here is a circuit.
Can I break into this circuit around where resistors R1, R2 are connected to 15 volts power supply and add a component that would turn enable or disable the circuit?
I would like to control this circuit with an Arduino, switch it on when temperature goes down, switch it off when temperature is above a specific sensor input value. (Like a thermostat)
Something tells me that there is a smarter way to control this circuit that by cutting power to it.
What would be the current that is going through R1+R2? Is it a good place to install a transistor?
How would the new circuit look like?