The following diagram is 16W audio amplifier circuit. The circuit built based 2 pieces of power IC LM383 in bridge connection, so this amplifier is an bridge amplifier. This is an old amplifier, LM383 is discontinued, so this LM383 might be difficult to find. You can use ECG1232, TDA2002 or TDA2003 as the replace for… Read More »
This is a simple 20W bridge amplifier based on TDA7240A. This circuit is designed for car audio system, but you may use this circuit for your small home audio application… 🙂 . Schematic Diagram: This circuit operated with 18VDC asymmetrical power supply (positive (+) and ground only). Mount the power IC on a heatsink to… Read More »
Here is the circuit diagram of 4 x 35W quad bridge amplifier. This is a power amplifier that has four input channels and four output channels or commonly called the quad amplifier. Power amplifier is designed specifically for car audio system applications. With a fairly large output power per channel, low distortion and low output… Read More »
This is a 20W Hi-Fi power amplifier circuit build based on single power amplifier IC TDA2040. The single TDA2040 has able to deliver 20W power output. The bridge amplifier which consist of double TDA2040 can deliver 30W power output (8 ohm loudspeaker). About power amplifier IC TDA2040: The TDA2040 is a monolithic integrated circuit in… Read More »
This is a stereo audio amplifier circuit which will deliver 12W audio power output on each channel. This circuit built based on single IC TDA1521 or TDA1521Q, supported with a few external components. General purpose power supply can be used to operate this amplifier circuit, recommended voltage: 24VDC (asymmetrical). The TDA1521/TDA1521Q is a dual hi-fi… Read More »
This is a great audio amplifier circuit based on single power IC TDA7294. TDA7294 is intended for use as a high quality audio class AB amplifier in hi-fi applications. It has very low noise and distortion, wide bandwidth and good output current capability, enabling it to supply high power into both 4Ω and 8Ω loads.… Read More »
Here the circuit diagram of 22W stereo power amplifier. Powered with main power IC TDA1554Q, this circuit works up to 22W for each channel. For stereo channel, the power output should be up to 2 x 22W . A few externel components required to support the main component. Heatsink on the power IC is a… Read More »
This is a low noise and distortion pre-amplifier and tone control circuit in one module. Using a special IC TDA1524A, this simple circuit is easy to build and will drive most of power amplifier. Schematic diagram:
This is 2x1W stereo amplifier circuit based on single IC KA2209. IC KA2209 is an equivalent IC to the TDA2822, you can use TDA2822 if you can’t find KA2209. It is ideal for battery powered operation since the supply required for this circuit is 2V to 9VDC. Power output depends critically on speaker resistance &… Read More »