19 thoughts on building a barn door mount part 1.
Arduino barn door tracker code.
Arduino forum using arduino project guidance arduino controlled barn door star tracker.
They consist of two support pieces joined by a hinge like a book.
Calibrating the barn door tracker with a digital level.
4 minutes and moon approx.
Arduino stepper motor control john barton wood april 4 2014 at 8 10 pm.
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.
These are the so called scotch barn door or hinge mount since they use a hinge as the main element of rotation.
Star tracker using 28byj 48 stepper motor arduino and lcd display to vary speed.
100 usecs is 1600 cycles most tasks shouldn t take that but analog read takes a bit.
The arduino would allow changing the stepper rate to compensate making it accurate for longer periods of time.
That s a great build.
The tracker is moved by a small 5v stepper motor.
When nothing takes longer than 100 200 usecs you get code that runs smooth and responsive to real time events.
One of them is attached to the photographic tripod and the camera is mounted on the other one.
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.
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.
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.
What is the longest exposure time your tried with good star shapes using your barn door.
Then i let it run with my tracker for a while and did some least squares fitting to see how it was working.
A short video of saturn approx.
So i measured a nice and constant 7 255e 5 radians second over 10 minutes.
Acquired data with least squares linear fit.
2 minutes being tracked using a simple barn door tracker aka scotch or haig mount.
The tracking of a barn door drive is accurate only for small angles of the hinge.
