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making a spectrum analyser - how to?

i want to make a spectrum analyser about 7 band, maybe 10 led's ber band/bar. what would be a simple way of doing it ja...
3 comments posted 20yrs
posted by amstereo
3 comments posted 20yrs posted by amstereo

Jaycar SMD 3.5mm switched stereo jack socket.

Jaycar #PS-0140 (little green thing). Anyone sitting on around 250pcs ?. Jaycar have run out, do not intend to restock...
0 comments posted 20yrs
posted by moby
0 comments posted 20yrs posted by moby

advice needed: simple baud rate conversion

Hello, I have a simple application that requires interfacing a device which tx data at 9600 baud, and another device th...
8 comments posted 20yrs
posted by giannis.greg
8 comments posted 20yrs posted by giannis.greg

Cheap Proximity Access Control

I have been searching for a cheap proximity access control system for my house and garage. I would like to use those li...
4 comments posted 20yrs
posted by dgholt
4 comments posted 20yrs posted by dgholt

ferris radios

im looking for a circuit for a ferris m94 car radio. sound is distorted. thanks ppl
1 comments posted 20yrs
posted by dingding
1 comments posted 20yrs posted by dingding

HDTV

Before I buy my next whizz-bang T.V. there are some very basic questions I would like to ask, and believe me, the local...
18 comments posted 20yrs
posted by tonyt92
18 comments posted 20yrs posted by tonyt92

scr

What does the Ifsm rating of an scr mean?
14 comments posted 20yrs
posted by pmhughes
14 comments posted 20yrs posted by pmhughes

Toyota Corolla key fob bleeper

Does anyone know what is in these devices, what the power source is and most importantly, how to get into the little su...
11 comments posted 20yrs
posted by moby
11 comments posted 20yrs posted by moby

DSE Q1803 $128 CRO

Hi to all, Picked up one of these 10MHz, single beam CROs from my local DSE store last Tuesday - there were none on dis...
43 comments posted 20yrs
posted by philallison
43 comments posted 20yrs posted by philallison

F&P Smartdrive codes

Hi, I've got an F&P Smartdrive 500, After power on it is silent for about 20 seconds then beeps once every second with...
6 comments posted 20yrs
posted by chrism
6 comments posted 20yrs posted by chrism

Help Technics Amp.

looking for a circuit for a Technics amp. model SU-X990D not available from hcsd , panasonic or GB.
0 comments posted 20yrs
posted by maxh10
0 comments posted 20yrs posted by maxh10

Hitachi T.V. diagnostics?

Can anybody tell me if there is an onboard diagnostics function on a Hitachi C29-F350B television and how to access it i...
8 comments posted 20yrs
posted by dunstert
8 comments posted 20yrs posted by dunstert