Project:
Nikon D800 for astrophotography ?

Contents:

1. Nikon D800 overview
2. Adapter Nikon to Pentax 645
3. Lid, Dove tail, Tube ring
4. Focuser mechanism, driver
5. Off-axis guide camera
6. Main bracket
7. Wiring & USB-HUB
8. Test with Windows and APT
9. First Light
10. Balance system
11. Nikon vs Canon, Pentax FA vs Pentax
12. Tilt adjuster
13. KStars/INDI setup for Nikon
14. Correction of tilt
15. To be continued

Note:
I take no responsibility or liability for what are written here, you use the information on your own risk!

Related projects:

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• KStars / Linux commands and udev rules
• KStars / Raspberry Power
• Setup astroserver with Raspberry Pi3
• Setup astroserver with Raspberry Pi4
• Setup astroserver with Raspberry Pi5

2: General triple DC/DC converter

I already before built a triple DC/DC converter to power different devices. There is always a need for some odd voltage. My earlier design was very closed. This one will have the screw terminals on the outside of the enclosure and holes to adjust the output voltage from. Not necessary to open the lid every time there is some adjustment to do.

Enclosure:

A well ventilated enclosure with openings around the screw terminals. Before the 3D-printer era all kind of special design like this was almost impossible, now just some hours at the 3D-CAD design tool.

Circuit board:

The three DC/DC converters installed, output adjustable from 3 to 12 volt with 13 volt input. 2 Ampere maximum current on each with an attached cooler. The yellow device is a PTC-fuse, an automatic fuse, this one 2.5 Ampere at 12 volt. I normally have 8 Volt for the Canon / Nikon camera and focus driver, 5 to 6 Volt to the powered USB HUB. The last one I can use to feed the dew heater with a low voltage to reduce the power.

With these few components it's easy to use a general circuit board. I prefer to have the negative (black) on the left terminal so I have to cross wire it.

3D-printed and assembled together, the left terminal is the input.