Hobby Electronics Basics

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Robot Motor

I found a great robot motor and now am looking for solenoids and servos. Does anyone have a great source for these? San...
2 comments posted 16yrs
posted by christian.worthington
2 comments posted 16yrs posted by christian.worthington

magnetics question

A lot of people have built the circuit in this Home Power article. http://alton-moore.net/graphics/desulfator.pdf There...
1 comments posted 16yrs
posted by nospam
1 comments posted 16yrs posted by nospam

Thermistor Voltage Supply Question

Hi guys, quick question for the experts. I'm playing with a system of thermistors feeding an RS485 Networked ADC to my...
4 comments posted 16yrs
posted by Terminal_Crazy
4 comments posted 16yrs posted by Terminal_Crazy

Flickering Light

I have a Luxo asymmetrical task light which takes an 18 watt bulb, which is starting to give me trouble. Most of the ti...
10 comments posted 16yrs
posted by don
10 comments posted 16yrs posted by don

60mV to 10V voltage amplifier

Hello group, I wish to construct a circuit to amplify an input voltage of 0 to 60mV dc to output 0 to 10V linearly. I h...
13 comments posted 16yrs
posted by allenbsf6502
13 comments posted 16yrs posted by allenbsf6502

What's the gain of this op-amp circuit?

Hi, I have been playing with op-amp for the past few weeks and I came across this circuit http://www.flickr.com/photos/...
7 comments posted 16yrs
posted by allenbsf6502
7 comments posted 16yrs posted by allenbsf6502

Voltage loss over many circuits

Hi guys: I'm an ME and I'm trying to drive a large number of circuit boards in a confined area. The circuits are all id...
11 comments posted 16yrs
posted by eromlignod
11 comments posted 16yrs posted by eromlignod

World's Largest Wheatstone Bridge

String a wire back and forth across / along a fault line to measure very small displacements in the earth's surface. If...
47 comments posted 16yrs
posted by BretCahill
47 comments posted 16yrs posted by BretCahill

Transient response to ramp input

Okay. I'll start out by saying that this is *not* a homework problem. I'm trying to recreate some work I did many years...
7 comments posted 16yrs
posted by amakyonin-u1
7 comments posted 16yrs posted by amakyonin-u1

Where to find desoldering tools in the USA?

Fry's wanted $13 for some push-down suction desoldering device. Anyone know where to get a desoldering sucker for a reas...
17 comments posted 16yrs
posted by mrdarrett
17 comments posted 16yrs posted by mrdarrett

Transistor Or Resistor

I want to make a load center to test power supplies and batteries. I was thinking of using 50 Watt 4 ohm resistors for...
38 comments posted 16yrs
posted by 1qazse4
38 comments posted 16yrs posted by 1qazse4

capacitor on series with transformer primary?

I was taking apart a broken rechargeable razor, and found a 0.15 uF, 250V capacitor in series with the primary of the (t...
8 comments posted 16yrs
posted by mrdarrett
8 comments posted 16yrs posted by mrdarrett

Open Collector?

Hi, I just built Velleman 8061 and got it eventually working - I think? But I have a question. Shouldn't I be able to s...
3 comments posted 16yrs
posted by klaine8
3 comments posted 16yrs posted by klaine8