I have an external resistive device that will be powered within a circuit. I plan on using a D flip flop to drive a logic-level FET that will power the device.
The device has 3 pins: 1-3 has a 1 ohm resistor. When the resistor element heats up, it will physically touch pin 2, thus connecting all 3 pins together. Pin 2 is used as a cut-off switch, to which current should reroute from pin 1 through pin 2 (instead of pin 3).
I want to use this cut-off switch to somehow deactivate the flip-flop and turn off the FET. Once deactivated, the flip-flop should not turn back on until the user has power cycled the circuit.
Here's the flip-flop I was looking at: http://www.ti.com/lit/ds/symlink/sn74lvc1g175.pdf
What suggestions do you guys have for the topology?
The device has 3 pins: 1-3 has a 1 ohm resistor. When the resistor element heats up, it will physically touch pin 2, thus connecting all 3 pins together. Pin 2 is used as a cut-off switch, to which current should reroute from pin 1 through pin 2 (instead of pin 3).
I want to use this cut-off switch to somehow deactivate the flip-flop and turn off the FET. Once deactivated, the flip-flop should not turn back on until the user has power cycled the circuit.
Here's the flip-flop I was looking at: http://www.ti.com/lit/ds/symlink/sn74lvc1g175.pdf
What suggestions do you guys have for the topology?