Hobby Electronics Basics

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need help with rf design

Hi, I'm a relatively inexperienced electronics hobbyist and have am looking for a rf circuit to fit a certain need. Wha...
1 comments posted 21yrs
posted by blouisos
1 comments posted 21yrs posted by blouisos

Neighbor With Loud Music!!!!!!

My basement apartment neighbor plays his very loud cd stereo system. (rap music) His system is approximately twelve fee...
8 comments posted 21yrs
posted by puns
8 comments posted 21yrs posted by puns

Virtual ground or not?

Using a classic inverting op amp circuit with the "+" input tied to ground, I lift the pin and connected it 1 volt. Wil...
18 comments posted 21yrs
posted by boats_ranger
18 comments posted 21yrs posted by boats_ranger

9V battery adapter?

I have an alarm clock that I really like, it runs ONLY on a 9volt battery. Is there some sort of adapter I can buy that...
1 comments posted 21yrs
posted by not
1 comments posted 21yrs posted by not

Hall effect or proximity sensor?

What is the difference between a Hall effect transducer and a proximity sensor? It looks like one is general term and t...
4 comments posted 21yrs
posted by gashmore
4 comments posted 21yrs posted by gashmore

Solderless proto board hook up wire?

Does anyone make any ribbon with between 2 to 20 wires that will work with the .1" spacing on the solderless breadboard...
1 comments posted 21yrs
posted by 1qazse4
1 comments posted 21yrs posted by 1qazse4

14-3 shared neutral

I'd like some feed back on this one. When I built my house, I had a very honest Father and Son contractor who were jack...
19 comments posted 21yrs
posted by Beeper
19 comments posted 21yrs posted by Beeper

IDE Drive Switch

Greetings. I have three IDE ATA hard drives in my computer. I want to be able to turn each drive off or on without havi...
2 comments posted 21yrs
posted by jwells22
2 comments posted 21yrs posted by jwells22

5v to 12v Circuit

Looking for a very simple (Newby) 5v to 12v circuit, or device, low cost, to run 120 ma 12v led off 5-6v TIA
14 comments posted 21yrs
posted by LEDMan
14 comments posted 21yrs posted by LEDMan

how to generate 500v @ 200ma

Hi I would like to generate 500v @ 200ma's using a switching power supply. My input would be 12 to 24 volts. How? Basic...
0 comments posted 21yrs
posted by boats_ranger
0 comments posted 21yrs posted by boats_ranger

surface mount bypass

Can surface mount film capacitors be used as bypass capacitors in place of ceramic capacitors. Is there some rule that...
4 comments posted 21yrs
posted by aman.bindra
4 comments posted 21yrs posted by aman.bindra

op-amp integrator basic's

Hi, I am using a classic opamp integrator, my input is a 500us pulse at a freq. of 80hz. The signal can vary in amplitu...
4 comments posted 21yrs
posted by boats_ranger
4 comments posted 21yrs posted by boats_ranger

Need help with Tantalum polarity

This is my first project using tantulum capacitors. I cannot tell from the markings what the polarity is. I see a "+" t...
5 comments posted 21yrs
posted by royalmp2001
5 comments posted 21yrs posted by royalmp2001

In Circuit PIC reading

Hi I have a circuit that has a PIC controller and it has 5 connection points that are connected to the correct points f...
1 comments posted 21yrs
posted by skiing
1 comments posted 21yrs posted by skiing