Hobby Electronics Basics

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RS422 RJ45 loopback cable

I created an RS422 RJ45 loopback cable by connecting pin 1 to pin 8 and pin 4 to pin 5. I also connected a few of the o...
3 comments posted 20yrs
posted by mike7411
3 comments posted 20yrs posted by mike7411

Measuring torque

Hello, I have a small DC motor. i want to measure the torque. NO datasheet of any kind. I used 15lbs (6.8Kg) weight att...
4 comments posted 20yrs
posted by lerameur
4 comments posted 20yrs posted by lerameur

AC Power cord - splicing

Hi All, I have a couple strings of new Halloween lights, which are essentially like the small incandescent bulb Christm...
10 comments posted 20yrs
posted by a7b98208
10 comments posted 20yrs posted by a7b98208

? About grounds

I think I know the answere but. I was working on a new machine and the hand held controls were sitting on a table we we...
0 comments posted 20yrs
posted by clannorm
0 comments posted 20yrs posted by clannorm

open collector question

I have an open collector toggle signal, instead of get on/off at 24 volts and grnd, I would like to get -12v to +12v, I...
6 comments posted 20yrs
posted by garyxcui
6 comments posted 20yrs posted by garyxcui

logic design question

Hello, I'm trying to build a circuit that has an array of switches (8 switches) and takes in a clock signal and compare...
12 comments posted 20yrs
posted by panfilero
12 comments posted 20yrs posted by panfilero

Current regulation confusion

I've been toying with these Luxeon white leds and the data calls for a current regulated supply. I'll assume the reason...
17 comments posted 20yrs
posted by newszz10
17 comments posted 20yrs posted by newszz10

Regulating Voltage with LM78XX

I have a project that requires 12V. I have some LM7815's and looked at the Fairchild pdf sheet and I need some help und...
28 comments posted 20yrs
posted by dwbauer
28 comments posted 20yrs posted by dwbauer

Presettable CD4510 BCD up/down counter

Help needed on how to preset the CD4510 BCD up/down counter to any digits. I am looking for a 2 digits 7 segment count d...
3 comments posted 20yrs
posted by gentech.st
3 comments posted 20yrs posted by gentech.st

making a piezo louder

I have a GPS that uses a piezo for proximity alarms. I HAVE to have it louder. With help of the boys over at electronic...
10 comments posted 20yrs
posted by Idontthinkso
10 comments posted 20yrs posted by Idontthinkso

Mobile phone connected to microcontroller project

Hello all, Im in need of some assistance, I have been scouring the web, leaving posts in forums etc to find out some in...
0 comments posted 20yrs
posted by wayne_tams
0 comments posted 20yrs posted by wayne_tams

OT Incredible Taxation

Something turning up in some blogs and RSS feeds that caught my interest. No one can make stuff like this up: In some v...
0 comments posted 20yrs
posted by default
0 comments posted 20yrs posted by default

lowering temperature of a hot glue gun

I'd like to lower the temperature of a cheap $5 hot glue gun in order to use bees wax. Would a simple dimmer used for li...
3 comments posted 20yrs
posted by mike
3 comments posted 20yrs posted by mike

LED no resister question

I have a new product I invented. It's a LED fish strike indicator. As I found out experimenting with LEDs, getting the...
15 comments posted 20yrs
posted by dplatz
15 comments posted 20yrs posted by dplatz