Page 87 - Robot Design Handbook ROBOCON Malaysia 2019

2.3.2 Messenger Robot 2 (MR2)

START

LDR Module
(Arduino A0)

Arduino 1 NO
pinMode (relay, OUTPUT)
pinMode (LDR, INPUT)
AnalogValue =
analogRead(A0)

YES

Relay Module
#define Relay 10

END

Figure 6: Flow-chart of the Messenger Robot 2

The flow-chart above shows the first part of the system where the LDR will be

connected to the analog pin of the Arduino 1. The LDR will detect the difference of light
intensity when the Gerege is placed on the slide located on the top of the MR2 body. The

difference will give signal to the Arduino 1 and trigger the Relay to supply voltage to the
Arduino 2.

83