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It's a DC 12V Single Channel Relay Module RF Wireless Switch Receiver + Remote Control Transmitter DIY Kit 433mhz
SPI Serial Interface(7
It has high efficiency and a high surge current capability of 500A
Simply connect your electronics (Arduino/Raspberry Pi and Motor Driver) and begin programming your robot
but smaller in size (of course a bit less powerful)
Set of Plastic Spur Gear & Worm Gear (Yellow) 005 2.1MM Back 3-Pins DC Jack/Socket It's a DC 12V SingleGears are incredibly useful you can use this to create custom gearboxes to transfer motion, change output shaft speed, increase torque, and any number of other gear like functions. Different types of gears have different Applications. Specification Material Plastic Number of Gears 4 Number of Spur Gear 3 Number of Worm Gear 1 6 Tooth Worm Gear Size 31. 4x18. 4mm 26 Tooth Spur Gear Size 39. 4x27. 8mm 38 Tooth Spur Gear Size 60x22. 2mm 56 Tooth Spur