This TTL sequential flasher circuit was found in the January 1981 issue of Radio Electronics magazine. It is powered by 5 V. The frequency can be adjusted by R1.
The sensor in this circuit is a BA315 diode. Other diodes can be experimented, but this is one...
The figure shows how to implement the AND function with a Norton LM3900 operational amplifier. The number of...
A single high-power transistor MJ15003 is used in the circuit in the figure to generate strong...