Sbarra Posted April 21 Share Posted April 21 hello everyone, i am making an upgrade to an equatorial mount from my current star tracker.Im getting the skywatcher HEQ5 and it requires a power source. Im trying to keep costs down when looking at a power source for the mount. i have Milwaukee M18 batteries and can get this adapter. will this be good or do i need to look at something else? https://www.peaveymart.com/outdoor-equipment/generators/inverters/milwaukee-m18-top-off-175w-power-supply-tool-/3521961?gad_source=1&gclid=Cj0KCQjw8pKxBhD_ARIsAPrG45n-RaQe6-LjTvYg_VBvlVb0lvHzK5KlVI0i-7JGBB5uXJtH3z49qBQaAkt2EALw_wcB&gclsrc=aw.ds Link to comment Share on other sites More sharing options...
michael8554 Posted April 21 Share Posted April 21 (edited) That's a good idea, but it's not a complete solution. Your mount requires 12V to 15V DC. The USB-C provides 45W at presumably 5V, they don't specify. So you might need a 5V to 12V-15V DC Converter. The 120V AC out could power your laptop. Michael Edited April 21 by michael8554 Link to comment Share on other sites More sharing options...
Cornelius Varley Posted April 21 Share Posted April 21 7 minutes ago, michael8554 said: So you might need a 5V to 12V-15V DC Converter. Would this provide the minimum 2 amps required by the mount ? 8 minutes ago, michael8554 said: The 120V AC out could power your laptop. Or power a suitable 12v psu. Link to comment Share on other sites More sharing options...
Cosmic Geoff Posted April 21 Share Posted April 21 No need to invent unconventional solutions. Many people use mains power to +12v regulated power packs. Or car engine starters which deliver +12v. Or dedicated astro power tanks, the LiFePo rather than lead-acid varieties being increasingly favoured. Link to comment Share on other sites More sharing options...
wookie1965 Posted April 21 Share Posted April 21 https://www.picstop.co.uk/telescope-power-accessories/celestron-powertank-lithium-lt.html?gad_source=1&gclid=Cj0KCQjw8pKxBhD_ARIsAPrG45mfjPh1XClUFi17vl4_d5u9gLY14eizKCIEFWpjfdtmSJFfqecJBRsaAr47EALw_wcB I have one of these does the job on my EQ5 Pro. Link to comment Share on other sites More sharing options...
AstroKeith Posted April 21 Share Posted April 21 The USB C output is a PD type, so with the right cable it can be triggered to supply 12V. Link to comment Share on other sites More sharing options...
michael8554 Posted April 21 Share Posted April 21 "So you might need a 5V to 12V-15V DC Converter." "Would this provide the minimum 2 amps required by the mount ? 45W at "presumably 5V" = 9A. At 12V that converts to roughly 3.75A, not counting conversion losses. But a dedicated astro power tank at roughly the same price makes better sense. Michael Link to comment Share on other sites More sharing options...
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