Datasheet of This amplifier uses a pair of complementary transistors at the output and can provide 1 W of audio at a load of 3-ohm. Higher impedance speakers can be used. The circuit is from an English publication from 1986 and TR1 can be a | BC548. The supply can be done with voltages from 9 to 18 V. The trimpot adjusts the resting current, which must be in the order of 20 mA.
The Texas Instruments TPS80 LDO (Low Dropout) series (www.ti.com) can provide output voltages from...
The transistors of this circuit may be general purpose and the power supply comes from the TTL...
Another of the many tachometer circuits we have on our site. This one is from the September 1976...
