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gpio - 5v/12v power source/submersible water pump/RPI/relay. What kind of combination is suitable? - Raspberry Pi Stack Exchange
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Amazon.com: PlusRoc Waterproof 12V/24V to 5V Converter DC-DC Step Down Module Power Adapter Compatible with Raspberry Pi 4, Cellphone, Car (USB Type-C Connector) : Electronics
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12V DC 1000mA (1A) regulated switching power adapter - UL listed : ID 798 : $8.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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