Heated Decal Bath

#Heated Decal Bath

##Background
Application of water-slide decals on scalemodels goes a little bit easier if the water is warm.

This project is based on a FDM 3D printed frame and some electronics that controls PCB heatbed of approx 8 Ohm. An external 12VDC/2A power-plug is needed as well. The UI consist of a 0.96" OLED display with 128x64 pixels, using the SSD1306 controller, two LEDs and three buttons.

##Design and other resources
The mechanical design is made from FDM 3D printed parts, preferably printed in PETG (but PLA should be OK also).

The lightguide and display lens should be 3D printed with transparent resin using a SLA printer. Print them flat on the bed. They can also be scratchbuilt with 4mm acrylic rod and 3mm acrylic sheet (but that is a lot more work).

The metal tray is from IKEA: https://www.ikea.com/gb/en/p/vinter-2020-5-pastry-cutters-with-tin-assorted-shapes-30474525/

I used the following fasteners:
Frontpanel: M3x6
Front PCB: ST2.9x6.5
Contr