Hobby Electronics Basics

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How does this circuit work? Is it a pre-amp?

Hello! Happy 4th of July to my American colleagues! I have this circuit: http://bayimg.com/NaDlBAAbD How does it work?...
20 comments posted 19yrs
posted by mr.whatever
20 comments posted 19yrs posted by mr.whatever

tutorial abt C++

any one found the tutorial on C++ , java or dot.net if possible file in pdf format
2 comments posted 19yrs
posted by ronak.karanpuria
2 comments posted 19yrs posted by ronak.karanpuria

ATTiny13 voltage and current ratings

I was reading the datasheet on my ATTiny13, and noticed the following ABSOLUTE MAXIMUM ratings: Maximum Operating Volta...
11 comments posted 19yrs
posted by mrdarrett
11 comments posted 19yrs posted by mrdarrett

building an AVR programmer CABLE

I'm trying to build a parallel port AVR programmer cable. Surprisingly, this is turning out to be the most complex part...
28 comments posted 19yrs
posted by mrdarrett
28 comments posted 19yrs posted by mrdarrett

dot on a pot symbol?

Hey all; I've got a schematic that has a little dot on one of the legs of a potentiometer symbol. What does it mean? I'm...
4 comments posted 19yrs
posted by toccata
4 comments posted 19yrs posted by toccata

Miller's thorem and negative feedback

Hello, Just a question of pure theory . Why does the Miller's theorem not account for itself for the decreased output i...
0 comments posted 19yrs
posted by personne
0 comments posted 19yrs posted by personne

Does a dual conversion RX produce dual images?

Does a dual conversion receiver produce dual image frequencies? In other words, after the 1st IF image is removed by th...
13 comments posted 19yrs
posted by billcalley
13 comments posted 19yrs posted by billcalley

Efficieciency

Hello everybody, I am new in here and i am a 6th grader. i wonder if u could help me. U see i have been asked for a cou...
5 comments posted 19yrs
posted by Nadiacider
5 comments posted 19yrs posted by Nadiacider

Another transistor question

Hi, I was trying to understand a NOT gate implementation at the following page: http://www.kpsec.freeuk.com/trancirc.ht...
13 comments posted 19yrs
posted by mentalray
13 comments posted 19yrs posted by mentalray

Philips to acquire Color Kinetics

In order to strengthen strengthen leading position in Led lighting systems, components and technologies Philips acqurie...
0 comments posted 19yrs
posted by harikrishnaup
0 comments posted 19yrs posted by harikrishnaup

will this cause a voltage spike?

I need to interface a relay to an old CNC machine. The machine sends a 24 volt pulse as a signal to operate turrets, in...
10 comments posted 19yrs
posted by etpm
10 comments posted 19yrs posted by etpm

NEED SOME HELP

Hello everyone I'm new to this I just wondering if you guys can help me out. I'm trying to build a circuit but I don't...
1 comments posted 19yrs
posted by lar5
1 comments posted 19yrs posted by lar5