Our device has:
- 3.5 x 3.5 mm RGB LEDs with controller (SK6812 mini) with extension pads (you can add more LEDs or LED stripe)
- MCU Atmel Attiny 85 with programming interface pinout
- analog sensor (photoresistor, thermoresistor)
- 3V battery connector (CR2032 or CR2016)
- power switch
Size - 30 x 30 mm.
We can use photoresistor or thermoresistor as analog sensor. Device can be programmed it with Arduino IDE, using Arduino Nano for uploading (Arduino ISP).