Waveshare robot arm for microbit

Here I explore the Waveshare Robot Arm for microbit. It uses a robot arm working in 4 degrees of freedom controlled by the computer microbit.
The construction is identical to the Waveshare Robot Arm for Raspberry Pi version except they use different HATs or shields. The servo driver electronics uses the same servo driver based on the PCA9685.
While I started mechanical construction with the Raspberry Pi version it was much harder to control compared to the microbit version. This was because I did not zero the servos correctly. So my first video on the Waveshare series is on the microbit version where I pay more attention to the correct zero position and range of each servo.
There are four servos in the kit with the biggest servo moving the base. Four servos provide 4 degrees of freedom.
In this video my software, modified from a demo from Waveshare so I can select each servo and explore what angles can be targeted. The software sends data on the servo number and angle to the serial port where it can be captured by a serial terminal program on my Windows PC.
Microsoft Makecode is used for the software development.
The software (SERVO_KEY4) was very useful to help align and zero each servo. I can now transfer the mechanical configuration to the Raspberry Pi computer and my next video will demo how I control it with node-red software on the Raspberry Pi.
So what can I do with these robot arms. Potential projects include:
* using two arms to play the drums
* playing a xylophone - I might need two arms depending on reach
* hand and eye co-ordination: use the robot arm with a AI camera to pick an object and
deliver it to a target location.
* Drawing a picture with a pencil
* locate and point to stars with a LASER pointer - inside
* perform robot surgency on my prostrate!
Stay tuned for future videos on these projects.