This small 1 W amplifier uses a Motorola integrated circuit from the 1970s. The integrated circuit used is uncommon today and the power supply does not have to be symmetrical.
This transmitter has a good output power thanks to the amplification step with two transistors. The...
We find this circuit in an 80s operational amplifier documentation. The circuit applies to any...
This circuit indicates when the voltage of a 12 V battery is low. With changes, for example, the...