Search found 25 matches

by Sparky Williams
Fri Jun 11, 2004 7:29 pm
Forum: General Discussion
Topic: Oscilloscope question
Replies: 8
Views: 2050

Re: Oscilloscope question

To Everyone:<p>I want to thank everyone for their very informative responses to my question.
by Sparky Williams
Wed Jun 09, 2004 11:47 pm
Forum: General Discussion
Topic: Oscilloscope question
Replies: 8
Views: 2050

Re: Oscilloscope question

Dear Edd:<p>You have a good memory! It's taken me months to gain access to an oscilloscope. I finally found a technical school in the area that has been kind enough to let me use the scopes in their lab to do the tests on my project. Thus far, I've only been able to learn the bare essentials - and p...
by Sparky Williams
Wed Jun 09, 2004 3:42 pm
Forum: General Discussion
Topic: Oscilloscope question
Replies: 8
Views: 2050

Oscilloscope question

I am a novice, and am learning to use an oscilloscope that I have access to in order to troubleshoot a wireless remote control project (transmitter & receiver)I've built from an article featured in Nuts & Volts Magazine (April 2002).The remote control unit can be used to turn on, say a livingroom la...
by Sparky Williams
Fri Apr 02, 2004 7:39 pm
Forum: General Discussion
Topic: How to test for hot (positive) wire?
Replies: 7
Views: 1941

Re: How to test for hot (positive) wire?

Haklesup,<p>Thanks for your reply. Maybe you can clear up some questions I have: 1) what is a "hot" wire?; and 2)why is one of the wires from the transformer black and white stripped and the other solid black?
by Sparky Williams
Fri Apr 02, 2004 4:14 pm
Forum: General Discussion
Topic: How to test for hot (positive) wire?
Replies: 7
Views: 1941

How to test for hot (positive) wire?

I have a step-down wall transformer that reduces household AC voltage to 12AC. It has a black wire and one that is black and white stripped. How can I test to see which wire is the positive one? <p>I put the red lead of my very inexpensive multimeter to the stripped wire and the black lead to the bl...
by Sparky Williams
Sun Feb 29, 2004 4:51 pm
Forum: General Discussion
Topic: Wireless Remote Control troubleshooting question
Replies: 15
Views: 3430

Re: Wireless Remote Control troubleshooting question

Edd,<p>Correction -- I meant pin 2, not pin 3.
by Sparky Williams
Sun Feb 29, 2004 4:49 pm
Forum: General Discussion
Topic: Wireless Remote Control troubleshooting question
Replies: 15
Views: 3430

Re: Wireless Remote Control troubleshooting question

Edd,<p>How do I confirm that pins 3 and 8 are at the low position?
by Sparky Williams
Sun Feb 29, 2004 4:45 pm
Forum: General Discussion
Topic: Wireless Remote Control troubleshooting question
Replies: 15
Views: 3430

Re: Wireless Remote Control troubleshooting question

Jwax<p>The circuit incorporates a linear regulator chip that provides 5 volts to power the circuit.
by Sparky Williams
Fri Feb 27, 2004 9:30 pm
Forum: General Discussion
Topic: Wireless Remote Control troubleshooting question
Replies: 15
Views: 3430

Re: Wireless Remote Control troubleshooting question

Edd, <p>Both RF modules are made by Linx (tranmitter part no. TXM-418-LC; receiver part no. RXM-418-LC-S). I downloaded and read the tech sheets on both modules, including their pin descriptions, trying to gain any helpful information and was not able to find anything that was helpful to me. <p>As f...
by Sparky Williams
Fri Feb 27, 2004 4:51 pm
Forum: General Discussion
Topic: Wireless Remote Control troubleshooting question
Replies: 15
Views: 3430

Wireless Remote Control troubleshooting question

I've built a transmitter and a receiver for a remote control unit featured in a Nuts and Volts article (April 2002), "Build a 418 MHz Wireless Remote Control," and unfortunately can't get it to work. <p>Although the article calls for construction on PC boards, I've constructed the transmitter and re...
by Sparky Williams
Mon Feb 16, 2004 10:56 pm
Forum: General Discussion
Topic: Vdd and Vss meaning?
Replies: 3
Views: 1195

Re: Vdd and Vss meaning?

Thanks for your help.<p>Zeek
by Sparky Williams
Sat Feb 14, 2004 7:18 pm
Forum: General Discussion
Topic: Vdd and Vss meaning?
Replies: 3
Views: 1195

Vdd and Vss meaning?

I've seen reference to "Vdd" and "Vss," but I'm not sure of the meaning of these terms. Can someone tell me what they mean?<p>Tbanks.
by Sparky Williams
Wed Jan 07, 2004 9:07 pm
Forum: General Discussion
Topic: Need Advice on Multimeter purchase
Replies: 16
Views: 4013

Re: Need Advice on Multimeter purchase

Thanks fellas for the good advice. That $2.99 special sounds awfully tempting.
by Sparky Williams
Tue Jan 06, 2004 11:10 am
Forum: General Discussion
Topic: Need Advice on Multimeter purchase
Replies: 16
Views: 4013

Need Advice on Multimeter purchase

Can anyone out there give me some tips on buying a multimeter in terms of features to look for, brand, type, etc. I'm a beginner and am building two electronic circuits (DC) for the first time. One circuit will run on a 3 volt battery and the other will run on 12 volts DC. The instructions recommend...
by Sparky Williams
Thu Jan 01, 2004 1:16 am
Forum: General Discussion
Topic: Circuit Common?
Replies: 10
Views: 2357

Re: Circuit Common?

I forgot to mention -- for what it's worth -- this article appeared in Nuts & Volts (April, 2002). <p>Zeek