An adapter made to connect my DS18B20 floor sensor to my thermostat that only accepts an NTC 10k as an input. Here the Arduino reads out a measurement from the Dallas sensor, converts it into corresponding NTC resistance value and emulates an NTC sensor by setting corresponding voltage level on the thermostat input jumper.
I used an Adafruit MCP4725 Breakout Board which I soldered together with the Arduino board like a sandwich. This way I managed to make the assembled device tiny.
Also, I didn't use an external pull-up resistor for DS18B20 and used the built-in one on D3 pin. Data pin D2 is then soldered to D3.
table.py script is used to pre-generate a conversion table from temperature to DAC value.
