Hobby Electronics Basics

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Wiring Batteries Together

If I wire three 12 volt batteries together in series to get a 36 volt pack and they are all rated at 10 Ah each, then w...
4 comments posted 17yrs
posted by frew
4 comments posted 17yrs posted by frew

How does this oscillator work?

I have come across a design for an oscillator that, boiled down to its essentials, has a configuration like this: ,---...
5 comments posted 17yrs
posted by greg
5 comments posted 17yrs posted by greg

timing circuits hel please

I need a control circuit to control 3 relays this is what I won't to happen a push to make switch is closed relay 1 clo...
4 comments posted 17yrs
posted by andrew
4 comments posted 17yrs posted by andrew

B&K Precision Model 4011 Function Generator Price?

I have the Subject device, and am thinking about selling it. I bought it 9 years ago, and doubt that I even plugged it...
7 comments posted 17yrs
posted by wolftracks
7 comments posted 17yrs posted by wolftracks

Bio Sensors

Is there any equipment to moniter blood pressure or a human parameter in bio sensors
4 comments posted 17yrs
posted by bharath026
4 comments posted 17yrs posted by bharath026

Rectification Quotient Sync Filter

Rectify both the signal and the ref along with their noise components _then_ divide. Since there are no humps from mult...
22 comments posted 17yrs
posted by BretCahill
22 comments posted 17yrs posted by BretCahill

Cheap trimmer adjustment tool

aka trimmer alignment tool. Looking for the flat head type used for adjusting pots. Cheapest I've seen is $.70, anyone s...
7 comments posted 17yrs
posted by oparr
7 comments posted 17yrs posted by oparr

Electro-Magnetic Pulse

This guy was on C-span Books today. Fascinating concept, It is Semi Fiction. EMP is real, the story is fiction, set 1 s...
1 comments posted 17yrs
posted by willholcomb.securefuture
1 comments posted 17yrs posted by willholcomb.securefuture

Quotient Sync Filter Better Than Lock In

A lock in amplifier multiplies an AC signal + noise by a synchronous reference signal. If the signal is sinwt and the r...
42 comments posted 17yrs
posted by BretCahill
42 comments posted 17yrs posted by BretCahill

IC Data Catalogs

Hello! Sorry if this has already been asked ad naseum, but here goes. When i was a little, my father used to have these...
11 comments posted 17yrs
posted by harrytuttle777
11 comments posted 17yrs posted by harrytuttle777

Missing Group?

Anybody know why the "Deacticated" the Communications Units Group on Google?
2 comments posted 17yrs
posted by willholcomb.securefuture
2 comments posted 17yrs posted by willholcomb.securefuture

native cad file in ASCII

Dear all I have developed a binary circuit using ultiboard and how can i generate Gerber files and native cad file in A...
1 comments posted 17yrs
posted by josegidayfin
1 comments posted 17yrs posted by josegidayfin

power losses across inductive chokes

The DC component losses from I^2 * R end up as heat in a choke. I've received some mixed signals about the AC reactance...
12 comments posted 17yrs
posted by air_bits
12 comments posted 17yrs posted by air_bits