Hobby Electronics Basics

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Good coating for condensation protection?

I've got a temperature sensor circuit which is subject to severe condensation. What's a good protective coating? I was...
16 comments posted 21yrs
posted by Me7
16 comments posted 21yrs posted by Me7

PCB Design/Layout Software

I am looking for something basic to use at home for small projects. I have downloaded a few examples, PCB Wizard I like...
11 comments posted 21yrs
posted by james.douglas
11 comments posted 21yrs posted by james.douglas

555 timer circuit

Hello,I made a simple astable 555 timer circuit the same as the one on the 555 web site,but im having trouble working o...
7 comments posted 21yrs
posted by burtonfamily
7 comments posted 21yrs posted by burtonfamily

Mood Light Panel - how to?

Has anyone else seen these panels out there? They are ridiculasly priced at over $400 for a 2x2 ft. square panel made u...
12 comments posted 21yrs
posted by wanton
12 comments posted 21yrs posted by wanton

Where To Buy Emergency Stop Buttons?

Where can I buy several inexpensive (red) emergency stop buttons? I have looked many places for such buttons and the be...
10 comments posted 21yrs
posted by LunarBrass
10 comments posted 21yrs posted by LunarBrass

Need help with a circuit

I need a circuit that can perform the following if (x < -1) x = 0 else if (x < 1) x = sqrt(1 - (x^2)) else x = 0 Now wh...
12 comments posted 21yrs
posted by GhostOfACPast
12 comments posted 21yrs posted by GhostOfACPast

newbie DC question

Greetings. I've been studying electronics on my own for a little while now, and there's one basic concept I can't seem...
7 comments posted 21yrs
posted by rsnyder
7 comments posted 21yrs posted by rsnyder

Shut down voltage

On my 6 volt camera flash (Sony hvl-f32x) does anyone know the approximate shutdown voltage. I thank you for any help yo...
0 comments posted 21yrs
posted by kreb
0 comments posted 21yrs posted by kreb

Protecting ADC Inputs

I'm built a circuit board for my Analog card. My normal inputs will be 0-5 vdc but the max allowed on the ADC is 10 vdc...
2 comments posted 21yrs
posted by rwskinner ATawesomenet Dot net
2 comments posted 21yrs posted by rwskinner ATawesomenet Dot net

Antenna link

Hi, A while ago i posted a question about what I can do with that dish i found. Something useful i though others might l...
15 comments posted 21yrs
posted by jasd
15 comments posted 21yrs posted by jasd

Making PC Boards

I'm looking at either finding or making some small PC boards. They need to be about a 1/2 inch square. I'm wanting to m...
2 comments posted 21yrs
posted by palmerhudson
2 comments posted 21yrs posted by palmerhudson

Second Stage of Op-Am (Current to Voltage)

I'm reading Tom Frederickson's "Intuitive IC Op Amps" - in particular pg 15 concerning the op-amp schematic, and am not...
26 comments posted 21yrs
posted by chickenkungpao
26 comments posted 21yrs posted by chickenkungpao

AM386DX/DXL CPU - datasheet?

I'm looking for a datasheet for the AMD386DX/DXL-25 CPU - this is in a PQFP package, 132 pins and is surface mounted. C...
0 comments posted 21yrs
posted by mjones98
0 comments posted 21yrs posted by mjones98

Help Broken SATA Pin

Hi, I recently upgraded my computer, accidently I broke one of the SATA pins and the leg was stuck inside the plastic j...
0 comments posted 21yrs
posted by jl
0 comments posted 21yrs posted by jl

Need a circuit! Sinewave Generator

Hi there, I am a violin maker, and I need a circuit for a signal generator, to test the resonant frequency of my fronts...
7 comments posted 21yrs
posted by gmb
7 comments posted 21yrs posted by gmb