Figure 2 Schematic diagram of wire break ... If using the CD40106, only one gate is needed for the oscillator (Schmitt inputs). An additional gate can be put in series with the memory cell G5 and G6 ...

Input-A is connected to the drain terminal of MOSFET; Input-B to its gate terminal. The source terminal, labeled as Output-C, is the output of the AND gate. The MOSFET in the circuit is either ...

The internal circuit ... NAND gate is hardly the most exciting or exotic of components unless you have a pressing need for a bit of logic glue, so having secured a few we could hook up an LED ...