This logic gate that increases the duration of input pulses was found in a NASA documentation from 1966. Transistors can be replaced with current types.
This experimental AM radio circuit was found in a 1979 English magazine. It can be fitted with a...
This is a variation of the two previous circuits but controlling two LEDs. The brightness of the...
This circuit is the receiver for the CB13997E. The transistor can be the BC548. We also found this...