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ft818:aio_box:v2 [2020/05/07 23:08] f4ija |
ft818:aio_box:v2 [2020/06/11 16:41] (current) f4ija |
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====== V2 AIO Box ====== | ====== V2 AIO Box ====== | ||
+ | {{ :ft818:aio_box:img_20200601_130552.jpg?600 |}} | ||
+ | |||
===== Changelog ===== | ===== Changelog ===== | ||
* Box has now some rear legs to permit to do not install it vertically on the fans. | * Box has now some rear legs to permit to do not install it vertically on the fans. | ||
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* Better hole for disconnecting the microphone plug, to be able to put the thumb to release. | * Better hole for disconnecting the microphone plug, to be able to put the thumb to release. | ||
+ | ===== Specifications ===== | ||
+ | * Overall dimensions : 272x156x74mm | ||
+ | * Weight : 2150g with everything (FT-818 + its battery pack, AIO battery pack, RPI4, wires, connectors, etc) | ||
+ | * Material for printed parts : PLA or PETG | ||
+ | * Battery pack capacity : Lithium ion 3S2P 6600maH + internal FT-818 battery pack | ||
+ | * Cooling : passive and active with thermal switch | ||
+ | * Plates material : 2017A aluminium (no paint or electrolitic treatment) | ||
===== Wiring diagram ===== | ===== Wiring diagram ===== | ||
{{ :ft818:aio_box:wiring_diagram_v2.png?600 |}} | {{ :ft818:aio_box:wiring_diagram_v2.png?600 |}} | ||
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| RJ45 socket | 1 | [[https://www.conrad.fr/p/prolongateur-rj45-femelle-8p8c-vers-rj45-femelle-8p8c-cliff-cp30220-1-pcs-1383229|link]] | To directly connect to the RPI through RJ45 | | | RJ45 socket | 1 | [[https://www.conrad.fr/p/prolongateur-rj45-femelle-8p8c-vers-rj45-femelle-8p8c-cliff-cp30220-1-pcs-1383229|link]] | To directly connect to the RPI through RJ45 | | ||
| 4mm banana socket | 1 | [[https://www.conrad.fr/p/borne-de-polarite-stylo-4-mm-tru-components-tc-r1-14m-b-1587894-noir-10-a-1-pcs-1587894|link]] | for counterpoise connection | | | 4mm banana socket | 1 | [[https://www.conrad.fr/p/borne-de-polarite-stylo-4-mm-tru-components-tc-r1-14m-b-1587894-noir-10-a-1-pcs-1587894|link]] | for counterpoise connection | | ||
+ | |||
+ | ===== Passive cooling system ===== | ||
+ | Regarding the V1, the V2 integrate a new passive cooling system to cool down the RPI4. | ||
+ | |||
+ | The RPI4, with its power, is also a small heater and for field op, I don't want to fry it with to high temperature on the main processor. | ||
+ | |||
+ | So on the V1, I've added some fans at the back of the box, with a 40°C thermal switch to trigger once the temperature was above that to cool it down. | ||
+ | |||
+ | But with that system, event it's working, was that the fans were trigerred almost all the time, 5 minutes after the RPI booted up. | ||
+ | |||
+ | The fans noise and the extra current consumption is not a really good idea. | ||
+ | |||
+ | On the V2, the whole bottom of the box has been replaced by an aluminium plate to create a heatsink with a small CNC milled aluminium block, in contact with thermal paste to the processor : | ||
+ | |||
+ | {{ :ft818:aio_box:coimg_20200525_214736.jpg?600 |}} | ||
+ | |||
+ | The thermal contact is now screwed on the aluminium block and it's now a 60°C version : | ||
+ | |||
+ | {{ :ft818:aio_box:coimg_20200525_214953.jpg?600 |}} | ||
+ | |||
+ | With that setup, the RPI4 is installed upside down but it's not a bad thing, because I've now a better access to the µSD card, to back it up. | ||
+ | |||
+ | Fans are still installed outside the box : | ||
+ | |||
+ | {{ :ft818:aio_box:coimg_20200526_001825.jpg?600 |}} | ||
+ | |||
+ | But with that passive cooling, I was not able to trigger them for now. I leave them in case of extreme situation, for example in field operation in a very hot area (desert for example). | ||
+ | |||
+ | The bottom plate is now a bit hot after an hour of continuous use of the RPI4, maybe 38°C (didn't measured accurately for now). But there is still a lot or margin before trigerring the fans. | ||
+ | |||
+ | The result is now a very well integrated RPI4, with an efficient cooling. | ||
+ | |||
+ | ===== Pictures ===== | ||
+ | {{ :ft818:aio_box:img_20200601_125840.jpg?600 |}} | ||
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+ | {{ :ft818:aio_box:img_20200601_125909.jpg?600 |}} | ||
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+ | {{ :ft818:aio_box:img_20200601_130150.jpg?600 |}} | ||
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+ | {{ :ft818:aio_box:img_20200601_130608.jpg?600 |}} | ||
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+ | {{ :ft818:aio_box:img_20200601_130621.jpg?600 |}} | ||
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+ | {{ :ft818:aio_box:img_20200601_130708.jpg?600 |}} | ||
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+ | {{ :ft818:aio_box:img_20200601_130738.jpg?600 |}} | ||