Hobby Electronics Basics

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A tale of two Dremels

I have two Dremel tools. One is a couple decades old and has "solid state speed control." The other is fairly new. My o...
2 comments posted 18yrs
posted by BeardedOccam
2 comments posted 18yrs posted by BeardedOccam

Reduce volume of AC buzzer

I've got an old Gralab darkroom timer with a buzzer that is, to my taste, way too loud. Some Gralabs had a volume adjus...
12 comments posted 18yrs
posted by steveg
12 comments posted 18yrs posted by steveg

what is thermister?

plz.tell me what is thermister?
4 comments posted 18yrs
posted by patelhiren93
4 comments posted 18yrs posted by patelhiren93

AC charger for USB devices - what about the data pins

I've ordered a Sandisk Sansa Clip MP3 player, which charges through the USB connection to the computer. I need a wall w...
0 comments posted 18yrs
posted by gh424NO824SPAM
0 comments posted 18yrs posted by gh424NO824SPAM

Proof of Ohms law

Has anyone ever proven Ohms law from first principals? I mean is there any way to take the laws of electrostatics, and f...
18 comments posted 18yrs
posted by harrytuttle777
18 comments posted 18yrs posted by harrytuttle777

2 Transistor AM Radio

Not sure if this is the correct place to ask, but here goes... I've found plans for a simple two transistor AM radio re...
19 comments posted 18yrs
posted by the1930s
19 comments posted 18yrs posted by the1930s

Thesis Proposal

hello guys! does any of you heard of a program/system that converts html to dhtml? because it's our thesis proposal and...
1 comments posted 18yrs
posted by dugvince
1 comments posted 18yrs posted by dugvince

what or how to check CRT HV anode wire repair ?

I changed the CRT HV anode wire on TEK o'scope by ... - removing the silicon glued cover/cap - desolder old anode lead...
14 comments posted 18yrs
posted by some
14 comments posted 18yrs posted by some

New lamp dimmer application?

I was at the hardware store shelling out $20 for an "infinite range control." It is a proportioning control for an elec...
24 comments posted 18yrs
posted by default
24 comments posted 18yrs posted by default

What type of bulb to use with my color organ ?

I'm making a kind of light tower with 2" clear acrylic rod (3x 6' tall), and putting lights underneath that'll be plugg...
7 comments posted 18yrs
posted by lastchapter
7 comments posted 18yrs posted by lastchapter

Stereo to mono

Hi Folks I have a small MP3 player and I want to use only one earphone, that is mono. The output from the player is ste...
3 comments posted 18yrs
posted by clueless
3 comments posted 18yrs posted by clueless

Wii Remote shunt

I accidentally released the Wii Remote while swinging in a bowling game and it hit the wall. After a thorough check it...
4 comments posted 18yrs
posted by jerry
4 comments posted 18yrs posted by jerry

Decibels usage?

Based on one tenth of the Bel named in memory of Alexander Graham of telephone fame. Have always understood that Decibe...
5 comments posted 18yrs
posted by tsanford
5 comments posted 18yrs posted by tsanford

Simple transistor NOT gate

Hi, Is it possible to construct a simple inverter gate using 1 or 2 transistors and resistors? I tried the circuit belo...
18 comments posted 18yrs
posted by allenbsf6502
18 comments posted 18yrs posted by allenbsf6502