A simple board to hold six DS18B20 temperature sensors
J2 is a jumper to select normal or parasitic-power mode. Short the middle pin to the one labelled 'n' for normal power mode. Short the middle pin to the one lebelled 'p' for parasitic-power mode.
R1 is a 4.7 kOhm resistor, though most sensors can tolerate as low as 2.2 kOhm.
If difficulties are experienced, test with shorter wires.
Raspberry Pi code to work with multiple sensors can be found here.
Adruino code can be found here.
The 3D printing plans for an Arduino UNO project using this board can be downloaded here.