This circuit operates at a voltage of 1.3 V from a single mercury cell. We found in an old documentation and for the components used the frequency is 500 kHz.
Mouser Electronics has in stock the Texas Instruments TPS7A90 Low Voltage Dropout (LDO) Linear...
The purpose of the circuit shown in the figure is to open and close the contacts of a relay...
June 2017 - The new touch switches C & K KXT series can now be obtained from Mouser Electronics. These...