I have 2 of these Stakka CD/DVD carousel storage units that stopped working:
I don't use CDs or DVDs much at all nowadays so opened it up to take a look how it works:
Turns out it's really simple inside:
Not the stepper motor I was expecting, the turntable is run by a standard motor and an LED/LDR tracks position
- the turntable has notches underneath every slot for tracking.
There's also another motor to lift and eject the chosen CD, again DC motor and pulley arrangemen.
- the turntablemotor is geared down to around 30 rpm.
Turned on its side and 30rpm is ideal for the "wheel" size, once the bottom has been cut off the case:
Here it is with both units & wheels and using an ATtiny85 and SN754410 motor controller chip
This is a companion discussion topic for the original entry at https://community.robotshop.com/robots/show/big-wheeled-stakka-rover