Hobby Electronics Basics

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Question about transistor breakdown voltage

I see in the specification sheet for a darlington transistor that its collector to emitter breakdown voltage is 100V. W...
18 comments posted 18yrs
posted by Gerbermultit00l
18 comments posted 18yrs posted by Gerbermultit00l

Max ratings of electret mic

Can anyone please give me an idea of the maximum safe P.S. voltage of the ubiquitous cheap electret microphone used in...
5 comments posted 18yrs
posted by pimpom
5 comments posted 18yrs posted by pimpom

About Radio Waves

How can we make a Radio transmitter and receiver. Pl. give me some easiest possible ways to do so.
3 comments posted 18yrs
posted by jaiprakash.788
3 comments posted 18yrs posted by jaiprakash.788

Vintage opamp

Hello I have 5 pcs used Philbrick/Nexus SL-26. I want to test the opamps but I need a datasheet. Can somebody help me??...
1 comments posted 18yrs
posted by Hojvaelde
1 comments posted 18yrs posted by Hojvaelde

Audio amplifier (part 2)

Hello, it is me again ... After "jouling" some transistors, I decide to move to LTSpice. Which is funny as I am doing e...
27 comments posted 18yrs
posted by olivier.scalbert
27 comments posted 18yrs posted by olivier.scalbert

CRT image trouble

Hello all, years ago I installed a new Happ 13" CRT in a video game I own. The game probably has about 20 hours on it s...
6 comments posted 18yrs
posted by biscuitbecks
6 comments posted 18yrs posted by biscuitbecks

questions on Class B audio amplifier

I took a look at this: http://openbookproject.net//electricCircuits/Exper/EXP_6.html#xtocid24829 It appears that this u...
31 comments posted 18yrs
posted by mrdarrett
31 comments posted 18yrs posted by mrdarrett

high current charge pump

Typical pump drivers seem limited to a few dozen mA. http://www.maxim-ic.com/appnotes.cfm/appnote_number/725 Do any cha...
2 comments posted 18yrs
posted by mrdarrett
2 comments posted 18yrs posted by mrdarrett

need help selecting a transmitter and reciever

ok, basically I want to turn on and off an analog switch wirelessly. The range I need is very short... maybe around 20f...
14 comments posted 18yrs
posted by panfilero
14 comments posted 18yrs posted by panfilero

Why use amplifier with adc?

I don't know very well how adc works, so i have a question. Most adc have a Vref pin that defines Vin range of adc. Vin...
5 comments posted 18yrs
posted by idkfaidkfaidkfa
5 comments posted 18yrs posted by idkfaidkfaidkfa

Electrifying the Interstates

Overhead wires would be pretty ugly so they'll have to install rails / wires in the pavement. The problem of metering us...
5 comments posted 18yrs
posted by BretCahill
5 comments posted 18yrs posted by BretCahill

Question - 9v Battery Heating in simplest circuit

I'm a noob doing some projects with the arduino development environment and learning as I go. I have a problem with a v...
20 comments posted 18yrs
posted by thisoldgeek
20 comments posted 18yrs posted by thisoldgeek