KAIST 7: Festivals in Daejeon City

What I have learned in Korea?

Deajeon has been holding two international festival s: the International Cooking Festival and the Hotspring Festival since last week. Hubo lab was supposed to have a showcase at Deajeon Convention Center for the International Cooking Festival. However the showcase got cancelled because the North Korean governments announced that they would practice launching the nuclear missile in a few days before the showcase day. Hubo is operated and controlled by the wireless network and that kind of connecting method with any device is not allowed in public area. It was really sad when I heard it from Jeonwoo who is in charge of Hubo’s walking trajectory. As people may know Korean peninsula has been divided into two independent countries which are South Korea and North Korea; and their governments’ systems are democracy and communism respectively. The Korean War was occurred in the early 1950’s and so the Korean peninsula has been invisibly in dead silence for about 60 years. In recent period the North Korea has been attacked South Korean territory. Even though it didn’t make any huge damage on the people or the facilities they broke the peace treaty which was concluded after the Korean War.

The status of research

The goal of this week was to build up a DC motor controller by encoder wheel. The hardware and software were successfully built up (the in & out voltage amounts were checked by a voltage tester). In Theory QEI input signals produced by the encoder wheel and the motor encoder are saved in the QEI register in PIC chip. Those data go through the process which compares the moth signals from each device as through the programmed code; and the compared QEI signal determines the value of duty cycle. The duty cycle adjusts the ratio of high and low PWM (Pulse Width Modulator) output signals and this ratio controls over the amounts of speed and rotation of the DC motor. To check whether the PWM signals work properly the voltage amounts were checked by a voltage tester; and so if the hardware is correctly connected, the each high and low PWM signals should be properly adjusted by the PWM ratio. However I am having a trouble with debugging. I am not quite sure if the problem comes from hardware or software. Therefore I would like to approach to the way to find the origin where the problem occurs.