This small audio amplifier circuit in complementary symmetry was found in the 1974 Mullard Databook. The output pair can also be the BD135 and 136.
This keypad telephone encoder circuit was found in ancient American documentation. The components used...
At each switch position, a diode is connected in series with the motor, thus causing a small...
The passage of an object in front of the LDR, producing a shadow or even turning off the ambient...