Hobby Electronics Basics

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TO-220 pinout standard?

Is it standard that a TO-220 transistor package is, with the tab up, with the markings facing you, Base, Collector, Emi...
11 comments posted 18yrs
posted by mrdarrett
11 comments posted 18yrs posted by mrdarrett

less current consuming circuit for led lamp

i am working on a project called less current consuming led lamp,and the major idea of this project is less consumtion...
2 comments posted 18yrs
posted by sg858585
2 comments posted 18yrs posted by sg858585

LM1875 on a single supply

I was reading the datasheet for the LM1875 http://www.national.com/ds.cgi/LM/LM1875.pdf and I noticed that they do have...
12 comments posted 18yrs
posted by mrdarrett
12 comments posted 18yrs posted by mrdarrett

Simple audio signal to level convertor?

Hi, I'm looking for a circuit that can read a standard line level audio signal and output a continous voltage 0-5v prop...
11 comments posted 18yrs
posted by kasterborus
11 comments posted 18yrs posted by kasterborus

Dry dead battery

I was charging my battery over the weekend and checked it last night to find the battery dead as a doornail. Upon exami...
22 comments posted 18yrs
posted by rabiticide
22 comments posted 18yrs posted by rabiticide

monitor a distributorless ignition system

I would like to data log commanded spark events for my vehicle. It uses a Distributorless Ignition System which consist...
6 comments posted 18yrs
posted by mike8675309
6 comments posted 18yrs posted by mike8675309

Incandescent Filiment Support Prongs?

Are the filiment support prongs in an ordinary household incandescent light bulb made of Nickel metal or some type of N...
6 comments posted 18yrs
posted by insula
6 comments posted 18yrs posted by insula

Can nichrome be soldered?

Can nichrome be soldered to nichrome? Can nichrome be soldered to copper? insula
7 comments posted 18yrs
posted by insula
7 comments posted 18yrs posted by insula

on winding a transformer

I've got a toroidal core, and I'm planning on winding it with pulsed 12VDC on the primary, and want to get out 50V on t...
11 comments posted 18yrs
posted by mrdarrett
11 comments posted 18yrs posted by mrdarrett

Question about pole frequency in opamp

If i consider an opamp in corrent-to-voltage configuration with: -ideal generetor current in inverting input -non inver...
4 comments posted 18yrs
posted by lionelgreenstreet
4 comments posted 18yrs posted by lionelgreenstreet

CIE?

Hello everyone, Has anyone on this forum taken a course from the "Cleveland Institute of Electronics" (CIE), and if so,...
4 comments posted 18yrs
posted by me
4 comments posted 18yrs posted by me

Sequencers

--Have been googling around to find the little inverter/sequencers for blinking various strings of electroluminescent w...
5 comments posted 18yrs
posted by steamer
5 comments posted 18yrs posted by steamer

Down The Tubes?

I bought a bunch of vacuum tubes from a surplus electronics store that was going out of business, so many of them weren...
18 comments posted 18yrs
posted by ryon
18 comments posted 18yrs posted by ryon

switching

Hello everybody, I have a set of battery, but I only one hooked up to the circuit, The other one act as a backup. I wan...
14 comments posted 18yrs
posted by lilipot
14 comments posted 18yrs posted by lilipot

Outdoor Timer for Pond

I have an outdoor dawn/dusk timer for use outside. My main use has been for Christmas lights, but now I need something...
3 comments posted 18yrs
posted by notvalid2
3 comments posted 18yrs posted by notvalid2