This circuit was obtained from Linear Technology documentation from the 80's. Powered by 5 V it can be used as a shield. The components are from the era.
This is one of the many hysteresis comparator circuits the reader may find in this section and on this...
The 4047 is a monostable/astable CMOS multivibrator. The basic con- figuration is triggered by the...
This circuit uses a sensitive reed relay to control external loads. The time delay is given by the...