Found in an Elektor from the 90s, this TTL circuit can be used as a shield without any bouncing problems. The circuit must be powered with 5 V.
This circuit produces a loud sound in the speaker when water level reaches the sensor. The power...
May 2016 - It can be obtained from Mouser Electronics new display 1092 from VDC. The new LED...
This Motorola circuit is from 1965. Collector currents must be 7 and 12 A for transistors....