Clocked Flip Flop 7400 (CB22413E)

This TTL circuit uses 5 NAND gates of 7400 integrated circuits. It must be powered with 5 V.

5 to 12V Voltage Regulator (CB19001E)
This switched or switched regulator was suggested by Texas Instruments in one of its application manuals....
Crystal Oscillator LM339 (CB17186E)
This is one of the possible configurations using the LM139, 239 or 339 voltage comparators. The...
Strobe 7400 (CB22418E)
In the old original version of this circuit from 1989, the LED is common (we recommend 330-ohm...