://forum.allaboutcircuits.com/showthread.php?t=35363&amp;goto=newpost" />
    <modified>2010-03-10T00:45:22-05:00</modified>
    <issued>2010-03-10T00:45:22-05:00</issued>
    <id>tag:www.zonetronik.net,2010://1.16</id>
            <summary type="text/plain">I realize there are other forums that deal with instrument tube amps and the like, but the folks at this site have been so helpful in the past,  I thought I&apos;d share this new project with you all.  To  ...</summary>
        <author>
      <name>wrenchbender</name>
                </author>
        <dc:subject>All About Circuits Forum</dc:subject>
            <content type="text/html" mode="escaped" xml:lang="en" xml:base="http://forum.allaboutcircuits.com/">
      <![CDATA[
      <div>I realize there are other forums that deal with instrument tube amps and the like, but the folks at this site have been so helpful in the past,  I thought I'd share this new project with you all.  To date, I've replaced all the capacitors, and several resistors, and the amp now functions but am missing something in the tone.  I'm interested in playing a strat or tele guitar through it, maybe some blues harp.    What can I do with this schematic to get more of a tweed deluxe type of tone?  Also, I measured .038 amps on one 6v6, and .040 amps on the other with about 270 volts.  Comes out to about 10.5 watts. Does that sound ok?<br />thanks.<br /><a href="http://www.theused.com/manuals/bell/bell_sound_3710.pdf" target="_blank">http://www.theused.com/manuals/bell/bell_sound_3710.pdf</a></div>
      ]]>
    </content>
      </entry>
    <entry>
    <title>Advanced Battery Technologies</title>
    <link rel="alternate" type="text/html" href="http://forum.allaboutcircuits.com/showthread.php?t=35362&amp;goto=newpost" />
    <modified>2010-03-10T00:40:23-05:00</modified>
    <issued>2010-03-10T00:40:23-05:00</issued>
    <id>tag:www.zonetronik.net,2010://1.17</id>
            <summary type="text/plain">I&apos;ve recently been doing some work with lead-acid batteries. As most of you know, these things are nuts in terms of the amount of power they can deliver - effectively they are a power supply that can  ...</summary>
        <author>
      <name>stube40</name>
                </author>
        <dc:subject>All About Circuits Forum</dc:subject>
            <content type="text/html" mode="escaped" xml:lang="en" xml:base="http://forum.allaboutcircuits.com/">
      <![CDATA[
      <div>I've recently been doing some work with lead-acid batteries. As most of you know, these things are nuts in terms of the amount of power they can deliver - effectively they are a power supply that can deliver hundreds of amps in a small space of time. The upper limit is only defined by the limits of the chemical equation going on inside, coupled with the melting point of the matterials used to make the battery.<br /><br />I'm wondering if there's any existing or new battery technologies that have an inherently more stable chemical equation that results in some sort of integral virtual current limiting or current control?<br /><br />It's been a while since my high-school chemistry lessons, but maybe there are some chemical equations that cannot be speeded up? The assumption here is that the speed at which the chemical equation takes place is proportional to the power delivery.<br /><br />Can anyone can shed any light on this?</div>
      ]]>
    </content>
      </entry>
    <entry>
    <title>Using the results from a difference equation in digital control</title>
    <link rel="alternate" type="text/html" href="http://forum.allaboutcircuits.com/showthread.php?t=35361&amp;goto=newpost" />
    <modified>2010-03-10T00:39:43-05:00</modified>
    <issued>2010-03-10T00:39:43-05:00</issued>
    <id>tag:www.zonetronik.net,2010://1.18</id>
            <summary type="text/plain">Hi guys,I&apos;m working on a control system for a DC-DC converter, and I&apos;m stuck on a certain aspect. I have the transfer function in difference equation format for my DC-DC convert, but I&apos;m unsure how to ...</summary>
        <author>
      <name>Obanion</name>
                </author>
        <dc:subject>All About Circuits Forum</dc:subject>
            <content type="text/html" mode="escaped" xml:lang="en" xml:base="http://forum.allaboutcircuits.com/">
      <![CDATA[
