This is a 1 watt mono
amplifier module Kit using the TDA 7052 from Philips. It is designed to be used as a building block in other projects where a battery powered audio amplifier is required to drive a small speaker. It will operate best from 6 – 12 V DC and requires no heatsink for normal use. Two may be used for stereo applications.
Assembly is very straight forward. Make sure you get the integrated circuit and the electrolytic
capacitors the correct way around. The electrolytic capacitors are polarized, they have a
+ or - marked on them and they must be inserted correctly into the PCB. The IC and socket have
a notch at one end, which is marked on the PC board overlay. Solder the socket in place first
before installing the IC itself. Leave the potentiometer until last. If you require fixed gain, you may leave off the spindle.
Amplifier TDA 7052 Circuit
Remember when testing, it will not produce full output for more than a short duration because of
limited heat dissipation. (This will not be a problem for music applications). It will not produce full output with a 4 ohm speaker because of output current limitations, or with DC input less than 6V.
There are only 5 external components. C1 is the input coupling
capacitor, which blocks any DC
that might be present on the input. C2 and C3 provide power supply decoupling, and R2 provides adjustable input level. This can be used as a volume control.