2021-Current voltmeter-Hangshun chip

Current and voltmeter, powered by battery, can set protection voltage and current. Using HK32F030F4P6. Compatible with stm32f030f4p6.

Use INA226 to collect current and voltage. 0-36V, 0-5A. Use 1.4-inch 240*240 color screen ST7789V (Laowang screen ^V^). It is powered by lithium battery and USB type-c charging is convenient to use and avoid interference.

It is mainly used as an auxiliary device for old-fashioned experimental power supplies (the kind that adjusts voltage with a potentiometer) and is used in series with the output line of the experimental power supply.

The main function:

1. Display voltage, current, and curve.

2. The protection voltage and current can be set. When the protection range is exceeded, the output will be turned off to protect the back-end circuit.

3. It replaces the "OUTPUT" button of the experimental power supply. There is no output every time it is turned on. After confirming the voltage, press the button to turn on the output. Prevent the experimental power supply from being misadjusted or the potentiometer being damaged.

4. The PCB front and rear panels are designed and can be used directly.

Note: Do not re-copper the front panel, as it will cover the LED light hole. Pay attention to the capacitor voltage resistance.