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Compact 3W BTL Audio Power Amplifier TDA7056 23 Aug 2013 | 05:43 am
Bridge-tied-load (BTL) configuration in an amplifier is basically a H-network with the loud-speaker as the “bridge” between two active valve or switcher. This configuration allow a full alternating c...
Powerline Carrier System Transmitter for Audio (Music/Speech) 15 Jul 2013 | 04:33 am
Power line carrier system is common in home appliances networking. One benefit of using this kind of transmission line is that we don’t have to deal with additional wiring for data or signal communica...
Digitally Controlled Gate for Audio Signals 14 Jun 2013 | 08:48 am
This circuit is equal to digitally controlled analog switch, but it uses transistor instead of integrated circuit. This circuit can be used for frequency range of audio signal 20-20kHz . The output s...
RS Flip-Flop Using OP-AMP 8 May 2013 | 02:33 pm
This RS flip-flop is op-amp version of classic flip-flop which uses two inverting amplifier. The non-iverting input is floating, and we can assume that the voltage level of this floating pin is betwee...
PC (Audio) Signal Generator Using RS232 Port 26 Apr 2013 | 06:24 am
Using an RS232 port, we can generate square wave oscillation when transmitting data, and this can be “misused” as signal generator (square wave generator). This is a PC Signal generator produce a squa...
Tremolo Effect Circuit for Electric Guitar or Other Musical Instruments 14 Mar 2013 | 05:53 am
Tremolo circuit is a kind of sound effect. We can see this type of effect is applied in guitar effect pedals. Tremolo effect is produced if we modulate the amplitude of an audio signal. The shape of...
Voltage Controlled Variable Gain Video Amplifier 5 Feb 2013 | 07:47 am
This is a video amplifier circuit featured with controllable variable gain. The control is done by adjusting the voltage of grid inputs of two FETs, which are configured as programmable voltage divid...
5 A Constant Voltage-Constant Current Regulator 13 Dec 2012 | 11:38 am
A constant voltage constant current (CVCS) regulator doesn’t mean a system with a constant load, since there will be no regulation in such case. What we call CVCS regulator is a regulator with two ...
Fast Charger for Better Lead-Acid Battery Life 20 Nov 2012 | 09:13 am
Compromising between the speed while maintaining safe operation for battery charging is an interesting challenge. This circuit can be used to charge a battery , and it’s safe and rapid. To get quick...
Binaural Synthesizer/Mono to Stereo Converter for Small Speaker/Phones 1 Nov 2012 | 08:21 am
This simple circuit can be used to drive two high-impedance loudspeakers or stereo phones, taking monophonic input (one channel), to produce a stereo signal which spread along the midway between loud...
