1. In 64 subdivision or 128 subdivision can have a good ultra-quiet effect;2 working voltage: 6V-36V, the recommended voltage is 12V;3. The maximum current of 1.5A, the default is 0.8A;4. Subdivision: 1, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64, 1/128;5. Must add heat sink, making the heat dissipation betterPlease be sure to match the use of large fan-assisted cooling).Maximum drive current: 1.8A (factory default 0.8A)Maximum voltage: 36V (usually 12V)Support subdivision: 1, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64, 1/128;Product Technology: Four-layer PCB boardProduct weight: 5gUse tips:8729 drive pin is blue on one side, black on the other side, corresponding to the color of the socket on the main board, to improve the user experience.Subdivision setting table:Motherboard subdivision jumper from left to right are M1, M2, M3. Jumper cap plugged in as High, jumper cap removed as Low, the specific settings below:After a long period of testing, using the 64 sub-best.Drive current algorithm and regulation1. Drive current algorithm: i = Vref / 0.5, the default Vref about 0.4v, so the default current of 0.8A, the maximum current of 1.5A 2. Vref measures the voltage at Gnd and the middle of the potentiometer as shown below;3. Be sure not to connect the motor voltage measurement, or easy to burn drive;4. Measuring voltage should be connected to the power, do not just connect the USB power supply.5. Adjust the drive potentiometer, be sure to slightly adjust the potentiometer, measured again after the transfer, to avoid the current caused by excessive drive burn;6. clockwise to increase, counterclockwise to reduce;Colour:black+blueMaterial:PCBSize:1.5mm x 2.0mmPackage Contents:1 x LV8729 driver moduleOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.