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#1 | ||
DIY Tragic
Join Date: Apr 2018
Location: Sydney, more than not. I hate it.
Posts: 21,469
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I was unsure if this should go here or in the electrical sub-forum.
Want to put in a hardwired supply, single USB 2-3A off a new, separately fused aux circuit. It’s got to be reliable and durable; not IP68 or anything but doesn’t flake out when our summer temperatures are roasting in the cabin of a parked car. Everything is Chinese. But maybe something has given a dependable result - keen to hear. I’m looking at both closed modules, eg https://www.ebay.com.au/itm/264676886619 And open boards, eg https://www.ebay.com.au/itm/401368374755 (Both randomly selected from the thousand-plus on offer.) |
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#2 | |||
Experienced Member
Join Date: Sep 2006
Location: Australasia
Posts: 7,459
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Quote:
I ended up using a few of the under dash USB sockets from Jaycar with quality purchased USB leads with excellent performance. https://www.jaycar.com.au/under-dash...ocket/p/PS2016 Cheers |
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#3 | ||
FF.Com.Au Hardcore
Join Date: Mar 2012
Posts: 4,864
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Some of the closed module types you are looking at will be ruggedised with a goop (technykal term) poured over encapsulating the components which will be an advantage over the unprotected board in auto environment. The unprotected PCBs are cheap enough to buy a few replacements though....
We have noticed recently at work that even buying similar little boards (not quite what you are looking at) from same eBay seller, and within a close time frame, there were still differences with things like firmware that are not included in their descriptions, so we tend to buy a good handful. |
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#4 | ||
FF.Com.Au Hardcore
Join Date: Feb 2005
Posts: 2,882
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i have 4 of these installed in a vehicle https://www.ebay.com.au/itm/12V-Auto...oAAOSwKGRdd0~2
2 are powered 24/7 the other 2 are switched, 3 years running with no issues at all |
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#5 | |||
Thailand Specials
Join Date: Aug 2009
Location: Centrefold Lounge
Posts: 48,820
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Quote:
I've used this in the past - works well: https://www.ebay.com.au/itm/THUNDER-...sAAOSw63Re8ppw Suits those typical switch blanks you come across in Thailand Specials http://www.lvautomotive.com.au/p/893...b-socket-.html http://www.lvautomotive.com.au/p/893...b-socket-.html These work well too LV stuff is available through Burson or JAS Oceania. |
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#6 | ||
DIY Tragic
Join Date: Apr 2018
Location: Sydney, more than not. I hate it.
Posts: 21,469
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So, what introduces the noise? A particular component, or shabby build quality? What’s actually different inside the round units?
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#7 | |||
Thailand Specials
Join Date: Aug 2009
Location: Centrefold Lounge
Posts: 48,820
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Quote:
There might be a capacitor or some other filter inside the 12V aux plug on the dash cams for noise filtering - I've experienced it with dash cams being hardwired and USB accessory sockets. It was like on/off in a Hilux, the moment you took the dashcam out of the car the AM radio came back. The moment it went inside the door, no AM radio again. |
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#8 | ||
DIY Tragic
Join Date: Apr 2018
Location: Sydney, more than not. I hate it.
Posts: 21,469
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More curiosity - if you powered the USB converter supplying the noise-generating device off a separate battery not connected to the car, did it still introduce radio interference?
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#9 | |||
Experienced Member
Join Date: Sep 2006
Location: Australasia
Posts: 7,459
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Quote:
Both caused RF interference not power induced interference. |
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#10 | ||
DIY Tragic
Join Date: Apr 2018
Location: Sydney, more than not. I hate it.
Posts: 21,469
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So far the round ones seem to be doing what they say on the tin. Fitted three, have ordered up more. Bought them from “Frillneck Products Pty Ltd” on Fleabay.
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#11 | |||
FF.Com.Au Hardcore
Join Date: Nov 2009
Location: Perth
Posts: 1,657
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^ Good to know, easier than making my own.
Quote:
My dash cam is powered from the USB output of the cheap aux in radio cable I bought from ebay. I abandoned the aux in part, but kept the cable plugged in just for hard wiring the dash cam. Also have 2 USB ports on the aerpro fascia I installed to upgrade the head unit when I abandoned aux in. Lots of noise now. If I cared about radio I'd planned to either buy a name brand USB stepdown (like from rs components or something). Or make/modify my own. http://ka7oei.blogspot.com/2015/02/a...er-supply.html |
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