Hello,
I'm working on a PWM circuit based off a 555 timer to run a 12v dimmer in a vehicle. I have limited electronics knowledge, as I'm just a maker working on personal projects.
My issue is I need a "failover" if the PWM circuit fails. Failure point is the potentiometer, where one or both sides lose continuity due to wear and the lights turn off. My goal is to add a function where if continuity is lost on the PWM circuit, the lights default to "on", but otherwise are controlled by PWM.
I have attached my diagram, I apologize for any mistakes. My thought is, I could potentially put a NOR gate on both sides of the potentiometer which runs a second mosfet on the output. Since this is where I'm generating the frequency I don't know if the NOR gate would work there or if it would cause any other issues with the circuit.
Am I going in the right direction? Am I overthinking this? Is there a simpler answer? Thanks in advance.
I'm working on a PWM circuit based off a 555 timer to run a 12v dimmer in a vehicle. I have limited electronics knowledge, as I'm just a maker working on personal projects.
My issue is I need a "failover" if the PWM circuit fails. Failure point is the potentiometer, where one or both sides lose continuity due to wear and the lights turn off. My goal is to add a function where if continuity is lost on the PWM circuit, the lights default to "on", but otherwise are controlled by PWM.
I have attached my diagram, I apologize for any mistakes. My thought is, I could potentially put a NOR gate on both sides of the potentiometer which runs a second mosfet on the output. Since this is where I'm generating the frequency I don't know if the NOR gate would work there or if it would cause any other issues with the circuit.
Am I going in the right direction? Am I overthinking this? Is there a simpler answer? Thanks in advance.