Summary

Thermostat based on raspberry pi and an atmega328 with lm35z temp sensor. Heat your house and control it remotely using web app!

https://tinkercad.com/things/fNDb3uS8dOc

Instructions

Print the parts. Put a raspberry pi and a pcb inside to control your house central heating. I've finished it but need to draw out the schemetics for the raspberry pi add-on : it's basically an atmega 328, lm35 + 2 buttons and a led that is connected with a cd4050 to the raspberry pi that serves a mobile webpage for turning on/off the heating.

I added a seperate file for the buttons as the original ones needed glueing and did not fit well. The ones with stops fit snuggly and stay in place without glue.

I got power by using one of the unused cables from my doorbell phone/speaker ;). The only issues I have left is moving the led a bit upward so that it sits under the hole in frontpanel and adding the cd4050 buffer chip to communicate with the pi and add wifi stick to the pi...

ThermoPi casing