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Hi, see if connections of DRV8825 is as this photo:https://a.pololu-files.com/picture/0J4124.600.pngbe careful of polarity of capacitorif it is ok try using this library for arduino and its sample codehttps://github.com/laurb9/StepperDriver
Showing Charts and Gauges o...View Instructable »
I used a Nema 17 stepper motor
Any bluetooth terminal emulator would work, you just should send the command by sending its ascii character
It works but you should adjust projector resolution inside python programs and change the binary images that will be shown on projector
Resolution of video projector is 1024X768, because it is hard to capture each pixel I used points of 2X2 pixels, projection area is 60X45 cm so it means that distance between points are around 2 mm. If you use a projector with min focus of 50 cm resolution will be 120 DPI, but you should install cameras in closer distance.
Lasercut interlock puzzleView Instructable »
Hi Paul, my projector can project more than 100000 different points, so if you catch them with both cameras you can have same number of points in your point cloud
For using Easydriver you dont need to change the Arduino code, but for using different Bluetooth you should follow the connection based on datasheet, bluetooth acts as a serial connection between mobile phone and arduino. In my code I used 10 and 11 pin for RX and TX, you should change the code if you want to use different pins
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