CD4046 Micropower Phase-Locked Loop L7912 - VOLTAGE REGULATOR (-12V -1A) using this type of sockets

using this type of sockets will be advantageous

Black: - Excitation

how many batteries is not affected

or if you simply need to sense the presence of an object by measuring strain or load applied to a surface

Voltage-Controlled Oscillator and two Phase Comparators

CD4046 Micropower Phase-Locked Loop L7912 - VOLTAGE REGULATOR (-12V -1A) using this type of socketsIntroduction : CD4046 Micropower Phase Locked Loop Features : Consisting of a Linear, Voltage Controlled Oscillator and two Phase Comparators The VCO Produces an Output Signal Whose Frequency is Determined by the Input Voltage Inhibit Control Pin Operating Temperature to 85oC Low Power TTL