We found this circuit in a publication from the 1980s. Transistors can be replaced by current equivalents. The circuit is for 6 V and the capacitors determine the frequency of the oscillations.
This is the receiver circuit for the previous transmitter. The range of the system can reach 100...
In this game, whoever tightens the sensors, which are metal bars or spent batteries, makes the...
This circuit is from an ancient American documentation. The T-Bridge circuit determines the...