This is the circuit of a modified Heathkit kit. The circuit was found in a Radio Electronics from December 1965. The author of the circuit included improvements to the original circuit.
We find this circuit in an Electronic Design of the 90s. The used integrated circuit admits...
This circuit was originally designed for medical applications and biological experiments. The...
In this circuit of 1987 the player has to briefly press one of the keys trying to hit which LED...