Voltage controlled toggle switch 1 in 2 buffered. www.haraldswerk.de

Motivation

Not much to say. Just a unidirectional toggle switch. The input is switched between two buffered outputs. Voltage and manually controlled. Status signaled with LED.

Specs and features

Voltage and manually controlled
Buffered in and output
Unidirectional
Status signaled by LED
Runs on +/-15V and +/-12V
Power consumption below 15mA each rail

Implementation

Schematic

Description:

The interesting point here is the overvoltage protection for the control voltage input. This is done with the MCP6002 rail to rail operational amplifier. He is powered between GND and +5V. So, no negative or positve voltage above +5V will go through it. The diode in the input is not needed for voltage protection. The diode protects the voltage source when it supplies a negative voltage. Without the diode the negative signal is loaded by the input of the MCP600x. The 1M resistors are there to provide a defined potential.

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