Color circuit board

Based on the esp32C3 minimum system board, modules such as buttons, LEDs, OLEDs, photosensitive sensors, relays, temperature and humidity sensors, buzzers, and sliding rheostat are implemented.

LED module: LED in 0805 package, suitable for novice welding.

OLED module: uses 4-wire IIC communication OLED. Because the minimum system pins of Hezhou esp32C3 are tight, OLED with fewer pins is used.

Photosensitive sensor: Using photosensitive resistor, a 10K resistor is connected in series to read the voltage value.

Temperature and humidity sensor: Use the DHT11 temperature and humidity sensor with high cost performance, accurate accuracy and single bus communication.

Buzzer: Using active buzzer, the operation is simple and easy to use.

The last one uses colorsilk screen printing to make the whole look more beautiful.