These are the so called scotch barn door or hinge mount since they use a hinge as the main element of rotation.
Arduino barn door tracker code.
When nothing takes longer than 100 200 usecs you get code that runs smooth and responsive to real time events.
Arduino forum using arduino project guidance arduino controlled barn door star tracker.
Note also the red dot sight for alignment.
What is the longest exposure time your tried with good star shapes using your barn door.
The arduino would allow changing the stepper rate to compensate making it accurate for longer periods of time.
One of them is attached to the photographic tripod and the camera is mounted on the other one.
They consist of two support pieces joined by a hinge like a book.
Hi i am a retired electro optical and controls systems design engineer having also served an apprenticeship as an optical instrument maker in the early 60 s.
100 usecs is 1600 cycles most tasks shouldn t take that but analog read takes a bit.
Acquired data with least squares linear fit.
Star tracker using 28byj 48 stepper motor arduino and lcd display to vary speed.
4 minutes and moon approx.
Mine is still manual have an arduino board and already located some source code just not got round to it yet and have good success with a 40mm lens with good 3 minute exposures just it isn t any good with a longer lens as i need that 10 second buffer.
Then i let it run with my tracker for a while and did some least squares fitting to see how it was working.
David hash s arduino barn door tracker university student david hash now an aerospace engineer updated peterson s build with an arduino pro microcontroller 1 8 stepper and pololu microstepping driver board to give 3 200 microsteps per rotation figure b.
Arduino stepper motor control john barton wood april 4 2014 at 8 10 pm.
The tracker is moved by a small 5v stepper motor.
19 thoughts on building a barn door mount part 1.
To do that better results are obtained when you track the rotation of the earth and the simplest of these methods is by using a.
The tracking of a barn door drive is accurate only for small angles of the hinge.
Arduino controlled barn door star tracker page 3.
Calibrating the barn door tracker with a digital level.
2 minutes being tracked using a simple barn door tracker aka scotch or haig mount.
That s a great build.
