All-
I am working on designing a 24 hour countdown timer and have decided to use a microcontroller to execute. I will likely be using a MEMS-based IC oscillator to replace a traditional crystal oscillator that will feed the microcontroller a fixed frequency for period pulses. I plan to implement 4 push button switches to control the increment of time, decrement of time, a start function, and on/off switch. The output will likely just be an LED that will blink upon countdown completion with a second output for possibly triggering another device such as a FET.
Is there any microcontrollers that you may recommend for an application such as this? Likewise for power supply. I'm not sure what sort of approach Id like to take for selecting a proper and adequate power supply (the smaller the better).
Any input would be great! Thanks!
I am working on designing a 24 hour countdown timer and have decided to use a microcontroller to execute. I will likely be using a MEMS-based IC oscillator to replace a traditional crystal oscillator that will feed the microcontroller a fixed frequency for period pulses. I plan to implement 4 push button switches to control the increment of time, decrement of time, a start function, and on/off switch. The output will likely just be an LED that will blink upon countdown completion with a second output for possibly triggering another device such as a FET.
Is there any microcontrollers that you may recommend for an application such as this? Likewise for power supply. I'm not sure what sort of approach Id like to take for selecting a proper and adequate power supply (the smaller the better).
Any input would be great! Thanks!