This is the circuit of a robot published in the June 1992 issue of Radio Electronics magazine. The sensors are used to drive 2 motors with reduction gears. The power is provided by batteries.
This is one of many twin-T oscillator configurations that can be found in this section and on this...
We found this circuit in an English documentation from 1979. The circuit can be implemented with a...
This Wien bridge oscillator was found in a 90's EDN. The components are from that time and the...