this is a 3d printer kit.
- uno r3 arduino compatible board:atmega328-au single-chip installed uno bootloader.usb programming is provided by ch340g.usb-b includes connectors and cables.including the title pin.input voltage:7-15v.0-5v output,3.3v compatible input.14 digital i/o pin (6 pwm outputs).6 analog input.
- isp title.32k flash memory 16mhz clock speed.all smd structure.r3 shield compatible.input voltage:no external power supply connected to the computer usb,external power supply 5v ~ 9v dc.
- output voltage:5v dc voltage output and 3.3v dc voltage output.use the atmel atmega328 microprocessor controller.
- cnc shield v3:this expansion board as a drive expansion board,can be used for engraving machine,3d printer.it has four slots,which can drive four a4988 stepper motors.
- each stepping motor requires only two io ports.in other words,six io ??ports can well manage three stepper motors.use very convenient.warranty:1 * cnc shield v3.4 * a4988 step drive with radiator.1 * uno r3 mega328p ch340g.
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