Hobby Electronics Basics

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Part Search for an oscillator

Hi, anybody know of an oscillator or multivibrator than I can crontrol both frequency and duty cycle. I tried to find a...
6 comments posted 18yrs
posted by lerameur
6 comments posted 18yrs posted by lerameur

Increasing PWM output voltage

Hello, I need to boost a PWM signal at 5KHz and 450mV to 5V at 5KHz and 100mA max. Could someone please give me a list...
12 comments posted 18yrs
posted by davenpete
12 comments posted 18yrs posted by davenpete

Anybody used the TC4432 (30v buffer)

Hi, I am trying to use the TC4432. I am doing the exact circuit of page 7 below. My Vdd is at 1v, and my input is comin...
4 comments posted 18yrs
posted by lerameur
4 comments posted 18yrs posted by lerameur

Power Supply for a LM317

I have a 16 Volt, 4 amp wall I wart to use with a LM317 variable power supply. The LM317 can only handle 1.5 amps, but...
12 comments posted 18yrs
posted by jocar56
12 comments posted 18yrs posted by jocar56

Call For Papers (The 9th ICCCS 2008)

CALL FOR PAPERS The 9th International Conference on Computers, Communications and Systems Daegu University Korea, Novem...
0 comments posted 18yrs
posted by sskwak01
0 comments posted 18yrs posted by sskwak01

Potentiometer for CMoy Headphone Amp

I'm building a headphone amp based on the simple CMoy design. I want to add a variable gain and the design shows adding...
5 comments posted 18yrs
posted by nigel
5 comments posted 18yrs posted by nigel

Adjusting frequency NE556

Hi, The following is a PDF of a motor control kit... http://www.electronickits.com/kit/complete/motor/ck1400.pdf Curren...
13 comments posted 18yrs
posted by davenpete
13 comments posted 18yrs posted by davenpete

Driving LCD 7-seg passive displays with PIC

I have a passive LCD with 8 7-seg digits plus point and some other symbol. It has 23 connections. I wish to drive it wi...
1 comments posted 18yrs
posted by cyberbige
1 comments posted 18yrs posted by cyberbige

Help finding phase angle

I'd appreciate some help with this equation... I've been looking at it for a few days now... Here's the equation: http:...
3 comments posted 18yrs
posted by davidd31415
3 comments posted 18yrs posted by davidd31415

value of Lab-Volt power supply

I have an ac/dc power supply with a DC and a VOM meter. It's fairly large with 3 units stacked together. I couldn't find...
8 comments posted 18yrs
posted by rjv494
8 comments posted 18yrs posted by rjv494

LED Matrix Questions

Hiya folks. I got into electronics mostly as a result of messing with digital components, so unfortunately I still find...
4 comments posted 18yrs
posted by fyberoptic
4 comments posted 18yrs posted by fyberoptic

this is not basics

Hi Group, If one is a bit thick how do I start in electronics. Micky
7 comments posted 18yrs
posted by excaliber333
7 comments posted 18yrs posted by excaliber333

Using a Panel Meter movement

Hello All, I'm trying to sort out how to use an analog, needle-style, coild&spring type of panel meter movement. I have...
13 comments posted 18yrs
posted by test
13 comments posted 18yrs posted by test

Inverter performance

Hello, I made two inverter circuit: http://www3.sympatico.ca/captoro/inverter.gif My goal is to have about 33-33v in th...
7 comments posted 18yrs
posted by lerameur
7 comments posted 18yrs posted by lerameur

EM pulse detection

EM pulse detection Is it possible to measure with great precision the time at which a very short EM pulse reaches a rec...
8 comments posted 18yrs
posted by mluttgens
8 comments posted 18yrs posted by mluttgens