10 channel graphic audio equalizer circuit with ic tl074

Amplifier circuit equivalent O assumed input of the circuit plus two equal and opposite polarity signals (differential mode signal). The two tube collector current Ic, and IC7

This subwoofer active filter circuit is a 24 dB octave filter with a Bessel character and cutoff frequency of 200 Hz. So, if you are interested in experimenting with audio circuits in subwoofer range, this circuit is for you. In subwoofer range, all audio frequencies below 200 Hz can be...

Here is a hobby circuit of a multi channel remote control system, by which you can control 8 different appliances. The main sections of this multi channel remote control circuit are the RF receiver and transmitter. By using this circuit we can control 8 devices, each of them independently by...

When I first built the Heart rate measurement through fingertip project, the infrared LED and photodiode used for finger photoplethysmography were actually from salvaged parts, and therefore, I could not provide specifications for them in the article. As a result of that it takes quite a bit of.

I don`t the right place to post this but I`ll try my luck here: I`m looking to build a timer for a pump. I want the pump to run for 5 minutes, then..