Instead, we need a pin for controlling microstepping. You should add the four resistors between STEP- GND and DIR- GND pins to avoid a jitter of stepper motors at startup.Ī typical extender for A4988 has an ENABLE pin, however, we do not need it. Remote control, you can use your favourite one you use for TV or you can use any other for makers! This repo settings match with a remote control by Makeblock.Real Time Clock, note that DS3231 or more precise clocks are preffered over DS1307.2× flexible shaft couplers for joing the motors with mount.(optionally) Gearboxes for the motors (battery screwdriver is typically much cheaper than profi gearboxes and has some planetary gearboxes inside!).4× 4k7 or 10k resistor (or any other suitable resistor you hold in your hands).
2× stepper driver extender for A4988 (we will modify this part, so you should consider custom design with 100μF capacitor).2× NEMA 17 stepper motor (forget about 28BYJ!).12V and around 2.5A (depends on your stepper motors) Arduino MEGA2560, unfortunately Arduino Uno cannot be used due to the lack of memory.Real asynchronous control of stepper motors (any other code can be run in parallel).Wireless control via IR remote control.Camera control which alows you to take photos with predefined exposure time and with a predefined period.Calibration of mount pole which works similarly to All-Star polar alignement.Precise tracking (for any type of mount).Onboard catalogue of deep sky objects (the one which is present in Stellarium), so you can search thousands of Messier, Caldwell and NGC objects.Automatic pointing at predefined coordinates.Manual control with various precision (degrees, arc minutes and arc seconds).See future work for missing features (like communication via USB or Bluetooth). The total cost of upgrading your mount should be around 75 USD ( SkyWatcher SynScan GOTO Upgrade for EQ3-2 costs around 460 USD). The control utilizes a calibration method and various settings which enable you to control any type of mount (not just equatorial and altazimuthal) pointed at any direction. This project aims an automatic control for telescopes, is based on Arduino and is low-cost!
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