This interface shield circuit is from the 1983 Intersil Databook. The components used are uncommon today. ADCs are low-cost digital converters. The power source voltage must be 5 V.
This circuit uses a NAND port to convert rectangular signals from 50 kHz to 1 MHz into triangular...
This circuit activates a relay producing pulses at regular intervals adjusted by the...
This oscillator is indicated for the adjustment of FI of FM radios, having its frequency...