Hobby Electronics Basics

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mains outlet - only 80 volts!?! why ? (Australia)

Got a problem here .... just wondered what people might hypothesis could be wrong. One of the dual power outlets in the...
14 comments posted 20yrs
posted by aheyn
14 comments posted 20yrs posted by aheyn

Some VLSI theory questions

With exams coming up, the pressure is one. If someone can answer thesequestion would be great. 1. Does the top metal la...
1 comments posted 20yrs
posted by confusedstudent001
1 comments posted 20yrs posted by confusedstudent001

what's new in MINO-OFDM?

hi, all. As i am doing some work on mimo, i think maybe i can do some research on mimo-ofdm field. But i really do not...
3 comments posted 20yrs
posted by ddznq
3 comments posted 20yrs posted by ddznq

Audio pitch adjustment circuit

I want to take an 8 ohm, mono, audio signal that could be as high as 3 watts, and input it into a circuit that would al...
4 comments posted 20yrs
posted by 1qazse4
4 comments posted 20yrs posted by 1qazse4

Crystal Radio Pre-Amp

Is that what you would call a device that takes the signal directly from the antenna before passing it on the the rest...
7 comments posted 20yrs
posted by james.douglas
7 comments posted 20yrs posted by james.douglas

Simple circuit to generate 12VDC from a 9v battery?

Hello everyone, I need to generate 12vdc from a 9v square battery, cheaply and simply, supplying about 20mA. I have loo...
14 comments posted 20yrs
posted by royalmp2001
14 comments posted 20yrs posted by royalmp2001

Soldering iron questions

I am looking at the Weller soldering stations and was wondering if someone could answer some questions for me. First, o...
6 comments posted 20yrs
posted by 1qazse4
6 comments posted 20yrs posted by 1qazse4

isolating RS-485 suggestions

I've found a few basic ways to do this: 1) Use a standard non-isolated RS-485 transceiver, and isolate the data/control...
2 comments posted 20yrs
posted by none
2 comments posted 20yrs posted by none

Need Help

Anyone have schematic diagram for Polytron Minimax TV serial 20323 please help me, tahk's so much!!
2 comments posted 20yrs
posted by h4sbr
2 comments posted 20yrs posted by h4sbr

Help Needed Finding Parts

I apologize if this is off-topic/against the channel rules. I need to locate a good source for the following. I tried p...
1 comments posted 20yrs
posted by fergusonjason
1 comments posted 20yrs posted by fergusonjason

Bad design?

Is this a bad design: I have 5 connections (switches on a X10 mini home controller) that either need to get shorted wit...
3 comments posted 20yrs
posted by N
3 comments posted 20yrs posted by N

Single Serial to multiple Serial transfer using 8051

I have been assigned a project to make a system wherein there are three 8051 microcontrollers and their serial interfac...
0 comments posted 20yrs
posted by anupamchomal
0 comments posted 20yrs posted by anupamchomal

SCR question

Hi, Bit of a dumb question here..... Not having much luck with circuits triggering SCR's. What I want to do is trigger...
11 comments posted 20yrs
posted by jst3712
11 comments posted 20yrs posted by jst3712

AM modulation index

Hi, I'm a software engineer and not really comfortable with electronics. May be some of you could help me with the foll...
83 comments posted 20yrs
posted by Rutger
83 comments posted 20yrs posted by Rutger