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Topic: LCD 3.5" DF8OE/SP9BSL (Read 16327 times)
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Paul C. H.
Neuling
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Posts: 23
Ich liebe dieses Forum!
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Re:LCD 3.5" DF8OE/SP9BSL
« Reply #61 on: 24. January 2018, 11:05:11 »
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Regarding headers:
For compatibility reasons I recommend to put the female header on UI PCB. There exist some with a height of 5mm - these are the best. At LCD you must fit the male header. You can shorten the pins to a length of 3...4mmm so that LCD PCB is directly laying on female header.
vy 73
Andreas
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found 5mm female header, minimal order quantity is 1000, but I am lucky enough as the seller gave me a free sample :- broken piece of a longer header with 23x2. Okay to use if trim to 17x2, haha.
I think 5mm header is must. Let's think of a mcHF with LCD 10mm above the UI, it is very difficult to design the metal case.
Also, received my 3.2inch LCD today. Thanks.
Paul
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| « Last Edit: 24. January 2018, 11:17:53 by Paul C. H. » |
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I understand only two German words.
with help of this forum, I often change from "g-e-t-l-o-s-t" to "g-e-l-ö-s-t".
what in front of me was feeling of "f-u-n-k", now it is a piece of almost working "f-u-n-k"
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Paul C. H.
Neuling
Offline
Posts: 23
Ich liebe dieses Forum!
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Re:LCD 3.5" DF8OE/SP9BSL
« Reply #63 on: 24. January 2018, 15:44:11 »
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Yes, 5mm is mandatory. Using this header button caps are ~2mm off the case and encoder knobs do fit. Here in Germany you can buy these headers i 1pcs. amounts.
I am astonished that it is difficult in China! I thought China is the paradise for DIY...
vy 73
Andreas
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Yes, easy and difficult!
9mm headers are easy to find. I asked approximately 7 or 8 sellers and only 2 provides 5mm header.
Sellers here keep samples of many products in a very small stall of only 1 square meter.
They are reluctant to retail sell their samples, and leave enough samples available for big-deal customers, hope if you or Chris go there and order one container of parts.
The 3.5" LCD actually works. It didn't work yesterday only because of my wrong assumption (no solder temporary connection)
Paul
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I understand only two German words.
with help of this forum, I often change from "g-e-t-l-o-s-t" to "g-e-l-ö-s-t".
what in front of me was feeling of "f-u-n-k", now it is a piece of almost working "f-u-n-k"
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F4HTX
schon länger dabei
Offline
Posts: 66
Scotty, energize...
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Re:LCD 3.5" DF8OE/SP9BSL
« Reply #64 on: 18. February 2018, 11:06:49 »
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Dear Friends,
I am not sure where to post this, but anyway you might like this one...
After a couple weeks overhelmed by pro, I came back to my OVI-40 UI board, so I plugged it in, updated the bootloader and the firmware.
When I rebooted I was asked to calibrate the touchscreen, no problem it was expected but... impossible to enter the calibration screen, no way !
The touchscreen IC showed up in the menus, but no touchscreen working (it was working in the first place indeed).
I spent a significant amount of time searching the cause, finally here the story :
I got very early birds of the production of those screens, with the sdo line and some components in the wrong orientation (Andreas, even Spock sleeps from time to time  ). In order the straighten things, I unpopulated then repopulated the boards, cleaned it (isopropyl alcohol) and everything went fine.
But... when cleaning with isopropyl, a mix of it with the cleaned flux entered the J106 connector and after a couple weeks, the connections becamed unreliable.
I cleaned the connector and the ribbon, let both of them dry and... tada!!!
So when you clean things, you should beware of connectors, encoders, plugs, ...
73's
François
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SP9BSL
positron
alter Hase
Offline
Posts: 443
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Re:LCD 3.5" DF8OE/SP9BSL
« Reply #65 on: 18. February 2018, 12:04:44 »
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Hi François,
yes, this is often problem with dirt in connectors came from soldering, especially with the one you can't see (inside of the J106). Be aware of the pins of J103 also, I had problems with 2.54 conector too. I know this pain, spent about an hour seeking what is wrong... Isopropyl solvent is the good helper.
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73 Slawek
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F4HTX
schon länger dabei
Offline
Posts: 66
Scotty, energize...
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Re:LCD 3.5" DF8OE/SP9BSL
« Reply #66 on: 18. February 2018, 13:38:51 »
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Hi Slawek,
You are right isopropyl is a good friend. What is new for me here, is that it was working and faulty after a couple week of drying...
By the way about J103, cutting the end of the pins might not be the best idea as it damages the female connector each time it's inserted, by scraping it.
I would rather solder the pins at the right depth and then cut the pins flush to the pcb, in order to get the J103 pins undamaged, and so the female connector on the UI board.
73's
François
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SP3OSJ
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Re:LCD 3.5" DF8OE/SP9BSL
« Reply #68 on: 18. February 2018, 14:04:01 »
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It has to be done
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SP3OSJ
Guest
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Re:LCD 3.5" DF8OE/SP9BSL
« Reply #72 on: 18. February 2018, 15:34:15 »
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I will be happy if you want to use and copy something.
No problem.
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Pages: 1 ... 3 4 [5] 
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Firstly RF-PCB must be ready and some other work must be done - then designing of cases will start.
