This circuit provides a few watts of output and can be used in the car as an auxiliary amplifier. Transistors must be mounted on heatsinks and the speaker can be 4 ohms or 8 ohms.
Found in old National Semiconductor documentation, this indicator uses an integrated circuit from...
Other amplifiers of the series like the MC3301, MC3401 and LM2900 can be used in this circuit. We found...
The microwave sensor of this circuit is a common ceramic capacitor. The circuit is from an 80's...