Hobby Electronics Basics

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Calculate speed when skiing?

I'm working with a specially designed application for calculating the speed when skiing - without having any fixed refe...
5 comments posted 22yrs
posted by he-stava
5 comments posted 22yrs posted by he-stava

Water resistant motor

Hi, Can someone please tell me if there's a small, *water proof* DC motor available to buy which I can leave permanentl...
42 comments posted 22yrs
posted by abdul.ahad
42 comments posted 22yrs posted by abdul.ahad

Questions in regard to Art of Electronics

I recently started teaching myself electronics in my spare time with the help of "The Art of Electronics" and its stude...
20 comments posted 22yrs
posted by hakonrk
20 comments posted 22yrs posted by hakonrk

What type of choke/resonant frequency?

Hi, I'm trying to use a Toslink optical audio receiver module (TORX176) in a circuit. The datasheet says it needs a 47u...
2 comments posted 22yrs
posted by me
2 comments posted 22yrs posted by me

Duracell Battery Exploded

Two days ago, I installed a new 9V battery in a smoke detector. During the night I was awaken by a loud bang. The newly...
0 comments posted 22yrs
posted by private
0 comments posted 22yrs posted by private

attraction force on electromagnets

hi everybody. the question is simple: what's the formula to calculate attraction force of an electromagnet (in newtons)...
2 comments posted 22yrs
posted by camilogil
2 comments posted 22yrs posted by camilogil

Does my computer have a Microcontroller in it?

I know it has a Microprocessor, but does it also have a Microcontroller? For example, I am (from a project I found) goi...
6 comments posted 22yrs
posted by john_20_28_2000
6 comments posted 22yrs posted by john_20_28_2000

Inductor Q measurement

Does anyone know how to measure the Q value of an inductor, using Agilent's ADS? Or any simulation package? I have a in...
3 comments posted 22yrs
posted by phillenium2002
3 comments posted 22yrs posted by phillenium2002

FE33L serial output to RS-232

Hi Does anybody have experience of the Maplin (FE33L) temperature control module? It has a 13-bit serial output (it's a...
2 comments posted 22yrs
posted by mark.mcgee
2 comments posted 22yrs posted by mark.mcgee

How do I set a Divide-By-N counter High or Low

I need to know how to set the pins on a Divide-By-N counter either High or Low on a PCB. Also is "1" and "0" the same as...
2 comments posted 22yrs
posted by <elehman1
2 comments posted 22yrs posted by <elehman1

Can bench top power supply act as a charger ?

I build a bench top power supply unit for my hobby 0 to 30 volt 1 amp.I try to charge my lead acid battery with proper...
6 comments posted 22yrs
posted by mowhoong
6 comments posted 22yrs posted by mowhoong

MOS Capacitor

Hello Everyone, I wanted to know is there any way we can find the Threshold Voltage (Vt) and Flatband Voltage (Vfb) of...
2 comments posted 22yrs
posted by confused.mind
2 comments posted 22yrs posted by confused.mind

Pic 16F84A Programming

All right, I don't know much about electronics so try to bear with me here. I got all the stuff I need to program a Pic...
6 comments posted 22yrs
posted by marcusyu005
6 comments posted 22yrs posted by marcusyu005

Is an Enertec Schumberger oscope any good?

After that disappointing tektronic scope, my friend found another scope which appears to be in working condition. It's...
9 comments posted 22yrs
posted by a?n?g?e?l
9 comments posted 22yrs posted by a?n?g?e?l

Simple thermostatic switch?

Just a simple bi-metallic would do. Need to keep a box full of electronics warm during winter. Threshold spec can be an...
15 comments posted 22yrs
posted by me
15 comments posted 22yrs posted by me