Found in an ancient American documentation, this circuit can generate signals up to 40 MHz for a Z80, microcontroller widely used at the time. The circuit must be powered with 5 V and also serves as a shield.
This simple oscillator with two general-purpose transistors has its frequency given by capacitor...
We found this circuit in the Linear Applications Handbook by National Semiconductor. The base is...
This is a very simple configuration with a power transistor to control a DC motor from 3 to 12 V...