Convert the pins to 3PIN or multi-PIN sensor interface, using lithium battery and DC power supply. Lithium battery power supply requires a 18650 or other polymer lithium battery, and the power can reach 5V2A after boosting (implemented by MT3608). The DC power supply uses an LDO chip AMS1084 with a current of up to 5A as a step-down output. This expansion board also leads out several commonly used communication interfaces. The line sequence refers to the module line sequence of several major hardware manufacturers, but it will certainly not be compatible with all modules on the market. I hope someone can provide suggestions for improvement. If the technology can do it, we will make improvements when there is time. This design refers to 1. https://oshwhub.com/jixin/LDO\_5V\_3V3\_BL1084-73f656a5e7034bcfa6b90169cf687593 2. https://oshwhub.com/liyichuangeda/ji-yu-arduino-UNOde-kuo-zhan-ban 3. https://oshwhub.com/scarrr0725/ke-neng-shi-zui-xiao-de-5v-2ashe These three works, I would like to express my gratitude to the authors!
Introduction on CSDN: https://blog.csdn.net/qq_28547833/article/details/106269493
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