Touch switch (CB21299E)

Found in American documentation, this switch is based on the 4093. The load will determine the supply voltage. The transistor is general purpose.

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Optical Transmitter (CB4953E)
This circuit for light data transmission (visible or IR) has a maximum speed of 1 Mbps and can be...
Power Line Transmitter (CB19423E)
This transmitter was found in an old publication on espionage. It applies a signal of a few...
OR gate with the LM3900 (CB4032E)
The circuit presented emulates an OR gate with the LM3900, operational transconductance amplifier....