Hobby Electronics Basics

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Inductor question 2

I would like to build a circuit which uses a variable inductor as the input to set some states for output out of a micr...
1 comments posted 22yrs
posted by rspinks1
1 comments posted 22yrs posted by rspinks1

Help identifying ICs

I have a handful of chips here that I can't figure out what they are. Their markings are: UA3403PC F7827 DJAKARTA UA340...
6 comments posted 22yrs
posted by fozztexx
6 comments posted 22yrs posted by fozztexx

Diode-Resistor AND gate question

An AND gate can be made of two diodes and a resistor: +5V | R | A -|
17 comments posted 22yrs
posted by christopher.m.collins
17 comments posted 22yrs posted by christopher.m.collins

Chasing back to back

What is the meaning of those symbols in PCI timing diagram ? There are 2 arrows chasing back to back to form a circle. T...
0 comments posted 22yrs
posted by tatto0_2000
0 comments posted 22yrs posted by tatto0_2000

Advice on Electronic Labs?

Hello, I took an electric circuit theory course in college. That was several years ago, and I've had an itch to revisit...
8 comments posted 22yrs
posted by spacerook
8 comments posted 22yrs posted by spacerook

Automatic voltage scaling with op-amp?

I recently got a grab bag of parts from an electronics supplier. I was going through the chips I got and I'm wondering...
7 comments posted 22yrs
posted by fozztexx
7 comments posted 22yrs posted by fozztexx

Waveguide theory and wells

Well, after asking questions about waveguides I found a primer on waveguide theory at the Fast Neutron Research Facilit...
1 comments posted 22yrs
posted by etpm
1 comments posted 22yrs posted by etpm

Waveguides and 900 MHz

It was mentioned that a 6 inch diameter steel pipe might act as a waveguide to a transmitter located 60 feet into the p...
13 comments posted 22yrs
posted by etpm
13 comments posted 22yrs posted by etpm

RC transmiter

Hi I'm flying radio controled aircraft models . I thought to increase the transmited power from the transmiter can anyon...
3 comments posted 22yrs
posted by mrdan
3 comments posted 22yrs posted by mrdan

inductor question

If you have a length (l) of wire coiled to make an inductor and you stretch the wire (ie. space the coils further) but...
2 comments posted 22yrs
posted by rspinks1
2 comments posted 22yrs posted by rspinks1

Inductor question

If you have a length (l) of wire coiled to make an inductor and you stretch the wire (ie. space the coils further) but...
2 comments posted 22yrs
posted by rspinks1
2 comments posted 22yrs posted by rspinks1

My ICs are getting hot :(

Hey Everyone, I got a heat problem with some circuit I made and I hope you can help. First let me give a short descript...
1 comments posted 22yrs
posted by edoreshef
1 comments posted 22yrs posted by edoreshef

1 watt luxeon of 12 volts dc

hi , i am using 2 1 watt luxeon red leds for brake lights , can i run these of 12 volts via a resistor, or do i need a...
5 comments posted 22yrs
posted by krawczuk
5 comments posted 22yrs posted by krawczuk