Inc281-54261512_1
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This weekly report discusses progress on a product design project. It describes testing a temperature sensor from 26-202 degrees C and measuring its resistance at different temperatures. A voltage divider circuit was created to regulate the sensor output voltage from 0.5-4.5V for the microcontroller. Calculations were performed to determine voltage values at specific temperatures. While the voltage output was obtained, it was found to be non-linear. Next steps include circuit design on a PCB and further testing.
![[INC 281 MULTIDISCIPLINARY WORKSHOP WEEKLY REPORT] April 19, 2012
Name-Surname Mr. Tipakorn Sumateenarumit <tum>
Student ID. 54261512
Group Name Conthai
tum54261512,rin54261504,golf54261520,chai54261522,
Engineering Team
dew53219012,golf53211804,banz53211811,champ53211819,
Members
june53211831,bank53211833,
Product Design
P’dukdik, P’ake, P’L, P’friend
Team Members
Weekly Progress
This week, I have tested and measurement the sensor of temperature 26°C - 202°C by 3
turn. I have saved resistance of temperature because I want make the rice cooking. But I can't using
resistance sent to the microcontroller. I have using voltage divider circuit because voltage can send
to microcontroller. I have using three resistors in voltage divider circuit, the three resistors can
regulator scale voltage 0.5 v to 4.5 v.
Figure 1. Measurement the resistance Figure 2. Voltage divider circuit
and temperature of sensor
Calculate, IT , V100°c , V105°c , V200°c . When R 1 = 1 kΩ, R 2 = 100 kΩ, R 3 = 1 kΩ.
E R3
ITmax = V3max = E
R Tmin R T min
5V 10 kΩ
= = 5V
11 kΩ 11 kΩ
ITmax = 0.45 mA V3max = 4.5454 V
From Calculate and measurement nearby output voltage, but output voltage non-linear.
I need microcontroller catch the output voltage.
Engineering Analysis
Strong Point
- Use the voltage drop of resistance from sensor sent to microcontroller.
- Test and measurement the sensor of temperature 26°C - 202°C.
Weak Point
- The sensor non-linear.
Next Week Job
- Circuit design by program for PCB.
- Test and run for the circuit
Department of Control System and Instrumentation Engineering
KING MONGKUT’s UNIVERSITY OF TECHNOLOGY THONBURI](https://image.slidesharecdn.com/inc281-542615121-120419204052-phpapp01/85/Inc281-54261512_1-1-320.jpg)
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Inc281-54261512_1
- 1. [INC 281 MULTIDISCIPLINARY WORKSHOP WEEKLY REPORT] April 19, 2012 Name-Surname Mr. Tipakorn Sumateenarumit <tum> Student ID. 54261512 Group Name Conthai tum54261512,rin54261504,golf54261520,chai54261522, Engineering Team dew53219012,golf53211804,banz53211811,champ53211819, Members june53211831,bank53211833, Product Design P’dukdik, P’ake, P’L, P’friend Team Members Weekly Progress This week, I have tested and measurement the sensor of temperature 26°C - 202°C by 3 turn. I have saved resistance of temperature because I want make the rice cooking. But I can't using resistance sent to the microcontroller. I have using voltage divider circuit because voltage can send to microcontroller. I have using three resistors in voltage divider circuit, the three resistors can regulator scale voltage 0.5 v to 4.5 v. Figure 1. Measurement the resistance Figure 2. Voltage divider circuit and temperature of sensor Calculate, IT , V100°c , V105°c , V200°c . When R 1 = 1 kΩ, R 2 = 100 kΩ, R 3 = 1 kΩ. E R3 ITmax = V3max = E R Tmin R T min 5V 10 kΩ = = 5V 11 kΩ 11 kΩ ITmax = 0.45 mA V3max = 4.5454 V From Calculate and measurement nearby output voltage, but output voltage non-linear. I need microcontroller catch the output voltage. Engineering Analysis Strong Point - Use the voltage drop of resistance from sensor sent to microcontroller. - Test and measurement the sensor of temperature 26°C - 202°C. Weak Point - The sensor non-linear. Next Week Job - Circuit design by program for PCB. - Test and run for the circuit Department of Control System and Instrumentation Engineering KING MONGKUT’s UNIVERSITY OF TECHNOLOGY THONBURI