An interesting solution for fast communication systems, warning of operation, amplification of alarm signals, digital recorders, etc. is the amplifier shown in figure 1. It is based on the TDA 7052 circuit which provides close to 1 W with 6 V supply and needs only one resistor and two external capacitors.
For coupling to the external circuit it is interesting to use a capacitor of 100 nF to 10 μF depending on the signal source. Capacitors C1 and C2 should be mounted as close as possible to the power pins.
The loudspeaker can be of any size type with the impedances in the range indicated in the diagram.
The printed circuit board for mounting this amplifier stage is in Figure 2.
Material list
CI-1 - TDA7052 - amplifier, integrated circuit
R1 - 4.7 k ohm x 1/8 W - resistor
C1 - 100 nF - ceramic capacitor
C2 - 220 uF x 6 V - electrolytic capacitor
Several:
Printed circuit board, wires, solder, etc.
