This circuit indicates the logical level of a CMOS circuit, extracting the power from the circuit being analyzed. The circuit is from an American magazine from the 90s.
We found this circuit in a 1995 paper. The reed switches are surrounded by a few coils of coarse...
This circuit can supply voltages in the range of 8 to 20 V with a maximum current of 3 A. The...
If mounted with SMD components, this spy transmitter for the FM range can fit into a pen. The...