We found this CMOS circuit for excitation of a relay in an old documentation. The transistor is a general-purpose high voltage as used in the power supply.
This circuit for light data transmission (visible or IR) has a maximum speed of 1 Mbps and can be...
This transmitter was found in an old publication on espionage. It applies a signal of a few...
The circuit presented emulates an OR gate with the LM3900, operational transconductance amplifier....