Hobby Electronics Basics

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Numerical Question

This is a simple question from microelectronics by sedra smith 5e page 143. But i am not clear how they calculate it. k...
3 comments posted 20yrs
posted by h.irfan
3 comments posted 20yrs posted by h.irfan

Conduction Angle

What is conduction angle and how can we measure it. I am using Microelectronics by Sedra Smith 5e. I am not clear about...
1 comments posted 20yrs
posted by h.irfan
1 comments posted 20yrs posted by h.irfan

removing "hum" from an audio recording

I'm sure you've come across this before. We had to tape-record a meeting (with real cassette tapes!) yesterday. I was p...
36 comments posted 20yrs
posted by mrdarrett
36 comments posted 20yrs posted by mrdarrett

1st post - what kind of filters?

Hi all, first post here. I'm analyzing a circuit coming from a synthesizer but I wasn't able to determine a thing: if y...
8 comments posted 20yrs
posted by faxiomas
8 comments posted 20yrs posted by faxiomas

Operating a parallel in / serial out shift register

Hi all, I'm trying to get a 74hc165 to work.(datasheet: http://www.farnell.com/datasheets/72353.pdf). I'm operating it...
6 comments posted 20yrs
posted by diederickh
6 comments posted 20yrs posted by diederickh

Solar Powered PIC

Hi all.. Sorry this is maybe a bit long winded. I'm Just gathering thoughts together for a project that has family conn...
6 comments posted 20yrs
posted by someone
6 comments posted 20yrs posted by someone

Wht is 7400 series and 741 ?

In exame my sir asked me why in logic gates IC no. Starts with 74 , not 12 or 23 or somthing like that? Plese give me an...
8 comments posted 20yrs
posted by wazdesign
8 comments posted 20yrs posted by wazdesign

Detecting Multiple Switches Remotely

Hi, I have 6 switches that I need to know whether it is on or off remotely - 30 meters away. The ON state is +12V and t...
11 comments posted 20yrs
posted by pstiady
11 comments posted 20yrs posted by pstiady

DIGITAL SPEEDOMETER

I want to make a digital speedometer. Concept is to measure the rpm of the wheel for say 5 sec. the revolutions will be...
4 comments posted 20yrs
posted by prateekprashar2003
4 comments posted 20yrs posted by prateekprashar2003

Help: SCR voltage drop

OK fine folks, here's the dilemma: I'm making a sound trigger that fires a camera. A timer is used to turn the trigger...
3 comments posted 20yrs
posted by gfight
3 comments posted 20yrs posted by gfight

ADC/DAC

I need high speed (around 100MSPS) ADC and DACs, these should be interfaced with any Microcontroller or DSP for Broadban...
1 comments posted 20yrs
posted by gajendraph
1 comments posted 20yrs posted by gajendraph

PCs plugged into power strip into ungrounded GFCI?

This is an electronics basic noob question to be sure. I'm moving into a place that only has two pronged (presumably un...
14 comments posted 20yrs
posted by 0.jim.meyer.0
14 comments posted 20yrs posted by 0.jim.meyer.0

Gaussmeter - hall-effect sensors

My gaussmeter project is moving along. I dropped the multimeter idea and I'm doing one with a PIC. It reads the voltage...
5 comments posted 20yrs
posted by a
5 comments posted 20yrs posted by a