Hobby Electronics Basics

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op amp inputs

for example, LM324 http://www.st.com/stonline/books/pdf/docs/4797.pdf the data sheet states a differential voltage of a...
16 comments posted 19yrs
posted by nospam
16 comments posted 19yrs posted by nospam

Wiring 555 Timer as Signal Flasher Honda CT90?

Hi Folks: I need a bit of help. I want to use a 555 or similar timer to activate my signal lights on my trail bike. Why...
5 comments posted 19yrs
posted by gerryo
5 comments posted 19yrs posted by gerryo

bandpass filter

I'm trying to simulate pulse transmitted through bandpass filter (actually ,it is APD that has band pass type frequency...
0 comments posted 19yrs
posted by sperelat
0 comments posted 19yrs posted by sperelat

need some help

im a student in 2nd year of engineering(communication & electronics)...i need to have more information about electronic...
4 comments posted 19yrs
posted by ebowaves
4 comments posted 19yrs posted by ebowaves

A circuit for regulating a Silicone Heater Mat

Hello all, I am very new to electronics and need to build a simple 12V dc circuit, which will keep a heater mat at a fi...
4 comments posted 19yrs
posted by aesbrown
4 comments posted 19yrs posted by aesbrown

A basic USB oscilloscope

Hai, I just received the USB osciloscop I ordered and it is a nice, basic, scope. You can check the specifications on :...
9 comments posted 19yrs
posted by matthijsfh
9 comments posted 19yrs posted by matthijsfh

TDS 1002 to read high voltage

Hello, Anybody know if it is possible to read 5000v pulses on a digital scope, the TDS 1002 from Tektronic. I have this...
8 comments posted 19yrs
posted by lerameur
8 comments posted 19yrs posted by lerameur

Capacitor size

Hi, I have a simple circuit with a PICAXE that controls a relay board, when the relay board is empty it works fine. But...
9 comments posted 19yrs
posted by nospam
9 comments posted 19yrs posted by nospam

Simle LED driver

Hi, I have a simple 555 delayed timer and I wish to light up a LED when the timer starts and a relay off. At the end of...
7 comments posted 19yrs
posted by allenbsf6502
7 comments posted 19yrs posted by allenbsf6502

Can all DC motors be reversed?

Can all DC motor leads be reversed so the motor runs in the other direction equally well? I have a 36 V DeWalt cordless...
9 comments posted 19yrs
posted by jdoe
9 comments posted 19yrs posted by jdoe

Question about transistor

In the diagram below: 3V | ---------- NPN LED --- - from my electronics learning kit, the NPN is in parallel with the l...
22 comments posted 19yrs
posted by jgrace5
22 comments posted 19yrs posted by jgrace5

what project should i choose!!!!

hi, all fris I will make my final year project, i have no idea what title i should choose and what ckt is useful?????
3 comments posted 19yrs
posted by polian22
3 comments posted 19yrs posted by polian22

Simple Linear Supply (for teaching my son)

I picked up a few 16VACrms, 1Amp transformers from a junk table at a local supermarket store (I think they are used for...
16 comments posted 19yrs
posted by jkirwan
16 comments posted 19yrs posted by jkirwan

audio amplifier voltage

Let's say I've got some 4-ohm speakers that are advertised to take up to 400W. Let's also say I want to build a 200W au...
5 comments posted 19yrs
posted by mrdarrett
5 comments posted 19yrs posted by mrdarrett