We found this circuit in a documentation from the 90's. The coil has its characteristics given next to the diagram. Power is provided by a 9 V battery and a range of a few tens of meters.
We found this circuit in an old documentation. It has a thermally compensated voltage reference. The...
Suggested by a Popular Electronics, this small amplifier that has a detector to follow RF...
The presented circuit generates a pulse whose delay in relation to the input depends on RC. These...