This circuit is from the 1990 Motorola Data Databook. The circuit can be implemented with equivalent transistors. The power supply must be symmetrical.
The figure shows how to implement an alarm buzzer in an LM3914 to warn about crossing the scale...
Found in the July 1994 Electronics Now magazine, this circuit drives a relay up to 12 V depending on...
May 2017 - Mouser Electronics is delivering a voice recognition kit from NXP Semiconductors. The...