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Old November 12th, 2017, 11:05 PM #41
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Yea, I was going to say I would have to stretch the image vertically to compensate for the low angle. Octave Image tools should have a function for that.
Maybe a + and - button on the GUI to adjust it.
The longer the lens focal lengths, the less that would be needed too.
Iíll work on that another time.

I just connected a touchscreen to the Pi so Iím not tied to the computer to program the Pi code.


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Iíll keep you in mind when itís time to fab parts.
I did find that the RPi will need some airflow. I ordered a pair of 5v micro fans.
If this works well, it should be able to calculate the group spreads too. That would be the ultimate test if it can differentiate small groups of shots.


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Old November 14th, 2017, 05:17 PM #42
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I did find that the RPi will need some airflow. I ordered a pair of 5v micro fans.
You might be able to get away with a couple of quality heat sinks.

My plan for mine is to cut a hole in the top of the plastic box to let the tall heat sink sit partially exposed.

If you do go with a heat sink, remember the most important part is getting a solid connection between the sink and what you are trying to cool. I've found the thermal pads to be trash on my PC application and bought the expensive compound (silver-something?) with good results.
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Old November 14th, 2017, 08:09 PM #43
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You might be able to get away with a couple of quality heat sinks.



My plan for mine is to cut a hole in the top of the plastic box to let the tall heat sink sit partially exposed.



If you do go with a heat sink, remember the most important part is getting a solid connection between the sink and what you are trying to cool. I've found the thermal pads to be trash on my PC application and bought the expensive compound (silver-something?) with good results.


Good idea. How do you hold the heat sink on, zip ties?
Right now I have the touch screen, and case/stand, and just today received the back cover. I was going to mount the fans on the cover. (I donít like having to drill all the air holes. It always looks hacked )


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Old February 13th, 2018, 09:35 PM #44
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Have your tried with and inferred camera? I would be interested in this for sighting in thermal scopes.
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Old February 14th, 2018, 08:01 AM #45
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Originally Posted by gamer_jim View Post
You might be able to get away with a couple of quality heat sinks.

My plan for mine is to cut a hole in the top of the plastic box to let the tall heat sink sit partially exposed.

If you do go with a heat sink, remember the most important part is getting a solid connection between the sink and what you are trying to cool. I've found the thermal pads to be trash on my PC application and bought the expensive compound (silver-something?) with good results.
There's a couple of fairly inexpensive Pi cases out there with built in cooling. I just ordered this one (arrived yesterday). For $9. I'm using it to stream video of 3D prints so I can monitor remote (using Octoprint).
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