Monthly Archives: May 2010

3 Band Graphic Equalizer

Posted on May 30, 2010 by Rust
3 Band Equalizer

Below is a classic circuit of regulation of tone of three way. With this circuit, we can regulate low, mid and high frequencies of acoustic signal. We can regulate the boost/cut in the range of +- 18 dB/oct. The supply … Continue reading →

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Single Cell LED Flashlight

Posted on May 24, 2010 by Rend
Single Cell LED Flashlight

This is Single Cell LED Flashlight circuit. This circuit uses white LED that has best power-efficiency combination at about 20mA and requires abut 3.3V. Each Led in this circuit draws power about 66mW. This circuit uses seven LEDs. This circuit … Continue reading →

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Music/Sound Controlled Disco Light

Posted on May 20, 2010 by Rust
Music-Sound-Controlled-Disco-Light

The mains supply can be conveniently reduced with no heat dissipation by the reactance of C1; then rectified by D1 (1N4007) and D2 (1N4007) and clamped to 24V by the Zener Diode D3 (24V) due to the very low current … Continue reading →

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