Mr. Tipakorn Sumeteenarumit

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 voltage divider circuit because the sensor gives resistance, it can
adjust 0 - 100 kΩ. The microcontroller can't use resistance but it can use voltage. I have using three
resistors in voltage divider circuit, the three resistors can regulator scale voltage 0.5 v to 4.5 v from
calculate. I have tested and measurement voltage divider circuit, It's can regulator scale voltage 0.4
v to 4.6 v because the resistor born error.
R3
V3 = E
RT
E
IT =
RT
Figure 1.Tested and measurement
voltage divider circuit of sensor
Calculate Measurement
V70° = 1.9004 V V70° = 1.8838 V
V100° = 3.0788 V V100° = 3.0621 V
V120° = 3.5236 V V120° = 3.5089 V
V190° = 4.3474 V V190° = 4.3394 V
From calculate and measurement voltage divider circuit of sensor. I have design circuit by
program for PCB and I have tested voltage divider circuit again.
Engineering Analysis
Strong Point
- Use the voltage drop of resistance from measurement voltage sent to microcontroller.
- Calculate and measurement voltage divider circuit of sensor
Weak Point
- The resistor born error.
Next Week Job
- Present project.
- Finish rice cooking project
Department of Control System and Instrumentation Engineering
KING MONGKUT’s UNIVERSITY OF TECHNOLOGY THONBURI