Quote:
Originally Posted by Robert9
Mike, do you think you really need a controller for the dew-heater. I have just a number of resistors in parallel wrapped in a bit of cloth and held in place by the omni-present velcro. This draws only a fraction of an amp from my 12V source and provides sufficient heat to avoid dew formation.
The design I used is from IIS Projects.
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I daresay you're right, Robert. I do have a tendency to want to over-engineer things!
I might just read up on the project and incorporate the resistors in next week's pimp of the dewshield. Since I will then have 12V up to the scope OTA, I might as well then install the little red LED I have been threatening to put in the plastic eyepiece of my SW 9x50 finderscope, so I can see the x-hairs more easily. Bling is good!
I'm also busy today making a small 12V motor-drive focuser, using Jaycar parts, for my GSO 2:1 Crayford on the back of the C8, using the rubber-band belt drive approach. I'll post a thread on that if it's successful. Unfortunately it involves use of the complete array of my precision hand tool collection; battery hand drill, hacksaw and screwdrivers
Plenty of uses for the 12V supply once it's at the OTA
