I want to blink 3 different coloured LED's with different timing repetitions.
Red - every 2 minutes. Green - every 25 minutes. Blue - every 2 hours.
Components in the circuit:-
- 3 different coloured LED's
- Small vibration motor (heptic alert)
- Small battery 150-300 mAh.
- micro-usb to charge the battery
As I want to maximise the battery life I am confused which IC's or MCU's to use for this application. The vibration motor will function with all 3 LED's. To find a balance with cost and battery consumption is really difficult.
The timer IC I found with very low power consumption is TPL5010. But I will have to use 3 of these to control 3 LED's. If I use a cheap MCU like ATTINY9 it doesn't have a RTC for time keeping. To achieve lower power consumption the LED's can be turned on and off with quick intervals but is an MCU necessary for this?
What is the best way to achieve my application? Thank you!