This timer, like the previous circuits, uses a currently uncommon integrated circuit. The time is given by capacitor C1 and R2 which has the range of values indicated in the diagram.
This modulated transmitter for a light beam communication system was found in the 1991 Electronics...
This amplifier step with a transistor has an input impedance of 100k to 10 M. The transistor can be any...
With this circuit, tests can be carried out on cables with great practicality. The circuit is...