Passive volume control with Potentiometer
Volume control circuit for speaker 4 ohm or 8 ohm located in the another room far away. by using only passive components. This gives limited control and helps reduce volume when a conversation starts. The...
Category: Hobby-Circuits
Simple Digital Event Counter
The basic digital circuits are Flip Flop and Counter, both are here. This circuit can be cascaded to make even a 6 digit event counter, even a simple frequency counter can be made. These...
Desoldering Methods
Dear Solderman, i hope you know how to dessolder a wave soldered component from a board. There is problem because the pins are two face soldered. – thanks mail from JS Sending a few...
LED Voltage Level Indicator
This circuit is derived from a Siemens Application Note 1974. This circuit uses common components of today. The circuit is here as it is of high educational value. I have not tested it. You...
Constant Current Source for LED
This article will explain the way a simple transistor based current source is designed, this will give an idea on how some components can be used in a practical way to make the circuit...
Graphic Equalizer Circuits
plz send me sound equalizer circuits. – email by AH …. In the graphic equalizer, the input signal is sent to a bank of filters. Each filter passes the portion of the signal present...
Make an Encoder for your Bot
I want to build a cheap wheel encoder by myself. – Need some help here. I want to build a cheap wheel encoder by myself. Now, my idea was to use a photodiode and...
