This is the analog part of the previous circuit with the pressure sensor for the altimeter. The circuit is from a Radio Electronics from October 1990.
This circuit is better than the previous one in that the control is isolated by a transformer. The...
With this circuit it is possible to control an operational amplifier so that it switches an input...
This circuit is from a June 1968 Supertena Bulletin of Popular Electronics. The transistors can be...