I designed a PCB that controls 2 actuators. PCB limits actuator duty cycle. When duty cycle maxed out, flags are set in firmware to prevent actuator movement. If the user shuts the system off, these flags reset. Flash is only good for 10K writes, so flash does not help - plus I will not know if the customer shut the system off for 2 hours or 1 second.
I would prefer to have some sort of timer to notify the MCU that duty cycle time is up. This could be used during operation or when the system is shut off.
My first thought - RC circuit + ADC. Seems simple and cheap. Managers don't like it. Not sure why, but they want something "simpler".
Thoughts/Ideas?
I would prefer to have some sort of timer to notify the MCU that duty cycle time is up. This could be used during operation or when the system is shut off.
My first thought - RC circuit + ADC. Seems simple and cheap. Managers don't like it. Not sure why, but they want something "simpler".
Thoughts/Ideas?