Found in an Electronic Design from the 90s, this circuit makes use of contemporary components, including the pressure sensor. Modern equivalent components can be used in a new project.
This circuit simulates a UJT, with two bipolar transistor. Frequency is given by C1 and P1...
Found in Maxim's documentation from the 90's, this circuit uses an integrated from the time...
This audio mixer was found in an old American documentation. The potentiometers are 1M and the...