Quantity   Component name
1 × Arduino Pro Micro
1 × ESP8266 ESP-01
4 × IV-9 Numitron
1 × Rotary encoder Mode selector knob
1 × Tiny RTC I2C module
2 × TLC5940 led driver
2 × 1 kohm resistor IREF resistor for the TLC5940
3 × 10 kohm resistor 2 x BLANK resistor for the TLC5940, 1 x ESP's RX pin level shifter
2 × 0.1 uF capacitor Decoupling capacitor fot the TLC5940
1 × 3.3V zener diode ESP's RX pin level shifter
1 × 100 uF capacitor De-coupling for the power rail
1 × LM2596 DC-DC 3-35V adjustable step-down power supply module On-board power source