Album with all the pictures : https://imgur.com/a/ms56Zkc
I had this in mind since I started thinking about making my own drivers early last year, I actually assembled a driver for the SC64 last July but it didn't work properly, probably a mistake while building it since I’ve made other similar driver that worked, anyhow that was before Gchart implemented DAC control for the Attiny1616 so there was quite a lot of components on the tiny board, using the DAC instead of filtered PWM control reduces the amount components needed and simplifies a lot the layout, which is already quite constrained by the cutouts for the original components.
The first step was to take a good picture of the cutouts, trace them and import them to Kicad, then I could layout the components to match the cutouts.
Then a good while later (lot of procrastination...), assembly :
I forgot to take pictures but the thermal copper block is made of two part soldered together, the bigger visible part and a small one in the PCB cutout, I don’t have any milling machines so I couldn’t make it in one part.
Top components, with dedomed 519A sm453 :
Initially the AUX LED was only to be used with a TIR lens, but I couldn’t find a narrow angle lens that produced a nice beam, so I decided afterwards to go with a button LED and made this flex board to shine the LED towards the button boot, the original boot is opaque so I used a D4V2 white boot, it’s nearly the same size.
Assembled in the host, and ON at the lowest level :
Fully assembled :
(The switch retaining ring is not fully in, not because it doens’t fit fully but because I’ll need to remove it soon, it pretty hard to pop out)
Unfortunately only the top half of the boot is lit, I could have added an LED for the lower half on the back of the PCB but didn’t plan for it Initially.
Next to the SC64LE on min level , and tint comparison with LE and w HI on M1:
It’s kind of difficult to picture tints, it’s not as pink in reality, and the other two ones are a bit greener.
TM-30 reports, I’m using an AR coated lens from Kaidomain, it increases duv by ~0.0005~0.001, duv is quite low after the dedoming so it’s fine and I gain a few percent of light transmission :