Hobby Electronics Basics

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Basic diode light

I want to use a few diode to light a shadowbox and am curious about wiring it up. I understand basic electronics etc bu...
4 comments posted 21yrs
posted by mastermech
4 comments posted 21yrs posted by mastermech

Oscilliscope and Ground

I've been trying to learn how to use an oscilliscope. But I get a little confused about when and when not to use the gr...
16 comments posted 21yrs
posted by clintonb
16 comments posted 21yrs posted by clintonb

DC Relay

Hello, I'm just a complete novice when it comes to building circuitry. The current project I'm working on involves a el...
5 comments posted 21yrs
posted by joe
5 comments posted 21yrs posted by joe

Midid/Effects Pedal

I have a digitech RP12 and I use it to control my Line6 amp. I do not use the effects because they sound horrible with...
0 comments posted 21yrs
posted by wanton
0 comments posted 21yrs posted by wanton

LED Color Organ Circuit

Greetings to all - I am designing a device that uses 7 modules of colored LED's that will be used for a specific purpos...
3 comments posted 21yrs
posted by don
3 comments posted 21yrs posted by don

Need relay recommendations

--Trying to drive something with a Stamp; looking for a relay that can handle, say, 12v and maybe 2A. I know Parallax s...
1 comments posted 21yrs
posted by steamer
1 comments posted 21yrs posted by steamer

"do not load the cap"

I have a schemetic which says for a bypass capacitor "do not load" or "not to be installed". Doe anybody know the meanin...
4 comments posted 21yrs
posted by aman.bindra
4 comments posted 21yrs posted by aman.bindra

general question about audio amplifiers

Hello, A family friend swears by using vacuum tube audio amplifiers, saying that although they are less efficient, they...
38 comments posted 21yrs
posted by mike-nospam
38 comments posted 21yrs posted by mike-nospam

How to build a simple solenoid?

Hi, All: I am helping my kid with a school robotic project. One key element is to use solenoid to release a latch. The...
5 comments posted 21yrs
posted by ligengli
5 comments posted 21yrs posted by ligengli

ac and dc

Hello All, I am beginner in electronics I wish to know why do we need to do DC analysis and ac analysis of a circuit? A...
9 comments posted 21yrs
posted by cheanglong
9 comments posted 21yrs posted by cheanglong

Proper way of removing 84-pin chip from socket?

What is the correct way to remove an 84-pin chip from its' square sockect? Is a special removal tool required? I stuck...
0 comments posted 21yrs
posted by fffrd
0 comments posted 21yrs posted by fffrd

RF problem caused display to blank

I have one radio (330Mhz-400MHz), equipped with antenna and remote speaker mic. When the radio is transmitting at 4W ov...
2 comments posted 21yrs
posted by ahkit1021
2 comments posted 21yrs posted by ahkit1021

LED Life when overrun

Any pointers to LED life when over-run, ie superbright white led usually run at 20ma, what life can be expected at say 4...
5 comments posted 21yrs
posted by gef
5 comments posted 21yrs posted by gef