I have been requested to look at a project. The first half of the project is complete, but I am struggling with the second half of the requested specification.
For the second half of the project, I require a six month timer. Accuracy is not an issue as long as the output action is within 4-5 days of timer reset. At the six month point, an LED is illuminated and an internal sounder activates. The sounder can be muted, via a push button, but resound after a 24 hour period and repeats until the service counter is reset, which also extinguishes the LED and the timer process re-starts.
Looking into it, I believe I require a microprocessor to handle the timer event, but not to sure how to handle the buzzer/mute function. Could this be via a secondary processor (i.e. primary processor outputs to a secondary processor input and PIC is programmed to handle the LED and buzzer functions)? If so, is there anything I should be aware of under this set-up?
Appreciate any advice and help with this.