ESP8266 for a simple, daily, long-duration silent alarm
Posted: Wed Mar 15, 2017 11:25 amI would like to make a silent alarm which flashes a bright (~100-500 mW) LED from 2100 hrs every evening until I press a button to reset the alarm (which could happen at any point from 2100 to 0100 so the flashing needs to remain active for as long as four hours).
This is the cheapest ESP8266 I could find at £1.38 and it has a couple of GPIO pins. I probably wouldn't want to use the Wi-Fi functionality because it would make it too complicated and don't think I'd need an RTC because I'm happy to just switch it on at 2100 hrs and then it can count the time from there. Thanks for input.
This is the cheapest ESP8266 I could find at £1.38 and it has a couple of GPIO pins. I probably wouldn't want to use the Wi-Fi functionality because it would make it too complicated and don't think I'd need an RTC because I'm happy to just switch it on at 2100 hrs and then it can count the time from there. Thanks for input.