Hobby Electronics Basics

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Powering Rope Light With Batteries?

So I've got two 20 ft lengths of rope light: Specs: AC 120V, 60Hz, 0.5A And I'd like to use one or both via battery powe...
7 comments posted 19yrs
posted by jstealth03
7 comments posted 19yrs posted by jstealth03

cellphone charger making cracking noise

Hi, I recently bought a (non original) charger for my cellphone (o2 atom) . After 3-4 uses without problems , now when...
16 comments posted 19yrs
posted by interuser
16 comments posted 19yrs posted by interuser

Bosch relay -- which voltages?

If a Bosch-type relay is rated say "20/30 amps," which set of contacts is the "20" -- energized or not-energized? Ken C
5 comments posted 19yrs
posted by cprstn54
5 comments posted 19yrs posted by cprstn54

A problem sharing a power supply

Hello all, I'm having trouble sharing a power supply between a MCU and a VFD display driver circuit. The design uses an...
0 comments posted 19yrs
posted by fahrenheit_451_v
0 comments posted 19yrs posted by fahrenheit_451_v

Phono Preamp as Line-Out Amp for Speaker

Will a phono preamp work for boosting the line-out signal from a computer sound card to that of 'speaker level' for run...
2 comments posted 19yrs
posted by whatelse
2 comments posted 19yrs posted by whatelse

making something for the first time

hi i have to convert 50V analog at 100KHz to 50V digital at 100KHz, so i need help, like how do i proceed what is in my...
3 comments posted 19yrs
posted by vyas.siddharth
3 comments posted 19yrs posted by vyas.siddharth

seeing voltage levels on IC Chips

What I would like to do is to put a clip on a 16-64 pin chip and see what is happening on each pin. Using a computer or...
2 comments posted 19yrs
posted by uriahsky
2 comments posted 19yrs posted by uriahsky

A/D: track & hold?

Re: A/D converters - what is the difference, if any, between sample & hold, vs. track & hold? I hate getting hung up on...
1 comments posted 19yrs
posted by r_delaney2001
1 comments posted 19yrs posted by r_delaney2001

DC Power Supply

hello, I am looking to buy a DC Power Supply. I am not sure of getting a digital or analog display. And also one output...
4 comments posted 19yrs
posted by lerameur
4 comments posted 19yrs posted by lerameur

"new" speaker idea

I have an idea for creating a new "omni-directional" speaker and was wondering what you guys think and how practical it...
57 comments posted 19yrs
posted by Jon_Slaughter
57 comments posted 19yrs posted by Jon_Slaughter

Simple PC Serial Port Help

Please point me toward any applicable FAQs or other groups if I am breaking protocol or in the wrong place, thanks. :)...
9 comments posted 19yrs
posted by ozraven
9 comments posted 19yrs posted by ozraven

MY FAVORITE TOOLS

MY FAVORITE TOOLS: BestPair - I wrote this myself and I use it almost every day. Absolutely the very best way to determ...
1 comments posted 19yrs
posted by RespondToGroupPlease
1 comments posted 19yrs posted by RespondToGroupPlease

building an electric circuit from paint

I'm an artist/designer and just a tiny bit familiar with electronics and I'm conducting some research for an art projec...
19 comments posted 19yrs
posted by alphacentauri
19 comments posted 19yrs posted by alphacentauri

Loud Piezo Buzzer for Timer

Hi all, as the result of a dare, I am trying to build a shooting Timer. ( a timer that responds to the sound of a firea...
3 comments posted 19yrs
posted by robert.zeilinga
3 comments posted 19yrs posted by robert.zeilinga

a help please

Hello Friends i have a request: Can anyone give a good performance emergency lamp circut for a 11Watt CFL, from 6volt ba...
2 comments posted 19yrs
posted by raghu.kalarikkal
2 comments posted 19yrs posted by raghu.kalarikkal