I found an unnecessary circuit board from a TV. The TDA203A microcircuit caught my eye. I know that TDA brand microcircuits are low frequency amplifiers, there is a lot of information about them on the Internet. I decided to build my own simple amplifier according to the scheme:
Needed for assembly
- Chip TDA2030A.
- Capacitors 0.1 uF - 3 pieces.
- Capacitors 2200 uF 25 V - 2 pieces.
- Resistor 2.2 Ohm.
- Resistors 22 kOhm - 2 pieces.
- Resistor 680ohm.
- Capacitor 22 uF 25 V.
- 4.7 µF film capacitor.
- Housing, switch, wires, radiator, connectors for tulips.
Assembling a simple amplifier on TDA2030
My goal was to create an amplifier without spending a lot of money on it. I found all the parts except the housing in various old boards that were not needed naturally.
You can assemble an amplifier on a TDA2030 using different methods and solutions; in this case, I will use wall-mounted installation. Since many pins are connected to ground, I recommend making a branching wire.
Next we proceed to soldering the connections.
The microcircuit pins are counted from left to right, with the markings and pins directed towards you.
After you have assembled the circuit, we check it. Let's connect the speaker and test the amplifier at low volume.
If everything works, we proceed to the next stage.
I had a ready-made body. It is better to take the radiator outside for better cooling of its surface. Otherwise, overheating may occur in the case.
Attach the radiator, connectors, bring out the power wires, and install the power switch.
- Supply voltage - from ±4.5 to ±25 V.
- Output power - 18 W.
- Nominal frequency range - 20-80,000 Hz.
Almost all such microcircuits get very hot and therefore will not work for a long time without a heatsink.
This is a truly incredibly simple circuit that even novice radio amateurs can assemble. With all this, it has decent characteristics for its minimal size.
Collect your amplifier and you will be happy, friends.
