Hobby Electronics Basics

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DC to AC Square wave question

Hey, all, I thought this would be easy but it's not been so far. What I want to do is take a DC power supply and output...
13 comments posted 18yrs
posted by hboothe
13 comments posted 18yrs posted by hboothe

AC Adapter -- AAA battery replacement?

I don't know the best place to post this, but is there some way of "plugging in" an electronic device which accepts AAA...
2 comments posted 18yrs
posted by danr_18
2 comments posted 18yrs posted by danr_18

optical relay?

I want to operate a solenoid (6v 300mA) when a light source in interupted. I was thinking along the lines of a optical...
8 comments posted 18yrs
posted by dav1d
8 comments posted 18yrs posted by dav1d

Nokia 6600 lcd interface

Hi! i'm left out with just the lcd panel of a nokia 6600 handset. I don't seemingly have a driver board. Please help me...
3 comments posted 18yrs
posted by acorreya
3 comments posted 18yrs posted by acorreya

Large BS170 drain current in off mode

Hi, I have some basic knowledge of electronics, but I'm having trouble trying to get some real design to work. One of t...
1 comments posted 18yrs
posted by nospam
1 comments posted 18yrs posted by nospam

PIN MESFET components

Hello, I am doing my masters in electrical engineering. I would like to know whether PIN-MESFET devices are available o...
0 comments posted 18yrs
posted by vlokeswarakumar
0 comments posted 18yrs posted by vlokeswarakumar

Guitar amp re-capping

An old guitar amp is headed my way, solid state, maybe 50 Watts, maybe a couple decades old. One reads about the finite...
6 comments posted 18yrs
posted by BeardedOccam
6 comments posted 18yrs posted by BeardedOccam

exists a xenon strobe chemat to erase UV EPOMs ?

is a xenon strobe light suitable/efficient for erasing uv EPROMs are there any details that should be attended to if th...
4 comments posted 18yrs
posted by some
4 comments posted 18yrs posted by some

Help Building a USB-Controlled USB Outlet?

I am a novice and would like to build a 120V AC outlet which can be switched on and off by USB. I'm not sure what all I...
7 comments posted 18yrs
posted by noreply
7 comments posted 18yrs posted by noreply

Need stupid simple Lithium ion charger

I want to charge an 18-V lithium ion battery pack from a cordless tool that was a freebie. The battery pack seems to ha...
7 comments posted 18yrs
posted by BeardedOccam
7 comments posted 18yrs posted by BeardedOccam

Does not have any harmonics

Hi, Why does a sinusoidal waveform alone does not have any harmonics or distortion ? For example, (Reference -> http://...
76 comments posted 18yrs
posted by karthikbalaguru79
76 comments posted 18yrs posted by karthikbalaguru79

Control TV/DVD/VCR With Infrared

After getting a new TV/DVD recently and having some old smaller CE type computers with infrared ports starting thinking...
0 comments posted 18yrs
posted by pinkFloyd43
0 comments posted 18yrs posted by pinkFloyd43