【Renesas】Drink water reminder

The main control adopts the Renesas R7FA2E1 main control chip, which is powered by 5V. The type-c port is used for power supply and downloading programs (don’t ask why not make a battery to put it in. I have drawn an 18650 power supply circuit before, and the chip exploded to create a shadow. I want to improve it. You can add it yourself), the usb to serial port chip uses CH340C (cheap big bowl, who doesn’t love it?), to judge whether the water cup is put down is to press the tact switch below through a column on the top of the shell (note: must not It is cheaper to choose a thin shell with a thickness of at least 1.5 or more (blood and tears experience). The screen uses a 0.96-inch OLED to display the last time you drank water. The potentiometer next to it is used to adjust the reminder duration through ADC sampling.

Lead out the remaining pins. Since the main control has a unique touch function, the touch buttons are also added and can be used (probably).

Since the components are not available, there is no verification, and there is no program. In the future, hardware verification and program writing will be completed as soon as possible.

Here are some pictures:

The shell is too thin and has bulged.

Jialichuang provided 6 boards for proofing (components were soldered on the other one)

Overall appearance (you can imagine that there is a screen in the middle and a knob on the right)