This circuit amplifies signals from 0.5 Hz to 300 kHz. We found it in an old documentation. Equivalent transistors may be used. The gain is 20 dB.
In the figure we have the way to use a common LED as a light sensor. The operational power supply...
This TTL traffic light circuit was found in an English magazine from 1977. The magazine no longer...
With the circuit shown in the figure, we have a logic signal to activate a calling device when...