WEEK1
In this week, we mainly performed four activities about out project.
Firstly, we analysed the circuit we would build in our project. We had already received the four major components which are Arduino Uno, D6T, MC21609AB6W-BNMLW (2x16 LCD) and buzzer. However, if we wanted to connect three other components to Arduino, we may need another several elements between each component and Arduino. For D6T, we checked its datasheet and found that its interface is I2C. In order to connect it to Arduino, we need the both house and contact of I2C with proper size for D6T. For 2x16 LCD, there are 8 data bus lines named D0-D7, which indicates that LCD receives the data in parallel way. However, the output data of Arduino Uno is in series. To make two LCD and micro-processor compatible with each other, the series-to-parallel shift register called 74hc595 is required. As for the buzzer, even though the output circuit 40mA is enough for driving buzzer whose rated current is 33mA. The resistance should be added into the circuit between Arduino and buzzer to protect the circuit, which may make the current too small to feed the buzzer. Therefore, a transistor is required to amplify the current and plays the role as switch.
Secondly, we searched those components we would need on the websites of allowable companies and ordered them with the help of lab managers.
Then, we read and studied the datasheet of the components we would use. We also learnt how to convert series data into parallel and how the interface of D6T (I2C) works.
Firstly, we analysed the circuit we would build in our project. We had already received the four major components which are Arduino Uno, D6T, MC21609AB6W-BNMLW (2x16 LCD) and buzzer. However, if we wanted to connect three other components to Arduino, we may need another several elements between each component and Arduino. For D6T, we checked its datasheet and found that its interface is I2C. In order to connect it to Arduino, we need the both house and contact of I2C with proper size for D6T. For 2x16 LCD, there are 8 data bus lines named D0-D7, which indicates that LCD receives the data in parallel way. However, the output data of Arduino Uno is in series. To make two LCD and micro-processor compatible with each other, the series-to-parallel shift register called 74hc595 is required. As for the buzzer, even though the output circuit 40mA is enough for driving buzzer whose rated current is 33mA. The resistance should be added into the circuit between Arduino and buzzer to protect the circuit, which may make the current too small to feed the buzzer. Therefore, a transistor is required to amplify the current and plays the role as switch.
Secondly, we searched those components we would need on the websites of allowable companies and ordered them with the help of lab managers.
Then, we read and studied the datasheet of the components we would use. We also learnt how to convert series data into parallel and how the interface of D6T (I2C) works.
Last but not least, we sketched the initial version of our circuit. Since there was no D6T component in the library of software Fritzing, we chose the component with the I2C interface to replace it.
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