We found this circuit in the May 1972 issue of Radio Electronics magazine. Its purpose is to teach logic using integrated circuits of the TTL family. The 5 V power supply is included.
The circuit in the figure causes an incandescent lamp to flash at a speed determined by the...
The voltage gain of the circuit shown in the figure is 10 times. This gain is given by the ratio...
This preamp version uses BC109 transistors that are older versions of the current BC549 in plastic...