High impedante circuit for sensor (CB20542E)

This circuit for PC and which can also be used with microcontrollers was found in an English documentation from 1992. A font must be symmetrical.

ECX 32 SMD Quartz Crystals
June 2017 - ECM032 series of SMD quartz from ECS crystals can now be obtained from Mouser...
Resistance to voltage converter (CB5092E)
We found this circuit in an American 80's documentation. The circuit can be adapted to function as a...
Signal Injector (CB1385E )
This traditional signal injector from a 1970s publication uses germanium transistors. We can mount it...