Hobby Electronics Basics

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Hall Plate : AC input behavior?

Hi All, I have a basic question regarding Hall plates for a course I am taking. (I understand the basic operation of a...
2 comments posted 20yrs
posted by a7b98208
2 comments posted 20yrs posted by a7b98208

Electret Mic to Drive Logic (Clap or Whistle)

What is the easiest way to drive a logic high input pin on a microcontroller with an electret microphone? I want the mi...
6 comments posted 20yrs
posted by ikenewton
6 comments posted 20yrs posted by ikenewton

LED Christmas Lights

Hi Guys I have a very limited knowledge of electronics but understand the basics I have a question about those new LED...
7 comments posted 20yrs
posted by rickj
7 comments posted 20yrs posted by rickj

AC timer circuit

I would like to build a device which turns an AC power outlet for a predetermined (ideally adjustable or programmable)...
14 comments posted 20yrs
posted by dspear99ca
14 comments posted 20yrs posted by dspear99ca

24Hr/7 Day Timer

I have a project that requires turning a plastic disc (about the same size as a CD) through 360 degrees in 7 days or 24...
8 comments posted 20yrs
posted by noemail
8 comments posted 20yrs posted by noemail

555 Circuit Problem

I am trying out my first electronics project, a LED flasher that looks like http://ourworld.compuserve.com/homepages/Bi...
13 comments posted 20yrs
posted by dummy
13 comments posted 20yrs posted by dummy

RS485 Chip

I have a 75176 RS485 Transceiver chip here. Looking at the application notes, it seems pretty straight forward to hook...
4 comments posted 20yrs
posted by rwskinnerATawesomenetDOTnet
4 comments posted 20yrs posted by rwskinnerATawesomenetDOTnet

Help with a schematic!

I've just completed this device and it does what it's supposed to(distort a guitars output signal) but has no gain... C...
3 comments posted 20yrs
posted by william_gallagher
3 comments posted 20yrs posted by william_gallagher

A question on a transformer?

Last time I posted a question about power lost on the transmission line and I thank everyone for answering my question....
4 comments posted 20yrs
posted by henryc
4 comments posted 20yrs posted by henryc

Resistor-Capacitor circuit

How can I solve the following problem: "Show that the voltage Vc (t) across the capacitor as a function of time goes as...
13 comments posted 20yrs
posted by jkrebs
13 comments posted 20yrs posted by jkrebs

Basic Transformer Question

I have a transformer with a 120V primary and a center tapped secondary, each side producing 51V. I can see 4 wires comm...
6 comments posted 20yrs
posted by jalbers
6 comments posted 20yrs posted by jalbers

ADC-Will this setup work ?

I have been building a data acquisition system to be connected to a pentium 4 system. But the problem is scanning rate...
6 comments posted 20yrs
posted by brazingo
6 comments posted 20yrs posted by brazingo

Autocorrecting multimeter?

Dear Newgroup, I came across an interesting phenomenon: In the lab we placed a "100M" Ohm resistor (whose resistance we...
16 comments posted 20yrs
posted by bbiritz
16 comments posted 20yrs posted by bbiritz

Question on power lost?

I have a simple question. The way the power company delivers power from the power plant to the homes is using stepped-u...
9 comments posted 20yrs
posted by henryc
9 comments posted 20yrs posted by henryc

Reading input to parallel port

Hi, I am trying to capture an input with a status pin on the standard IBM parallel port. I looks like all the status pi...
15 comments posted 20yrs
posted by peter
15 comments posted 20yrs posted by peter