Dobsonian mounting plate for fan and control board
thingiverse
This is a mounting bracket for a fan kit I purchased from Astro Systems for my home made 17.5" dobsonian telescope. It was designed custom for my telescope but could easily be adapted to any classic dobsonian telescope mirror cell. It is designed to slide over the bars on the back of mirror cell. Your mirror cell dimensions will typically be different than mine (which was built for a 17.5" mirror cell) so I've attached the OpenSCAD source so that you can adjust the parameters. Do not expect to just print the STL and it to work. STL is provided in case you want to start with a generated model in your modeling software of choice, instead of using OpenSCAD. When mounting the bracket, I placed 4 small dabs of silicon to hold the bracket to the mirror cell cross members and to also help absorb any vibration.
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