search

ahuber21 / coffee-grinder-scale

ESP32 project for an Eureka Mignon coffee grinder mod
GNU General Public License v3.0
2 stars 0 forks source link

diagram of wiring and components #1

Open tomergam opened 3 months ago

tomergam commented 3 months ago

Hi, very nice job with this project

maybe you got diagram of wiring and components ... your grinder got gpio of control? or you used relay to 220V?

ahuber21 commented 2 months ago

Hi @tomergam, you find all components and the wiring I used in jousis' repository: https://gitlab.com/jousis/espresso-scale. It's just the stuff I had lying around. You can simplify the hardware a lot and the code changes shouldn't be too difficult.

The grinder itself is controlled through a transistor attached to GPIO4. Controlling Eureka grinders is absolutely straightforward since the push button signal is broken out on the PCB. You just need keep it HIGH while the grinder is supposed to run. Coincidentally, the logic on the EU version of the grinder seems to be running at 3.3V, so no logic level conversion is required. And of course no controlling of HV (220V) either. More info can be found in the Video I linked in the README: https://www.youtube.com/watch?v=ksemL5_kvDw