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TP4056 18650 5V 1A Mini USB Lithium Battery Charging Protection Board$0.17 -
WROOM-32D/U ESP32-DevKitC Development Board$3.75 -
ZK-PP1 Pulse Frequency Duty Cycle Adjustable Module$3.27 -
250V/450V 4.7UF/10UF/22UF/33/47/68/100/220UF DIP Aluminum Electrolytic Capacitor$0.19 -
5A MPPT DC-DC Step Down Module$4.87
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.16修改(3).png)
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