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Robot Arm for micro:bit User Manual

Robot Arm for micro:bit

User Manual

CONTENT

Overview .............................................................................................................................................. 2

Hardware ...................................................................................................................................... 2

How to use ........................................................................................................................................... 3

Demo codes .................................................................................................................................. 5

microbit-Servo ...................................................................................................................... 5

Microbit-Servo ...................................................................................................................... 5

Microbit-Servo-Bluetooth ..................................................................................................... 6

microbit-Servo-Radio ............................................................................................................ 8

Summary of content (9 pages)

PAGE 1
Robot Arm for micro:bit User Manual Robot Arm for micro:bit User Manual CONTENT Overview .............................................................................................................................................. 2 Hardware ...................................................................................................................................... 2 How to use ........................................................................................................................
PAGE 2
Robot Arm for micro:bit User Manual OVERVIEW Equip your micro:bit with this 4-DOF metal robot arm, and get started to explore the world of artificial intelligent robotic. This starter robotic arm kit includes: servo driver board, metal mechanical arm structure, and 4x metal gear servos. When used with the micro:bit, it is easy to control the arm by smart phone through Bluetooth connection. HARDWARE Servo Driver for micro:bit and 5V 3A power adapter are included in this kit.
PAGE 3
Robot Arm for micro:bit User Manual HOW TO USE Visit micro:bit programming website in Browser: https://makecode.microbit.org/ Click Projects-> New Project to create a new project Click Advanced->Add Package and input the address: https://github.com/waveshare/pxt-Servo Add the package After adding, you can see that Servo block class appears to block area. In the class, two blocks are included.
PAGE 4
Robot Arm for micro:bit User Manual : This block is used to control the angle of servo in range 0°~180°. Channel can be change from 0 to 15. : Use this block, you can set the PWM pulse in range: 500~2500. The relationship between start pulse and degree is as below: 500 ------- 0° 1000 ------- 45° 1500 ------- 90° 2000 ------- 135° 2500 ------- 180° You can control servo just by setting channel, degree and pulse, it is simple.
PAGE 5
Robot Arm for micro:bit User Manual DEMO CODES We provide four demo codes (HEX file) for this module. You can copy them to micro:bit for testing. Drag HEX file to the web page directly could get details information of demo code: https://makecode.microbit.org/ MICROBIT-SERVO This demo code is used to rotate 16 servos in range 0~180 all the time. item: current angle Flag: step length for every change. Positive value stands for co-rotating, and negative for reverse, interval is 20s.
PAGE 6
Robot Arm for micro:bit User Manual pos: current angle step: step length for every change. Positive value stands for co-rotating, and negative for reverse, interval is 20s. You can change the pause time to change the rotate speed of servo. Download the demo code to micro:bit, connect servo to channel 0, then try to control it by buttons A and B. MICROBIT-SERVO-BLUETOOTH microbit-Servo-Bluetooth, the function of this code is to rotate four servos 0~4 via Bluetooth.
PAGE 7
Robot Arm for micro:bit User Manual This is the Bluetooth remote control code. pos0~pos3 are current degrees of channel 0~3. step0~step3 are step length. When command are received by micro:bit from app, micro:bit will change the step as received to control servo. If step is not equal to 0, change the pos and let servo move. (Note that the value of pos should in: 0~180) To use this demo code, you should first install APP for Bluetooth communication.
PAGE 8
Robot Arm for micro:bit User Manual MICROBIT-SERVO-RADIO This code we use 2.4Ghz RF function of micro:bit. To test this code, you need two micro:bit, one is connected to Joystick for micro:bit as sender, and another connected to Servo Driver for micro:bit as receiver which will control robot.
PAGE 9
Robot Arm for micro:bit User Manual Code of Receiver: Like Bluetooth code, pos0~pos3 are current degree of servos from channel 0 to channel 3, step0~step3 are step length. You should flash sender code to micro:bit which connect Joystick module and flash receiver one to servo module. Then you can control servo by module Joystick for micro:bit. For more details about Bluetooth and 2.4G, you can refer to the user guide of KitiBot for micro:bit: https://www.waveshare.