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Universal tester circuit with VCO(voltage controlled oscillator) 23 Aug 2013 | 11:10 pm
A voltage controlled oscillator circuit that called as VCO, is the circuit that use voltage signal level from input to control an amount of frequencies that generate at output or the output frequency ...
Easily create stereo sound 3D. 22 Aug 2013 | 02:42 pm
This is a create special stereo sound circuits. Which sound is a dimension to the listening. Using the some low frequency to appear out the left and right continuously. Interspersed with master freque...
Small stereo amplifier with TDA7052 21 Aug 2013 | 09:23 pm
Small stereo amplifier,low power, less devices, IC TDA7025 is the main equipment. Operation of the circuit, the signal split into left and right through the capacitor coupling of C1, C2 is a variable ...
The telephone pickup small amplifiers using LM358 21 Aug 2013 | 07:38 pm
This circuit is the telephone pickup small amplifiers for To expand the voice conversation louder. or intercepted phone call. It use pickup telephone and LM358 op-amp IC as preamplifier and LM386 out ...
Simple infrared receiver 20 Aug 2013 | 07:23 pm
This is simple infrared receiver for the burglar alarm system or the others protection, etc.It use a few components that there are most common transistors and photodiode is received infrared signal. F...
Fuse failure alarm by 2 LED 19 Aug 2013 | 10:36 pm
The Fuse failue alarm that LED display when the load is low resistors the circuit, fuse blow once. LED1,LED2 show fuse state. Im circuit use a few parts. How it works This circuit will show the perfor...
Simple Moisture Meter by 2N2222 18 Aug 2013 | 08:31 pm
Yesterday I tours an orchard of a friend. He consults about Moisture Meter Circuit. By this circuit uses for level moistness temple of the earth. Fine the value R2 give Meter read the value has 1mA. W...
Electronic VU meter by LM3914 and LM3915 16 Aug 2013 | 08:36 pm
Here is High performance LM3914/LM3915 VU meter projects that widely popular can display with 20 LEDs on stereo or mono with 10 LEDs for all audio system.And can easily build and cheap you must happy ...
Bridge amplifier BCL 18W by TDA2009 16 Aug 2013 | 08:55 am
TDA2009 Ampl BCL (bridge amplifier) 18W ,Supply volt = 23V 2A The TDA2009 be 10 +10W STEREO AMPLIFIER integrated circuits interesting again the one number. We try to bring do the circuit amplifies 18W...
Mouse and insects repellent circuit using IC556 15 Aug 2013 | 07:13 pm
This is a mouse and insects repellent circuit, use high frequency out of the piezo speaker and IC-556 is base as oscillator between 22kHz and 56kHz This projects is safer and more convenient than usin...