      <div>Hi guys,<br /><br />I'm working on a control system for a DC-DC converter, and I'm stuck on a certain aspect. <br /><br />I have the transfer function in difference equation format for my DC-DC convert, but I'm unsure how to program it. I'm using an FPGA with Verilog, but in terms of conceptualization, I believe it applied to any programming language.<br /><br />For instance, let's say my difference equation is:<br /><br />D(n)  = 5.45*I(n) - 123.4*I(n-1) + 1.3*D(n-1) - 0.5*D(n-2)<br /><br />Where D(n) is the duty cycle at instant n and I(n) is the current at instant n.<br /><br />I guess my question is how do I know what values to use for this input? My maximum current is going to be 1 A. I'm using an 11 bit ADC, so that translates to 11111111111 (for 1 A) in binary.  Do I need to scale this value for the difference equation, and if so by what amount? <br /><br />My duty cycle routine accepts a number from 0-2048, where 1024 would be 50%, 2048 would be 100% and so on. This is easily modifiable.<br /><br />For the duty cycle, is it the same process? In reality, the duty cycle can be from 1-0, and never above. Let's say I assume that my max current value is scaled to 1, and my duty cycle is scaled to 1 also. Feeding my equation, I just may get a number greater than 1. I don't know what the output of the difference equation's duty cycle actually means.<br /><br />This is where I'm very unsure what to make of it and I apologize if I'm not making any sense. I'm not sure if this concept is one that has been already addressed in textbooks or such. I'd appreciate any information on this subject. Please let me know if I'm not being clear and I'll try my best to explain it more clearly.<br /><br /><br />Thanks,<br /><br />Obanion</div>
      ]]>
    </content>
      </entry>
    <entry>
    <title>VHDL shift register</title>
    <link rel="alternate" type="text/html" href="http://forum.allaboutcircuits.com/showthread.php?t=35360&amp;goto=newpost" />
    <modified>2010-03-10T00:22:23-05:00</modified>
    <issued>2010-03-10T00:22:23-05:00</issued>
    <id>tag:www.zonetronik.net,2010://1.19</id>
            <summary type="text/plain">Hi everyone,I am in search of VHDL code for the shift register. If you have any one, please let me know.Thank you.</summary>
        <author>
      <name>yashowardhan</name>
                </author>
        <dc:subject>All About Circuits Forum</dc:subject>
            <content type="text/html" mode="escaped" xml:lang="en" xml:base="http://forum.allaboutcircuits.com/">
      <![CDATA[
      <div>Hi everyone,<br />I am in search of VHDL code for the shift register. If you have any one, please let me know.<br /><br />Thank you.</div>
      ]]>
    </content>
      </entry>
    <entry>
    <title>please help me troubleshooting my project</title>
    <link rel="alternate" type="text/html" href="http://forum.allaboutcircuits.com/showthread.php?t=35359&amp;goto=newpost" />
    <modified>2010-03-09T22:51:22-05:00</modified>
    <issued>2010-03-09T22:51:22-05:00</issued>
    <id>tag:www.zonetronik.net,2010://1.20</id>
            <summary type="text/plain">hello everyone...im new in this forum and really need your helps..sorry if my English does not very well...i have problem with my circuit..im successfully get the desired output waveform by using the  ...</summary>
        <author>
      <name>nasz</name>
                </author>
        <dc:subject>All About Circuits Forum</dc:subject>
            <content type="text/html" mode="escaped" xml:lang="en" xml:base="http://forum.allaboutcircuits.com/">
      <![CDATA[
      <div>hello everyone...im new in this forum and really need your helps..sorry if my English does not very well...<br /><br />i have problem with my circuit..im successfully get the desired output waveform by using the Multisim but unfortunately, when i construct in on the breadboard, there are no any output waveform..owh, im doing PPM and PWM laboratory kits using LM555..can u guys help me figure out whats' the problem are?..how to troubleshooting the circuit exactly?..<br /><br /><br /><br />im really need the help!!..thanks for your attention and helps...</div><br /><div style="padding:6px"><fieldset class="fieldset"><legend>Attached Images</legend><table cellpadding="0" cellspacing="3" border="0"><tr><td><img class="inlineimg" src="http://forum.allaboutcircuits.com/images/attach/jpg.gif" alt="File Type: jpg" width="16" height="16" border="0" style="vertical-align:baseline" /></td><td><a href="http://forum.allaboutcircuits.com/attachment.php?attachmentid=17090&amp;d=1268193014" target="_blank">Pulse Width Modulation.jpg</a> (57.8 KB)</td></tr><tr><td><img class="inlineimg" src="http://forum.allaboutcircuits.com/images/attach/jpg.gif" alt="File Type: jpg" width="16" height="16" border="0" style="vertical-align:baseline" /></td><td><a href="http://forum.allaboutcircuits.com/attachment.php?attachmentid=17091&amp;d=1268193014" target="_blank">Pulse Position Modulation.jpg</a> (38.8 KB)</td></tr></table></fieldset></div>
      ]]>
    </content>
      </entry>
  </feed>