5. Encoders, OLED and controller - TweetyDaBird/Lotus-58-Classic GitHub Wiki

Please solder RGB LED's before adding the OLED screen and/or encoder.

Soldering these large components to the front of the PCB means it cannot lie flat, and unless you have a good solder stand to help you hold the PCB, its very difficult to solder the RGB's in place after these have been added.

7. Encoders and OLED screens

Adding the optional Encoders

The encoders can be soldered in two positions, when using the upper corner position, you need to prepare the encoder by cuttings the legs near flush with the PCB to avoid interference with the controller that is mounted directly underneath the PCB in the same place. To finish the solder with a flush cut leg, and the controller in place its necessary to apply heat and solder from the topside of the PCB. Obviously, this doesn't apply if the controller is socketed.

Adding the optional OLED screens

Place the OLED screens on the front side of the PCB, and solder them in place. Placing them flat on the PCB means they will be ever so slightly recessed in the plate. With some finesse, measuring against the assembled plate first, you can support them from underneath and solder them entirely flush with the underside of the plate. If you do this, it's recommended to permanently support them in some way (thick double sided tape/pad or similar).

If using a kit supplied by me, the pins on the OLED display are pre-soldered and you need to file the tips of them down somewhat to get a perfect flush fit with the plate. Or alternatively re-solder the pins as flush.