This circuit was found in an American magazine 73 for radio amateurs of the 80s. It is an automatic transmission circuit for telegraphy. The circuit is TTL.
Placed inside the refrigerator, this circuit triggers an oscillator when the part is opened...
This circuit was found in the Linear Applications Handbook of the National Semiconductor of 1994....
This circuit was taken from the 1976 Siemens Integrated Circuits Manual. The TCA106 is an...