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Forum Index : Microcontroller and PC projects : Enclosure with charging contacts...
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Grogster Admin Group  Joined: 31/12/2012 Location: New ZealandPosts: 9610 |
Hi all.  I am looking for a plastic case with charging contacts on it and a matching cradle so that charging the unit is as simple as putting your average cordless phone back on it's cradle. I have been looking around the usual sites on the web, but cannot find anything at all like that. Does anyone have any links? Will consider anything. Failing that, I will also consider WATERPROOF charging sockets of any description, so long as they are small. I see you can get DC sockets with dust-caps, but they are not really waterproof, and I need this thing to survive outside in the rain. Smoke makes things work. When the smoke gets out, it stops! |
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bigmik Guru  Joined: 20/06/2011 Location: AustraliaPosts: 2950 |
Hi Grogs, An idea, NOT TESTED, but have you considered a coil charging method like the modern phones do? If you can't use the standard phone wireless charging pads (due to some protocol that may or may not exist) you can prob make your own with a large coil of wire as a primary and a small coil in your device to act like a transformer.. just rectify and filter in your device.. Anyway it is an idea I have had in my head for a while.. Kind Regards, Mick Mick's uMite Stuff can be found >>> HERE (Kindly hosted by Dontronics) <<< |
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| Grogster Admin Group Joined: 31/12/2012 Location: New ZealandPosts: 9610 |
Interesting idea. No, I had not considered it. I wonder if there is much involved? EDIT: There does not appear to be much in it. You can get charging receivers for about three bucks like this one here. And you can get charging pads for a few bucks more here. I am now seriously looking at this idea over contacts and cradles. Thanks for the heads up Mick!  Smoke makes things work. When the smoke gets out, it stops! |
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| PeterB Guru Joined: 05/02/2015 Location: AustraliaPosts: 655 |
Good morning both of you. So there I am, hanging out the washing and thinking "what about inductive charging like Nancye's tooth brush?" I had no idea it was so available and so efficient. Way to go! Peter |
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| Grogster Admin Group Joined: 31/12/2012 Location: New ZealandPosts: 9610 |
Yes, I never thought of it before Mick mentioned it. I have ordered a couple of different receivers and charging pads to play with. Smoke makes things work. When the smoke gets out, it stops! |
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| bigmik Guru Joined: 20/06/2011 Location: AustraliaPosts: 2950 |
Lads, Hey I didn't know you could buy the receivers with regulated power supply attached. We all learn something.. I have a couple of the pads I will now buy some receivers to play with. Hmm a few `potted' projects might be coming soon. Kind Regards, Mick Mick's uMite Stuff can be found >>> HERE (Kindly hosted by Dontronics) <<< |
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Quazee137 Guru Joined: 07/08/2016 Location: United StatesPosts: 593 |
Here's a few DIY projects Saw this years back and a few newer ones a hackster and from instructables and this from DFROBOT the PDF and as simple as it gets  having fun or try these you might get samples spring loaded connector yes two of theses are from my 2013 folders  |
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CaptainBoing Guru Joined: 07/09/2016 Location: United KingdomPosts: 2170 |
Grogs, you gotta get a 3D printer. You could then easily design a cradle with the inductive "transmitter" inside the rest on the back and put the "receiver" in the back of the mobile unit. I am revisiting and old project and the timing of this is very fortuitous. |
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| Phil23 Guru Joined: 27/03/2016 Location: AustraliaPosts: 1667 |
Hey All, Started playing with this idea about 12 months back. Got a charging pad & the coil thing for about $10.00 at the reject shop. Coil was intended to fit some obsolete iPhone. From memory I think I proved I could get over 700mA out of the coil. I did buy a few different coil/adaptors on Ali, but it's all in the ToDoIt box. Think the others with higher currents may have been suited to a Galaxy S3. Don't think I ever got a current out of them as there was a 3rd pin that needed to be brought into play before the coil enabled it's output. |
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| Grogster Admin Group Joined: 31/12/2012 Location: New ZealandPosts: 9610 |
@ Quazee137 - Thanks for the links. Some are quite interesting! @ CaptainBoing - One of these days, I will add one to my equipment. The only thing I don't really like about 3D printing, is that the final result looks rough. It is not really something you can use in a commercial product, as it looks kinda ugly. I expect they will get better and better and cheaper and cheaper though! @ Phil23 - You might have to dig out your ToDoIt box so we can compare notes!  Smoke makes things work. When the smoke gets out, it stops! |
