Hobby Electronics Basics

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film capacitor life test

Hi everybody, I am curious about how to test film capacitor's life. What are the main parameters that effect a film cap...
2 comments posted 17yrs
posted by manilresat
2 comments posted 17yrs posted by manilresat

Radio: Absolute Basics

Howdy folks. I've been really interested in building a simple AM radio for a long time, but I've always wanted to under...
9 comments posted 17yrs
posted by fyberoptic
9 comments posted 17yrs posted by fyberoptic

Is there such a thing as CFDVRAM?

Hi: Is there such a thing as Capacitor-Free Dynamic Volatile Random Access Memory? Thanks
7 comments posted 17yrs
posted by glucegen1x
7 comments posted 17yrs posted by glucegen1x

Very OT: My Vintage Dream PC

Hi: My vintage dream PC contains the most advanced motherboard [in terms of ability to handle the highest processor spe...
0 comments posted 17yrs
posted by glucegen1x
0 comments posted 17yrs posted by glucegen1x

Elementary AC circuit analysis

I'm trying to calculate a voltage in a circuit, and having the problem that I can't quite remember simple circuit theor...
6 comments posted 17yrs
posted by theom+news
6 comments posted 17yrs posted by theom+news

TRIAC gate control problem

Hello All We have a problem with the a TRIAC device we are using. We are using it to switch 230V AC mains on and Off. T...
22 comments posted 17yrs
posted by dgleeson3
22 comments posted 17yrs posted by dgleeson3

microprocessor 8086 HELP

hello guys.. i want a program which find the prime numbers from 1 to N (N is given from keyboard) and result shown in th...
5 comments posted 17yrs
posted by pchelpmanC
5 comments posted 17yrs posted by pchelpmanC

Getting into CPLD

Hiya folks. I've been really interested in PLD/CPLD technology ever since I learned that I could replace tons of logic...
3 comments posted 17yrs
posted by fyberoptic
3 comments posted 17yrs posted by fyberoptic

Can I use any 12V adaptor for a keyboard?

I bouth an electronic keyboard that requires a 12V 1.5 A AC adaptor but did not come with one. I have a 12V 1300 mA ada...
9 comments posted 17yrs
posted by nonsense
9 comments posted 17yrs posted by nonsense

Extech DMMs -- not a serious tool

Extech DMMs have a "power-saving" feature that powers off the meter after 15 minutes. That's 15 minutes after turning i...
7 comments posted 17yrs
posted by incognito
7 comments posted 17yrs posted by incognito

general question about pwm and brushless fans

I have a fan I want to use with continuously variable speed. It is a brush less type (specs on this one say 7-12 volts)...
9 comments posted 17yrs
posted by default
9 comments posted 17yrs posted by default

Wire wound Power Resister reactance to AF

I am planing on making a dummy load for an audio amplifier to do some testing and was wondering if this resister would...
17 comments posted 17yrs
posted by 1qazse4
17 comments posted 17yrs posted by 1qazse4

Question about electrons and voltage

Hi: An electron has charge of 1.602 =D7 10^-19 coulombs. Does this mean that the potential difference -- when comparing...
7 comments posted 17yrs
posted by glucegen1x
7 comments posted 17yrs posted by glucegen1x

Power Factor Optimization

Hello all from a long time lurker! I have been approached by a rep from a small local company trying to sell us a Power...
7 comments posted 17yrs
posted by nospam
7 comments posted 17yrs posted by nospam