Hobby Electronics Basics

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thinking about a 200 amp 12v pwm controller

I"ve started looking into putting together around a 200-250 amp 12v pwm controller for a DC drive i have. I've got the...
2 comments posted 18yrs
posted by nope
2 comments posted 18yrs posted by nope

ic 555 timer small diagram needed

right what i need is a diagram for the conditions i need... let me explain i need to press and release a NO switch and...
16 comments posted 18yrs
posted by porkysh1t
16 comments posted 18yrs posted by porkysh1t

Understanding voltage

Hey, I'm in 3rd year mechanical engineering and I still don't feel like I have a strong understanding of what voltage i...
69 comments posted 18yrs
posted by bgold12
69 comments posted 18yrs posted by bgold12

Replacing Thermal fuse

I have a dishwasher who's heating coil stopped working. Looked at the bottom and the hot wire was charred and broken aw...
15 comments posted 18yrs
posted by Jon_Slaughter
15 comments posted 18yrs posted by Jon_Slaughter

A Tunnel Diode Paradox

Suppose that a tunnel diode wired in series with a load resistor is connected to a battery. The load resistor value is...
8 comments posted 18yrs
posted by jalbers
8 comments posted 18yrs posted by jalbers

trigger for digital camera

I've got a digital camera that I am trying to connect to a motion sensor. I've disassembled it and have the wires avail...
8 comments posted 18yrs
posted by jchickering
8 comments posted 18yrs posted by jchickering

ba1404 clock signal

Hi guys. I build a FM transmitter based on the ba1404 chip. The problem arises because this chip need a 38Khz crystal f...
0 comments posted 18yrs
posted by gulanito
0 comments posted 18yrs posted by gulanito

3 Phase run on 2?

Can a 3 phase motor run on less? I have a washing machine that uses 1 phase through a "phase converter" to run a 3 phas...
7 comments posted 18yrs
posted by Jon_Slaughter
7 comments posted 18yrs posted by Jon_Slaughter

Uninterrupted power supplies types and maintenance

UPS or Uninterrupted Power Supplies is an important unit of the AC Power Conditioning Systems the world over and along...
3 comments posted 18yrs
posted by nloknath
3 comments posted 18yrs posted by nloknath

battery charger circuit overload

Hello, I have a battery charger here http://www3.sympatico.ca/captoro/motor/fullCircuit.gif the circuit is in two phase...
10 comments posted 18yrs
posted by lerameur
10 comments posted 18yrs posted by lerameur

Don't touch that base lead! (Photo Transistor)

I want to play around with some phototransistors and am curious about the base lead. It seems like this lead is treated...
8 comments posted 18yrs
posted by jalbers
8 comments posted 18yrs posted by jalbers

cable connector wire question

Hello, I've been having a hard time locating this and was wondering if anyone knew where I might find one.... I need a...
5 comments posted 18yrs
posted by panfilero
5 comments posted 18yrs posted by panfilero

Need to understand how optocoupler work

I am trying figure out how an optocoupler (http://pdf1.alldatasheet.com/datasheet-pdf/view/2847/MOTOROLA/4N29.html) wor...
7 comments posted 18yrs
posted by test
7 comments posted 18yrs posted by test

RSDS LCD

Hi All I need to program a Graphical Display Controller which supports RSDS LCD (with or without TCON), do any of you h...
0 comments posted 18yrs
posted by jackymaillist
0 comments posted 18yrs posted by jackymaillist

Supply Voltage vs Voltage Rating

I have a speaker which is rated at 100V, yet the supply voltage is 115V. The speaker works fine. What's the deal? Cheers...
3 comments posted 18yrs
posted by anonemail1
3 comments posted 18yrs posted by anonemail1