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| Boppa Guru Joined: 08/11/2016 Location: AustraliaPosts: 814 |
I've seen some pretty impressive results from 3d printing, but to get the 'smooth' finish requires a fine filament and mega slow speeds... I had a mate with a tri filament machine, and he was getting pretty good results by using the thicker faster 'steps' to rough out the form, with one of the other hotpoints doing the fine filament and slow stepping the exterior visible panels (I was actually really impressed with some of his work, he was using the metallic looking filaments for some surfaces and they almost mirrorlike) |
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palcal Guru Joined: 12/10/2011 Location: AustraliaPosts: 1993 |
I ordered a wireless charging pad and receiver and they came today, I am eager to fit it to a project but the receiving coil came with a small adhesive metal plate and I don't know what to do with it. I searched the net, couldn't find anything. "It is better to be ignorant and ask a stupid question than to be plain Stupid and not ask at all" |
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| Grogster Admin Group Joined: 31/12/2012 Location: New ZealandPosts: 9610 |
You and me both! I was going to ask here, but never got around to it. I think it is supposed to be some kind of shield, but how exactly you are supposed to use it.... If I had to make a guess, I would say perhaps it goes on the phone-side of the coil, to possibly shield the electronics from the inductive coupling or something. Smoke makes things work. When the smoke gets out, it stops! |
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| palcal Guru Joined: 12/10/2011 Location: AustraliaPosts: 1993 |
I was thinking that maybe it goes between the receive coil and charger to form some sort of iron core transformer? "It is better to be ignorant and ask a stupid question than to be plain Stupid and not ask at all" |
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| PeterB Guru Joined: 05/02/2015 Location: AustraliaPosts: 655 |
G'Day All I had a look at inductive charging and that led to inductive resonant charging and now I wish I had stayed in bed. Is it possible? Peter |
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| palcal Guru Joined: 12/10/2011 Location: AustraliaPosts: 1993 |
Thought a bit more and scrapped the iron core idea, it would be in the wrong place. Maybe it is to put in the back cover of the phone so it sticks to a magnetic mount but then as I read on line it will interfere with the charging so why include it with the receiver. I will wait for some learned person to tell me or I will contact the people I bought it from. "It is better to be ignorant and ask a stupid question than to be plain Stupid and not ask at all" |
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| Volhout Guru Joined: 05/03/2018 Location: NetherlandsPosts: 5089 |
For waterproof charging contacts: Look at the military stuff. That is waterproof. Bit bulky maybe... As long as the gaskets are okay you can try to get some 50+ years old stuff out of a dump store that is still working and in good condition. Take one of these connectors out for your application. Wireless is a hype, most of this stuff is designed for a lifetime of 2 years, it get's replaced when you get your new phone. And in essence this stuff is not waterproof. You need to make your own water protection around it (a simple plastic bag may be sufficient though). Volhout. PicomiteVGA PETSCII ROBOTS |
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| PeterB Guru Joined: 05/02/2015 Location: AustraliaPosts: 655 |
O.K. if you don't like resonant charging try this. VISHAY IWAS-4832FF-50 Peter |
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| CaptainBoing Guru Joined: 07/09/2016 Location: United KingdomPosts: 2170 |
Hey PalCal - you OK? I played around with mine... it has the primary with a disc ferrite pad on the back and a self_adhesive ferrite pad that goes behind the secondary - I think it is for screening (or maybe to concentrate the field but I am no expert in magnetics) what I did find is that if you put the ferrite pad between the coils, the charge indicator goes out, hence me thinking it is some sort of screen. I have gone over both coils while active and not with my gauss meter but detected nothing These charger modules seem quite promising... not tremendous current capability, somewhere just over 200mA at 5.16V (my load doesn't go lower than 200mA and my ammeter jumps to 20A above, so I am in a dead zone) enough to trickle a NiMh cell... should do for what I have in mind. hth |
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| palcal Guru Joined: 12/10/2011 Location: AustraliaPosts: 1993 |
@ CaptainBoing Do you mean do I still have my marbles after suggesting something so silly or am I OK. If the latter, sure never been better. I will be even better still when I find out what this adhesive pad is for. "It is better to be ignorant and ask a stupid question than to be plain Stupid and not ask at all" |
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