Processor: Node MCU (ESP-12)
Movement is done with cheap 28BYJ 5VDC step engine and ULN2003 stepper driver, it is accommodated with optical sensor for right position (Carrier wheel have printed special cylinder with spacing). 0.96" I2C 128X64 monochromatic OLED display is used to show immediate data.
Doses: Up to 20 doses.
Material: 3D printing material.