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Category: Other Circuits / Switching Circuits Views: 890 Rank: 0 Heres a simple circuit for controlling four switches from a distance through just a pair of wires.In the circuit, the inverting inputs (pin 2) of operational amplifiers IC1 through IC4 are set to refrence voltages of +12V, +9V, +6V, and +3V, respectively, through a chain of four 1k resistors (R1 through R4). visit page. In the circuit, the inverting inputs (pin 2) of operational amplifiers IC1 through IC4 are set to refrence voltages of +12V, +9V, +6V, and +3V, respectively, through a chain of four 1k resistors (R1 through R4). http://www.electronicsforu.com/EFYLinux/circuit/july2003/cir5-voltage.pdf
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741 voltage controlled switch with sharp acting relay at its output
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