Antichambre

I found it, there's isopropyl inside but not pure List of ingredients isopropylalcohol Hydrocarbons, C6-C7, isoalkanes, cyclics, < 5% n-hexane ethanol; ethyl alcohol methylal 1-ethoxypropan-2-ol carbon dioxide 2-ethoxypropan-1-ol methanol

I know we are on a DIY platform;) But sometimes it is better to invest in tools and consumables than to damage one's own work. Isopropyl will do the work but there is a risk of not stopping there and attacking the varnish and all the plastic components. So go for it with delicacy. Personally I use a French brand that does not melt soldermask, silkscreen or plastic. I'm sure you can find the equivalent near you. Translated name is "low surface tension flux cleaner", exact composition is not specified. Best Bruno

You call it 3 times!!! maybe "Evil" is in your circuit!!! And we have to call an exorcist now!

I found it in previous page of topic, but there's too much flux residue on the back of your board to discern something. There's already some suspicious pads like those: Maybe this is just reflect, and it's difficult to see the relief from a top view picture... I suggest you to clean all pads with paste flux and iron, no need to add more solder, then clean the board(good flux remover) take a picture and share with us please. This is the paste flux I use: Best regards Bruno

I suppose R33 is in the good way too?

Hello, Maybe you already did it also? But Diagram + multimeter and continuity testing of all the tracks between the STM board and the LCD, Maybe

Because you already own it... of course ;) I also continue to use it a lot, this board is very small and thin. Best Bruno

You're welcome, don't worry! I don't know why you choose to use the lpc17 core? Surely for good reason but if not, have a look to the STM32F4 version, it's the same 32 bits OS, this last CPU is just more powerful, you will find more help and advise about it also. Best

Have a look on this post, it can help you too. Best

;)

I did it, LPCXpresso1769 with CMSIS-DAP is working without any firmware and pinout change! Sure! If you prefer to use the old version you can find it at Lextronic web site, it's a french shop and it remains some stock of the old one. Best Bruno

Yeah! It's fine!!! But "Everything" I don't know as you can see I use it in a very minimal configuration ;) I'm sure it's working fine on USB power, I tried a direct EXT 5V power to the Main board, fine too of course! I try it before you explain it in the Wiki and we did the same thing, opening BOOT1 surface jumper, removing OSC2 components and FLG/PA5 jumper to get J16 working. I made another test for J18, with 2 others LPC Cores on the same CAN bus, It's working too ;) You respect the original discovery pinout so... no bad surprise during bootloader and firmware setup. You thought it simple and easy, this goal is clearly achieved! :)

Great! Pre-order ? ;) ...Keep me in touch! Best Bruno

It should be interesting to get the value you found and which brand you use ;)

In theory, Max PCB height should not exceed 112mm. Formula is: 3(RU)*44.45 - 21.35 = 112mm But Eptheca is right, in practice this can vary. See this muff topic. Best

Hi, Purple layout and picture are not the same. Purple one is a prototype and not for sale. Picture is the new one, Andy’s Design! Around Waveshare core. Best regards

Sometimes after a lot of test and try, I loose connection... Then I restart everything and it connects again. But, "not connected and still load hex" never happens to me. You're welcome. Best regards Bruno

Using TLC59731 ? One RGB Led, This is 3 channels driver. A 32-Bit Data Packet. 8bits command + 3x8bits(RGB). The goal is to relieve the CPU and facilitate the design of the layout. It requires 3 resistances too, but it's only one line between each driver, between each RGB pot. It's 8 pins SOIC package, not too big or too small. In datasheet page 18, it says "There is no limit on how many devices can be cascaded, as long as proper VCC voltage is supplied." Best Bruno

About djtechtools, they provide me some samples and the contact for bulk discount...

Configuration bits seem fine too. Check the OSC, Q1 on board. Replace it maybe...

Yes this option must be checked!