We found this mixer in an American documentation. Operational amplifier supports equivalent and changed number of inputs. Power can be between 6 and 12 V.
Found in a 1990s Motorola documentation, this high voltage circuit uses a PUT that is not a common...
This tunnel diode circuit was found in American documentation from 1966. The tunnel diode is the...
This circuit is from a 1998 Poptronics. The circuit triggers a buzzer after a certain time, waking...