Found in an EDN from the 90s, this circuit makes use of integrated circuits of the time, some of which are uncommon today. The output is given by:
Where:
January 2017 - The new Honeywell RSC TruStability ™ pressure sensor mounting board is available from...
With the appropriate choice of C1 and C2 it is possible to divide the frequency of a rectangular 3 V...
This circuit was obtained from an American publication from the 80's. We can use a BD136 instead...