Hobby Electronics Basics

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Damaging computer monitor with wrong input?

I'm working on an output circuit from a computer which outputs two different kind of signals according to which mode it...
7 comments posted 19yrs
posted by no-spam2
7 comments posted 19yrs posted by no-spam2

Static Electricity and Ferric Chloride (argh!)

I'm a little upset right now, so please consider that when reading. If you don't care, feel free to go to the next thre...
17 comments posted 19yrs
posted by puckdropper
17 comments posted 19yrs posted by puckdropper

NPN / N-channel

I'm diving back in to discrete component circuit design again after a few years, and I'm blanking out, is there any fun...
2 comments posted 19yrs
posted by mattkrass
2 comments posted 19yrs posted by mattkrass

LED indicator keeps failing

We have a line that uses a bunch of tri color led indicators. They are listed to work with voltages of 12-24 VDC. They...
14 comments posted 19yrs
posted by clutch
14 comments posted 19yrs posted by clutch

Flyback Diode

Hi, How do you go about choosing a suitable flyback diode for a 1.8kW 36V motor? Does it have to be able to handle above...
1 comments posted 19yrs
posted by QmQiQcQhQaQeQlQhQiQmQsQ
1 comments posted 19yrs posted by QmQiQcQhQaQeQlQhQiQmQsQ

Sharpen and Re-tin Soldering Iron Tips

Hello All, I tried to sharpen and re-tin a tired tip once and failed. I'm about ready for another new one and was wonde...
12 comments posted 19yrs
posted by jecottrell65
12 comments posted 19yrs posted by jecottrell65

TNC

I was just wondering what the word "threaded" refers to in the context of a Threaded Neill-Concelman (TNC) connector. I...
5 comments posted 19yrs
posted by mike7411
5 comments posted 19yrs posted by mike7411

007 style

I'd like to set up a walk-in sensor. Something like the things you see in all those 007 movies. When someone walks thro...
12 comments posted 19yrs
posted by jrojaspin
12 comments posted 19yrs posted by jrojaspin

Boarding the microcontroller-train

During the past two years I've been thinking of - but never got the grip to - starting to learn how to use microcontrol...
13 comments posted 19yrs
posted by bos
13 comments posted 19yrs posted by bos

Circuit for a musical fountain

Can anyone help me in designing a circuit for a musical fountain???
5 comments posted 19yrs
posted by prakhar2310
5 comments posted 19yrs posted by prakhar2310

555 Timer Duty Cycle

Hi, I'm trying to use a 555 timer to produce a PWM waveform however can't find any reference as to how the value of the...
5 comments posted 19yrs
posted by QmQiQcQhQaQeQlQhQiQmQsQ
5 comments posted 19yrs posted by QmQiQcQhQaQeQlQhQiQmQsQ

transistor models (newbie question)

hello. i wonder if you can help me... as a newbie, is there someplace where can i find a good explanation of transistor...
8 comments posted 19yrs
posted by sean_mcilroy
8 comments posted 19yrs posted by sean_mcilroy