This is an experimental stepper motor driver for Celestron CG-4 German equatorial mounts . This unit is functionally equivalent to the Celestron dual-axis motor driver , and we developed it as a replacement unit for the original Celestron driver. The prototype circuit board of the motor controller unit. The core component of this motor driver is PIC16F88 8-bit MCU. This MCU is responsible for driving two motors and scanning the user inputs. As an original unit, this system also got a clock driver for the right ascension (RA) axis. This system uses two L293 motor drivers to drive the right ascension (RA) axis and declination (DEC) axis motors. This unit is designed to work with 6V bipolar stepper motors, which include in the telescope mount. The LM350 voltage regulator is used to maintain power to both stepper motors. Internal view of the prototype enclosure. This replacement motor drive provides all the functionalities of the original unit, which including manu...
This blog contains electronic, amateur radio, and embedded system projects, which I did during my free time. Unless otherwise noted, all the articles and projects described on this blog are based on my original designs.