Netduino Temperature Control System

1. SMOKER
NETDUINO TEMPERATURE CONTROL SYSTEM
@JESSEPHELPS
JESSEPHELPS.COM

2. Platinum
Sponsors
Gold Sponsors
Silver
Sponsors

3. PARTS
2x - 16” Terra Cotta Pot
http://www.homedepot.com/p/NorcalPottery-16-in-Terra-Cotta-Pot100043021/100333338

4. PARTS
18 1/2” Kettle Grill Charcoal Grate
Actual Diameter 15”
http://www.homedepot.com/p/WeberPlated-Steel-Charcoal-Grate-for-18-1-2in-Kettle-Grills-7440/100683984

5. PARTS
Oster Single Burner
http://www.walmart.com/ip/24183268

6. PARTS
Netduino (2, Plus 2)
https://www.sparkfun.com/products/1166
3
http://www.adafruit.com/products/1228
http://www.makershed.com/ProductDetai
ls.asp?ProductCode=MKND06

7. PARTS
Taylor Thermometer Probe (Thermistor)
http://www.amazon.com/TaylorReplacement-Thermometer-Stainless1470NBRP/dp/B003BX64M6/ref=pd_sim
_k_2

8. PARTS
TDK Lambda LS25-5
5V Power supply – 25W
http://www.digikey.com/productsearch/en?mpart=LS25-5&vendor=285

9. PARTS
Solid State Relay (SSR)
3VDC Input Voltage
48-480VAC Output Voltage
10 Amps
http://www.zorotools.com/g/00062838/kG1452622

10. PARTS
2.5mm audio jack
http://www.digikey.com/productdetail/en/MJ-2506/CP-2506-ND/281261

11. THERMISTOR

12. VOLTAGE DIVIDER
• Vout = Vin * R2 / (R1 + R2)
• Vin = 3.3V
• R2 = 100k
• R1 = 100k @ room temp

13. STEINHART–HART EQUATION
• 1/T = A + B ln (R) + C (ln (R))^3
• T = Temperature in Kelvin
• R = Resistance
• A, B, C = Constant determined experimentally

15. QUESTIONS?