HomeBrew 3 Box

EDIT 5 - JUL 26th, 2024

To simplify builds I share the links to the components I used. You can easily find equivalent ones at your online store by comparing the images / sizes / model numbers.

OLED (for the original box, I don't have the model of the modified one)

RJ12 (the good one, fitting Mark's PCB)

RCA Socket (12VCC in and out)

RCA Male

3.5 mm Socket (TSH30 and thermistor)

3.5 mm male connector 2 poles (thermistor)

3.5 male connector 4 poles (TSH30)

pushbutton 3-6V self resetting momentary

3.5 female connector ( for the TSH30)

THST30 

EDIT 4 - Apr 2nd, 2024

• Modified the PCB holding posts to avoid break-ups
• Improved the switch position
• Added a second lid for a bigger OLED size
• Minor adjustments

NB: the OLED size varies from one manufacturer to the other. The OLED I used is 26x26mm, with the holes 22x22 mm center to center.

The second lid included in the files fits OLEDs with a 28 x 29 mm maximum screen size and holes 24 x 23.5 mm center to center.

If your OLED is different, I suggest using the .step or .3mf files to adapt the OLED slot.

Also, the embossed text should be filled with some white paint or Tippex.

EDIT 4 - Jan 21st, 2024

• Improved the snap-fit joints
• fixed the micro-USB access
• added “HBG3” text

The new .step file has today's date in the filename. I have left the old ones too.

EDIT 4 - Jan 7th, 2024

Added a holder to be clamped to the legs of the tripod, similar to Celestron's hand control holder. It comes in two sizes, 2" leg (most of the Celestron tripods) and 2.75" inch leg (CGEM-DX and few other mounts).

EDIT 3 - Nov 28th

Modified a couple of details on the bottom and top bodies to simplify the snap-fit of the halves: one of the PCB posts was clashing with the bulky RJ12 socket.

EDIT 2 - Nov 13th

1. Corrected a mistake in the Bottom part: the four posts inserting in the PCB holes where slightly too fat. They are now slimmer and fit better to the holes.
2. The text on the cover is now oriented correctly

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EDIT 1 - Nov 5th:

I have added a “recessed switches” version, as per the suggestion of dlwmacgregor. The two switches do not protrude anymore and require a small tool to toggle them. You will find both the .step and .stl files.

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A box for the HBG3 device by Mark Lord. See the relevant thread here:

 https://www.cloudynights.com/topic/854327-homebrew-gen3-pcb-wifibtgpsmusbrelay/

The box has slots and holes for:

• The PCB with Nunchack, micro USB and RJ12 ports
• #2 mini switches: AP/DA and on/off USB
• a 0,96"oled screen 128*64, secured by #4 M2 x 10 mm bolts
• #1 RCA jacks for the dew shield power IN/OUT
• #2 DIN jacks for the SHTxx probe and for the dew shield thermistor
• #1 momentary pushbutton to toggle the screens
• #1 GPC BCN-180 (glued on a side notch)

The box lid fits tight and has snap locks - no screws.

The box can be attached to the scope with a Vixen or Losmandy clamp, there is a slot for an M4 nut on one side. I enclose the 3D models for the Losmandy clamp and an M4 knob.

I printed it with Prusament PETG. No supports needed for the lid, organic supports recommended for the bottom box with all the slots and holes.

I have taken the knob (@george) and the clamp (@Gyoenastaader) here and slightly modified them, I hope that's OK for the “remix culture” license:

https://www.printables.com/model/228323-belt-tensioner-knob-m4-m5-nut

https://www.printables.com/model/365259-asiair-losmandy-mount/comments

I enclose the step files, to allow customizations to one's own configuration.

Enjoy!