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Pegoku08

I designed a drop-in replacement PCB for the Sunlu S1 filament dryer.

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I built a small drop in replacement controller PCB for the Sunlu S1 filament dryer because the stock board is very limited

It keeps the original heater, and power wiring, but adds a color TFT, proper temperature and time control from 30 to 70 ºC, dual NTC sensing for air and heater safety, and PWM heater regulation. Everything runs on an STM32C011, and the full firmware fits in about 13 KB of flash.

The goal was reliability and control rather than fancy features. If you are frustrated with the S1 presets, this might be useful.

GitHub repo: https://github.com/Pegoku/Sunlu-S1-Board

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    DoktorWizard

    I've been working on one as well. Sensors are so cheap, planning several temp and humidity sensors both inside and out and intelligent control of a ventilation fan only under correct conditions.

    I may "borrow" some of your ideas!

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    HeavyCaffeinate

    Waow

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    furculture

    Very nice. I'll have to look into it once I get my dryer from the cargo crate it is in.

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    L00kAdistraction

    Are you going to upload the Gerber files so I can order myself a PCB lol

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    Pegoku08

    The gerber is available here

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    L00kAdistraction

    Awesome, Thanks for this!

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    krefik

    I'll have to take a look if it's possible to adapt this to Creality Space Pi. The controls suck, and the screen was half broken after a month.

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    Hichiro6

    I ve a dryer with max temp 50 degrees, can I dry PETG on it if I dry it for 12-16 hours ?

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    Judman13

    Wow that's incredible! Mine has started cutting off way before the set times and it drives me nuts. I was playing with the idea of building out a board with an esp32 to connect to home assistant.

    You design looks amazing!

    Edit: darn one thing this is missing is humidity sensing =(

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    Pegoku08

    Yeah, I wanted to add wireless and a humidity sensor too. Prob going to add it for next version

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    Judman13

    I was planning to use a Bme280 since it's what I ad laying around and just wiring it into side or back of the case somewhere.

    I am not as sophisticated as you haha

    Do you have any pictures of the finished pcb and placement of the second ntc?

    Again this is great work and I'll be keeping an eye out for version 2!

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    MIGHT_CONTAIN_NUTS

    Can you set custom presets? I'd love to be able to hit a button for ABS and have it set the temp to 65c and start a 48hr timer all on 1 go.

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