This 1965 Philips circuit uses old company transistors like the BFY51 and BFY50. The circuit is powered by 12 V and the power gain is 8.9 dB.
Originally suggested by Harris in the 1990s, this circuit uses an optical tachometer. The circuit is...
The two power steps below are intended for use with the SAA1027 stepper motor control but can be...
The purpose of this circuit is to emit infrared pulses. However, LEDs for visible light can also...