Tamiya 70093 3-Speed Crank-Axle Gearbox Kit SF_Motor Accessories and plugging in the USB-I2C

and plugging in the USB-I2C module to a spare USB port

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Tamiya 70093 3-Speed Crank-Axle Gearbox Kit SF_Motor Accessories and plugging in the USB-I2CTamiya's 3 speed crank axle gearbox looks very much like half of the twin motor gearbox (with an added gear ratio option). This compact gearbox can be built in one of three gear ratios (17: 1, 58: 1, and 204: 1), and is Tamiya's cheapest, general purpose gearbox. Overview The Tamiya 3 speed crank axle gearbox is essentially half of the twin motor gearbox . The kit comes with enough parts so you can build the gearbox in any of three gear ratios (17: 1,