There are many cases where you
desperately need a simple to build and
inexpensive amplifier that delivers
moderate power. Here it is. This
compact amplifier delivers just enough
power output so that you can hear the
audio signal coming from any device.
It delivers up to 2.5 watts audio output.
Formula for P
P=Vb2/8RI
where Vb= actual supply voltage
and RI= actual speaker
impedance.
The heart of the amplifier is a single compact IC which makes the circuit simple
to build and eventually troubleshoot. The IC used in this circuit is a TCA160 which
integrates a full-amplifier circuit including preamp and driver stages. The supply
voltage range is flexible from 6V up to a maximum of 14V. The IC is normally
heatsinked to avoid being damaged from overheating.
The actual power output of the IC depends on both the supply voltage and the
speaker's impedance. It can be found using the formula shown in the preceding
page.
Printed Circuit Layout
Parts Placement Layout
External Wiring Layout
Electronic Circuits volume 1.0 - Circuit Nr. 1
The complete data of the electronic circuit described above can be found in the following book and is available from Amazon.com.
