Hobby Electronics Basics

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Dressing Up Tech With Math

> clothe your banal pronouncements in the proper mathematical > raiments. You think math is to "dress up" tech? Did you...
4 comments posted 17yrs
posted by BretCahill
4 comments posted 17yrs posted by BretCahill

Ink Level Detection In Jet Printers

What is the method of determining the ink level? Bret Cahill
12 comments posted 17yrs
posted by BretCahill
12 comments posted 17yrs posted by BretCahill

program to burn hex files to picstart plus

Since I gave up on the homebuilt programmers I have been happy with MPLab and pickstart plus (USB OLIMEX job), but now...
2 comments posted 17yrs
posted by sambo
2 comments posted 17yrs posted by sambo

brushed pwm controller motor "surging"

i set up a basic lm324 15kz uni-directional pwm motor controller. this goes to a tc4422 mosfet driver and then to 2 irf...
8 comments posted 17yrs
posted by nate53143
8 comments posted 17yrs posted by nate53143

12VDC motor problems

I have a 12VDC wiper motor that is being used in one of those animal cranes as a drive for a platter. It stopped workin...
9 comments posted 17yrs
posted by uriahsky
9 comments posted 17yrs posted by uriahsky

The Problem With Faking A Tech Background

< > > When you are off these interstates you run your hybrid electric or EV < > > on gas or batteries respectively and...
31 comments posted 17yrs
posted by BretCahill
31 comments posted 17yrs posted by BretCahill

confusion on diode polarity

I'm trying to make a basic circuit with a diode. Had it not been marked "cathode/anode" I would have not been confused...
24 comments posted 17yrs
posted by rabiticide
24 comments posted 17yrs posted by rabiticide

QUESTION: What is a "locally active resistor"?

Hi all I came across the article on "Chua's circuit" in Wikipedia (at ). This circuit "exhibits classic chaos theory be...
3 comments posted 17yrs
posted by santa
3 comments posted 17yrs posted by santa

Blinking DC Christmas Lights

I bought a string of 10 DC, c-battery, power lights. Is there some device that can be connected into it to make the lig...
10 comments posted 17yrs
posted by notvalid2
10 comments posted 17yrs posted by notvalid2

building microwind and microhydro generators

Looking for some tips on homemade microwind and microhydro generators. I have a site near the top of a mountain far fro...
24 comments posted 17yrs
posted by dlwebb
24 comments posted 17yrs posted by dlwebb

Frequency of Train Traffic v Interstate Traffic

The most heavily traveled rail lines are occupied by rolling rolling stock only 5% of the time. For most interstate tra...
3 comments posted 17yrs
posted by BretCahill
3 comments posted 17yrs posted by BretCahill

A North American (USA) electrical code question

Greetings All, I've looked thgrough the NEC code book but have been unable to find my answer there. I'm sure it's there...
4 comments posted 17yrs
posted by etpm
4 comments posted 17yrs posted by etpm