Found in an English publication in 1969, this circuit has a 600 kHz pass band. Ferranti's transistors support modern equivalents.
The transistors for this circuit from an 80's documentation can be the BC548 or 2B222 and the...
In the figure we show a timer, which is simpler because it uses only one of the four gates of the...
This circuit checks the infrared emission of a common remote control. We found it in the March 1993...