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Found 4 results

  1. Hi! I purchased a Raspberry pi 4 4gb not so long ago with the intention of running a NAS and some other stuff on it. I have since then considered the possibility of using it to control the alt/az position of a mount like the Skywatcher AZ GTi with a python script running on the raspberry pi. I haven't purchased the mount yet since I'd like to hear if it would be possible. A little more information on my main objective: Weather satellites and radio has recently caught my attention and I'm therefor considering to mount a directional antenna on the skywatcher AZ GTi mount which then tracks a chosen satellite across the sky. The raspberry pi would be running a program that would send the alt/az coordinates to the mount. I have thought about sending the alt/az coordinates through a TCP socket but I'm not sure how I would connect (and if it's possible) the mount to the raspberry pi or the opposite way. Here's a video of the current software I'm working on: I've seen people control mounts like the Celestron nexstar ones but it would be ideal to make the small and light weight AZ GTi perform the same job. If you have any experience with the AZ GTi mount and raspberry pi I would highly appreciate your advice:) Thank you in advance! Victor
  2. Hello Guys, I'm about to start work on upgrading my focuser. I did buy a SkyWatcher electric focuser, but because of the slop in it it never worked with a heavy DSLR on the tube, which is exactly when you want it. So I'm embarking on a project to: Do the PTFE thing on my focuser tube; Connect my Arduino (which already does GOTO and DSLR remote control timer) to the SkyWatcher focuser; Write a bit of python to do the autofocus search and this what I'm asking here: What focus algorithm have people played with? I'm thinking of starting with the scan of contrast along vertical lines, like this: img=imread(“test.jpg”); contrast=0; (x, y) = img.size() for j in range (0, x): contrast=contrast + img[j]-img[j+1] print contrast Sorry, about the syntax! So I'll create a v-diagram and move focus in and out until contrast is at a minimum. There are other algorithms out there, but this seems to be the simplest to implement. What do people think? Regards Steve.
  3. Hi Guys, I have an old C8-N with drives and a handset with an ST4 port. I'm using an Arduino to do small jobs around my setup like exposure control, electronic focusing, guiding and small GOTOs through the handset (large ones take too long). The first three work nicely, by my GOTO is all over the place and I've just realised that whether I'm looking toward the Eastern horizon or the Western one must mean that I need to invert my Dec movements. Is this the case? Is this the only effect of the meridian flip? The RA axis keeps on chugging (and I don't mean collecting for charity) in the same old direction, but Dec needs be inverted. Is there a proper name for these two modes, like "Western mode" and "Eastern mode", or before and after midnight? What else should I look out for? Thanks Steve.
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