Hi
Does anyone know where I can find details of how to change the analogue spindle output, VSO, to pwm. I am sure I have read about it but alas cannot find it. If I remember correctly it involves removing a capacitor from the board, but I cannot find the details.
I am working on an interface between the DDCSV and a brushless motor controller but it needs to be pwm.
On my brushless controller the control pot sits at ~140V dc above gnd. The motor stops below 0.6V, max speed at 5V. The speed is controlled by a 5K pot which has its top end supplied with a 5V regulator (7805), which I shall use to power the circuit.
Initial schematic below.
Best Regards
picclock
Apparently I don't need the transistor pull down shown in the schematic as the controller board already has a 1k pulldown.