I have an old CD-burner (HP 9100 plus) where I would like to control the BLDC motor from.
My idea is to use the original IC of the burner as the driver and use an ATtiny13 for controlling it. There are however some problems.
I found out that the IC is similar to the LB11699H datasheet, only lower model.
When I hook the CD-burner up to the power the motor spins up and down by itself a couple of times and then stops. I disconnected the cable to the laser head for safety. During the time the motor spins I can make it stop and spin a bit faster by changing pins 1 and 2, but when the motor is stopped by the on-board circuit, I can do nothing... I don't get the motor spinning. What is going wrong?
Also I need to have an analog signal between 0 and 2 volt to control the IC. Can this signal be generated with a smoothed PWM from ATtiny13 or do I need to use something else? Perhaps two batteries with voltage dividers and transistor connect to ATtiny13 pins? How do I do this?
Could someone help me out here? :D