Hobby Electronics Basics

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High Voltage OP AMP needed

Hi, Im looking for an OPAMP which can deliver +/- 60 V (120 V nom) or more in the 1 kHz range. No significant current t...
13 comments posted 19yrs
posted by casper.pub
13 comments posted 19yrs posted by casper.pub

CA 3082 alternatives

Are there any alternatives for the transistor array chip CA 3082 which is now obsolete. R
7 comments posted 19yrs
posted by dewhurst
7 comments posted 19yrs posted by dewhurst

Beginner question on resistance

First of all let me once again say thanks for all the good advice I get here. I know a lot of this stuff is so basic fo...
3 comments posted 19yrs
posted by spammenot
3 comments posted 19yrs posted by spammenot

Design Help Needed

Hi All, I am making a usb device to control a ceiling fan from a computer. I already have the following components: - f...
28 comments posted 19yrs
posted by gecono
28 comments posted 19yrs posted by gecono

Waveguide

I want to feed a single pulse of, let us say, 10 to 100 microseconds duration, into a short length of waveguide and det...
12 comments posted 19yrs
posted by dewhurst
12 comments posted 19yrs posted by dewhurst

chassis ground definition

I am view this circuit drawing with this symbol in various places: http://upload.wikimedia.org/wikipedia/commons/thumb/...
1 comments posted 19yrs
posted by kielvereecken
1 comments posted 19yrs posted by kielvereecken

Timed on/off switch

Hi, this is my first post here, and I looking for either a component or a circuit design for a special project I am doi...
19 comments posted 19yrs
posted by kielvereecken
19 comments posted 19yrs posted by kielvereecken

Using both 2000 and 2200 mAh batteries together

Is there any problem recharging 2000 and 2200 mAh batteries alongside each other? I have a battery that charges two at...
5 comments posted 19yrs
posted by nicholascrawford
5 comments posted 19yrs posted by nicholascrawford

mystery software (?) death

hello, I was wondering if anyone had ever encountered something like my latest joy. summary: unit stops working, yet wh...
4 comments posted 19yrs
posted by rnlbel4me
4 comments posted 19yrs posted by rnlbel4me

measuring peak voltage

hi there, we have a batch of voltage regulators for motorcycles which are meant to regulate the battery charging voltag...
16 comments posted 19yrs
posted by NA
16 comments posted 19yrs posted by NA

Solar panel/led

Can anyone tell me if it's possible to power leds directly from a solar panel? I need the light there and then, and not...
10 comments posted 19yrs
posted by stuart_noble
10 comments posted 19yrs posted by stuart_noble

Voltage Regulator/ Voltage Reference

Im trying to create a +/- 2.5V supply from a +/-5V. I have a couple of 2.5V voltage references. Am I right in assuming...
4 comments posted 19yrs
posted by graeme.cunningham
4 comments posted 19yrs posted by graeme.cunningham

servo control via lpt problems

Hi all i am working on a small project in VB, Controlling Servos by voice. everything is working great except for one t...
3 comments posted 19yrs
posted by mpick0658
3 comments posted 19yrs posted by mpick0658

Prevent signal when device is turned on

I have one of the output pins of a 16F84A hooked up to a transistor which in turn drives a relay. Though the software c...
10 comments posted 19yrs
posted by grubertm
10 comments posted 19yrs posted by grubertm