Hi, I'm starting to look for information to control a DC motor actuator Newport 850A, if possible from Arduino.I would like to know where can I find information about this and if someone on the forum could help me. (I'm no experience on electronics)The motors I want to control are laboratory instruments old (from 1990-1995).The information I have is the pinout of the actuators and technical documentation of the old driver, a PMC300 built on HCTL-1100. This type of equipment, is quite widespread in laboratories and handled by Arduino would be interesting.The actuator 850A is a DC motor in closed-loop with an optical encoder, and the pinout diagram is as follows:(DB-9 Connector)Pin 1: V + Positive supply. +15 VDC @ 175mAPin 2: V-Negative supply. -15VDC @ 175mAPin 3: PH1. Encoder Phase 1. High = positive supply. Low = GroundPin 4: AGND. Analog Ground. Control circuitryPin 5: NEARL. Reverse Limit. Open collector with a 4.7K pullup resistorPIN 6: AGND. Analog Ground. Motor Return.PIN 7: CMVEL. Velocity Command. Fordward +0.5 to +10 VDC. -0.5 to -10 VDC Reverse input current 20 microAPin 8: Encoder Phase 2. Same as PH1 with 90 degree phase differencePin 9: FLIMIT. Forward Limit. Same as NEARLI would be pleased if we can know where to start… I have read a few tutorials about controlling DC motors but I need a little help to start.