This circuit was found in the Linear Applications Handbook of the National Semiconductor of 1994. Some of the components used are not easy to obtain, but equivalents can be used.
This watch was found in 2001 documentation. The watch is powered by 4 batteries. To save energy, the...
This circuit is from Motorola's Linear Databook from 1990. The integrated circuit and transistors are...
This is one of many possible touch switch configurations using CMOS integrated circuits. The...