This 800 Hz sinusoidal oscillator was found in a 1970s American documentation. The transistor supports a modern general-purpose equivalent. The frequency is given by the RC network that can be changed.
This simple circuit for a high impedance magnetic phone (500 ohms or more) has been found in a...
This 3 V rail to rail buffer was found in a National Semiconductor documentation. The gain is unit....
We found this circuit in the September 1971 issue of Radio Electronics magazine. The sensor is an...