Fl3xWatchOLED

OSHpark mail package showed up today. It's long waiting rev4.0 Fl3xWatchOLED PCBs. Last time sadly no sticker came with pcbs, so I contacted OSHPark and they kindly includes tons of them. Anyway, here's some pics of them.

I've tested the circuit. Good news is the 10 volt boost circuit work pretty well, all electrical characters met what I wanted. Sadly the bad news is the connector seems to be happy with faced down FPC. which it's means that I need to use the connector in reversed connection. Thus the display will now facing down. To reverse this, I need to put the FPC on another side of PCB, so the display can face up toward us but face down relative to the connector. Another PCB rev, Another PCB batch. Another 2 months 😥

after long months of waiting. Flex PCBs finally arrived from @oshpark all the way to Thailand. And here the PCBs

(sadly I didn't get the sticker along with these 😭)

Very very soon (probably next 2 weeks). I will receive the rev 3.1 flex board from OSHpark and probably next month I will receive the boost IC and other passive components from China. so stick around for the first prototype!

on rev3 I decided to swap the LTC3459 out due to cost reason and replace it with FAN5331SX. A far cheaper boost IC. The latest schematic (rev2) and board (rev3.1) are now available on GitHub and OSHPark!

I changed the ground plane from solid copper into mesh-like ground plane to improve flexibility, new rev PCB can be found here at OSHPark as well as on my GitHub repo.

Right now I be able to complete the Time / Date setting part of the watch, so overall features are

- Display Time in this format

Current Time:
HH:MM:SS

- Display Date in this format, Note that XX is 01-99

Current Date:
MON--01/01/20XX

 - Left / Right Joystick button is for navigating through menus (now only two, Time and Date).

- To enter the setting mode, just navigate to Time menu or Date menu, and double press the center joystick button. Use Left / Right button to move the cursor (underscore as a cursor), Up / Down button for Increase / Decrease the value.

- Leap year capable, 29th FEB supported, month 13 proof.

- Left handed mode (still using in-code #define, Will make the proper setting menu later).

Update : I came to an agreement with seller that I will bought another one with some little discount. But I ended up paid full amount by accident (I should've wait the seller for the new listing ;P). So the excess is for another cheapo 128x64 OLED display. 

yesterday I received the adapter PCB. After some code debugging I be able to get the display up and running. However, the Display panel seems broken by some unknown reason. Only middle region looks normal but around them look really faint. I use the command 0xA5 to turn all the dots on and that confirmed that the display is broken. I contacted to seller waiting for reply today after I talked with the seller last night. More about this soon but here's is the image of it up and running.

You can get the latest PCB revision by the link at README.MD here

After long day of headache and eyestrain. I Received the connector today. Moment that I unpack it. I realized that my PCB design was wrong the whole time. instead of the connector side facing out of the board, It's facing in. So Total redesign from rev1.0 to 2.0 (still same dimension). 

I already code the code that will be running on the actual watch, the link included in this project link. Also here too. The code still W.I.P. and never tested since I don't receive the dev board adapter yet (forgot to order with OSHPark's super swift🤦♂️).