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If you're comparing the 1
They are red
high-power DC motors
The packed heatsink and fan combo keep your Pi4 cool even during intense workloads
Arduino Uno R3 Compatible Board
220V 4000W SCR Voltage Regulator pico If you're comparing the 1220V 4000W SCR Voltage Regulator This voltage regulator is connected to AC 220V, the output is connected to the electric stove wire or motor appliances, then rotate the knob for speed, voltage, and temperature control. The 220V voltage regulator is needed to keep voltages within the prescribed range that can be tolerated by the electrical equipment using that voltage. . It can be used as a light dimmer, fan speed controller, and stove temperature