Hobby Electronics Basics

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Silicon Controlled rectifier

A curcuit I would like to build calls for a 6 amp. 200 volt SCR. I can't seem to find that particular component and was...
7 comments posted 19yrs
posted by jstribrny
7 comments posted 19yrs posted by jstribrny

Quick confirmation on Acm

I am trying to put together a paper on common-mode rejection, and I am stuck on the concept of common-mode gain (Acm)....
1 comments posted 19yrs
posted by waynelittle
1 comments posted 19yrs posted by waynelittle

balcony fillers

Okay guys. i have a few fillers that i would like to hang from the 2nd balcony in my auditorium. it has a cathedral cei...
2 comments posted 19yrs
posted by rachbuckley
2 comments posted 19yrs posted by rachbuckley

Rubbish camera batteries

My proprietary camera batteries don't last long when new and as I'm not a photography enthusiast I find, when the camer...
9 comments posted 19yrs
posted by Periproct
9 comments posted 19yrs posted by Periproct

Large Piezo Elements?

Hi All, I have a circuit for driving large piezo elements, but I can't seem to find large elements anywhere. I'm talkin...
17 comments posted 19yrs
posted by terpas
17 comments posted 19yrs posted by terpas

Light Dependant Resistor

I've just pulled a solar garden light apart and the LDR is connected to the little LED board with single wires shrouded...
4 comments posted 19yrs
posted by spamfree
4 comments posted 19yrs posted by spamfree

Quick Capacitor Question?

Hi, just wanted to know: If I can't find a ceramic of the value I need, can I place two elects of half value in paralle...
15 comments posted 19yrs
posted by Me
15 comments posted 19yrs posted by Me

Resistance between spherical conductors

Hi! I have a problem and I have no clue how to do it... The space between two concentric spherical-shell conductors is...
6 comments posted 19yrs
posted by danielle_m_bradley
6 comments posted 19yrs posted by danielle_m_bradley

Servo control with vb after packaging problems

Hi all this might be better asked in a vb group, but i would like to ask here as well.. I am controlling servos via lpt...
5 comments posted 19yrs
posted by mpick0658
5 comments posted 19yrs posted by mpick0658

Noisy buzzer on PIC output

I am driving a piezo buzzer (RS 273-074 3-16v DC) from one of the outputs of a PIC16F88. I am getting a very faint buzz...
5 comments posted 19yrs
posted by N
5 comments posted 19yrs posted by N

AC induction motor for EVs?

Evidently there is some engineering reason that AC propulsion makes their EV motor and controller use 300+ VAC. I'm a l...
2 comments posted 19yrs
posted by bobgardner
2 comments posted 19yrs posted by bobgardner

The Forgotten Slaves

WHEN EUROPEANS WERE SLAVES: RESEARCH SUGGESTS WHITE SLAVERY WAS MUCH MORE COMMON THAN PREVIOUSLY BELIEVED COLUMBUS, Ohi...
3 comments posted 19yrs
posted by sparky12x
3 comments posted 19yrs posted by sparky12x

3 pole dc motor with commutator?

The standard slot car motor was a 3 pole mabuchi motor with two magnets on the side of the case. The poles were 120 deg...
5 comments posted 19yrs
posted by bobgardner
5 comments posted 19yrs posted by bobgardner

Litz wire for AM ferrite Rod Antenna?

How much improvement can I expect using Litz wire to wind a AM ferrite Rod antenna as opposed to using solid copper wir...
29 comments posted 19yrs
posted by wrongaddress
29 comments posted 19yrs posted by wrongaddress

How do I go about designing a threshold amplifier?

Greetings everyone! I was using a comparator as a threshold detector for part of my circuit. Then, I realized that with...
6 comments posted 19yrs
posted by mr.whatever
6 comments posted 19yrs posted by mr.whatever