【RA】Desktop humidifier designed based on Renesas MCU +493425S

Desktop humidifier designed based on Renesas MCU

Front of the board

Back of the board

Implemented functions:

1. LED lighting and brightness adjustment
2. Humidifier works normally
3. ADC collects battery voltage, photoresistor voltage, and humidifier operating current
4. DHT11 temperature and humidity sensor collects temperature and humidity
5. OLED display, EC11 rotary encoder use, buzzer sound
6. Lithium battery charging
7. WS2812 controls brightness and color
8. Serial port and computer communication, PWM control, ADC sampling, external interrupts, etc.
9. OLED menu frame

Functions to be implemented:

1. Basic Boost circuit, drives the fan and adjusts the speed
2. Touch button function
3. OLED menu full functionality
4. Humidifier waterless working protection

currently existing problems:

1. Due to my lack of understanding of the chip and software, I didn't notice that the pin P200 of LED3 can only be used as an input pin. Then I used a jumper to fly to the P913 pin, and the light can be lit normally;
2. It was the first time to use discrete components for Boost. Since the parameters of the Boost circuit were not configured properly, the NMOS tube smoked when the PWM signal was supplied, so I removed it first and planned to wait for other functions to be realized before debugging;
3. The position of the encoder is too close to the OLED screen, and the knob cap will get stuck;
4. It was my first time to draw a 3D casing and I had little experience. The drawing was rather ugly and I couldn’t hide the lithium battery in the casing;
5. I'm still a novice at coding, so I write programs in a hurry and in a messy way, and there are still some problems that I haven't solved yet. .