This circuit can be used to obtain a zener voltage from a common zener of another value, adjusting in a multimeter. The circuit is from an American documentation of the 1970s.
This 9-bit DAC circuit was found in the RCA CMOS integrated circuits manual of the 1970s. The...
A NOR gate can be improvised using one NAND gate of a 4011 as shown here. The diodes are...
Found in na 1980’s English magazine, this circuit produces a strong modulated tone reproduced on a...