Flashy christmas light

LED light flasher

This is a very basic circuit for flashing one or more LEDS and also to alternately flash one or more LEDs. It uses a 555 timer setup as an ... Baca selengkapnya »

Just a minute scoring board circuit

You can use this circuit for quiz contests wherein any participant who presses his button (switch) before the other contestants, gets the f... Baca selengkapnya »

Gate Alarm Circuit

Image Description: Figure 1 represents a cheap and simple Gate Alarm, that is intended to run off a small universal AC-DC power supply . Fig... Baca selengkapnya »

Graphic Equalizer 3 Band

Very simple and cheap 3 band Equlizer for your home made sound system :D Baca selengkapnya »

Vinyl Pre-Amplifier

This is old pre amplifier circuit, but still...this is very good and cheap analog circuit... 1) A moving magnet pick-up cartridge is an indu... Baca selengkapnya »

MP3 Car Amplifier 150 Watts

This car amplifier schematics is quite simple and cheap for car audio system. For complete tutorial and schematics, please go to this page Baca selengkapnya »

Amplifier 24 Watts Class A

This is very good and low cost Amplifier for your medium indoor sound system. A 24 Watt Class A Amplifier made from discrete semiconductors,... Baca selengkapnya »

Simple Line Mixer and Patchbay

Here the finished circuit include the box: And here the schematic diagram: Baca selengkapnya »

100 to 150 Watt Amp

Amplifier Schematics: Power Supply Schematics: Baca selengkapnya »

Peak Reading Audio Level Meter

This simple circuit will indicate peak audio response on an analogue meter, similar to a tape recorders meter. The circuit uses an opamp as... Baca selengkapnya »

Hi-Fi Pre Amplifier

It has an exceptionally fast high frequency response, as demonstrated by applying an 100kHz squarewave to the input. Baca selengkapnya »

Doorphone Intercom

In this doorphone circuit , an 8 ohm speaker is used both as a microphone and also an output device. The BC109C stage amplifies in common ba... Baca selengkapnya »

Microphone for Computer

This circuit was submitted by Lazar Pancic from Yugoslavia. The sound card for a PC generally has a microphone input, speaker output and som... Baca selengkapnya »

6 Input Mixer Schematics

The mixer circuit below has 3 line inputs and 3 mic inputs. The mic inputs are suitable for low impedance 200-1000R dynamic microphones. An... Baca selengkapnya »

Audio Notch Meter

Nice notch meter for your audio device. At first glance this circuit looks fairly complex, but when broken down, can be divided into high pa... Baca selengkapnya »

8 Watt Amplifier

Actually, the TDA2030 can deliver 20 watts of output power, but the output power reduced to about 8 watts to supply 10 watt speakers. Inpu... Baca selengkapnya »