There is work to add a farm to ProMicro in the middle of implementation, but it is time-consuming to prepare the environment for building the farm, so it is recommended to start with it first.
https://docs.qmk.fm/#/newbs_getting_started Refer to here etc. and install the necessary ones according to the OS (it takes time to install, so it is efficient to run while running while proceeding).
## Implementation
Since the PCB is reversible, first decide which one to use for the left or right.
On Corne Cherry it is up to you to choose which side to attach, but with Corne Chocolate you must ** be sure to attach it to the back **.
Mounting on the surface will interfere with the top plate.
Since the chip parts are very small, it is easier to work with tweezers and adverse tweezers.
** Since the mounting direction of the diode is determined **, it is possible to proceed smoothly if you arrange the columns and rows to be mounted in advance as shown in the following photo.
The direction of the diode is as follows. Attach the chip component so that the “|||” mark is facing the “|” of the diode mark “| ◁” (image is posted from Corne Cherry).
Next, solder one of the diodes by melting the spare solder.
At this time, it is recommended that you use inverted tweezers so that you can hold the chip part firmly without applying force and concentrate on alignment and soldering.
Also, if the soldering iron is too hot or the solder is touched too much, the flux contained in the solder may evaporate and a solder pile may be formed neatly, but since it can be repaired later, at this point just be aware of attaching parts. It's okay.
If the amount of solder on the pre-soldering side is small, perform additional soldering, and if it is peaked, apply flux from above and heat to clean.
When using the spring pin header, please refer to [Helix Build Guide] (https://github.com/MakotoKurauchi/helix/blob/master/Doc/buildguide_jp.md#pro-micro).
We recommend that you check the operation at the stage where the ProMicro and OLED modules are attached (it is difficult to isolate the problem at the end).
Before checking the operation, insert the crkbd firmware into ProMicro by referring to the “Firmware” section below (be sure to insert it on both sides).
Operation confirmation is performed by connecting the left hand side to a PC with MicroUSB and connecting the left hand side and the right hand side with a TRS cable. Since there may be a defect such as a jack, make sure to connect the left and right instead of one by one before checking the operation. If you have done this correctly, short-circuit the pad to attach the PCB socket with tweezers etc., and the key pressed on the OLED module will be displayed.
The LED can be mounted even after completion, so if you are worried about mounting it, we recommend that you skip this chapter and complete it first.
SK6812MINI is very heat sensitive and breaks easily.
We recommend using a soldering iron with a temperature control function and operating at a temperature of about 220 ° C to 270 ° C.
Even if the temperature is adjusted, if the iron is left on the LED for a long time, it will be damaged, so try to solder as quickly as possible.
Solder four LEDs at a time, but we recommend soldering two at a time instead of four at a time to prevent the LED temperature from rising, as this will make it harder to break.
First, check the mounting position.
Solder 1 ~ 6 so that the back side (Undergrow) shines, 7 ~ 27 so that the front side (Backlight) shine. Below is the location to attach the LED (image is posted from Corne Cherry).
For 7 to 27, perform soldering so that the largest pad surrounded by a circle and the silk mark indicated by an arrow are adjacent to each other, as shown below.
If everything can be successfully soldered, it will glow as follows.
If the LED lights only halfway, the LEDs are connected in the order of the numbers. Therefore, suspect that the LED that does not emit light or the previous LED is incorrectly soldered or damaged.
