This circuit generates pulses whose frequency depends on C1. The circuit can be powered by voltages from 5 to 15 V. We find this configuration in a Signetics manual.
This basic configuration aof a touch switch controls a relay. Power supply can be 5, 6 or 12 V...
The transistors in this circuit from an old documentation can be replaced by equivalents like the...
In this source, suggested by National Semiconductor in its Linear Applications Handbook, D1 must...