User Manual

156
Lesson 35 Intelligent Temperature Measurement System
Introduction
In this experiment, we will use some modules together to build an intelligent temperature
measurement system.
Components
- 1 * Raspberry Pi
- 1 * Breadboard
- 4 * Jumper wires (Male to Male, 2 red and 2 black)
- 1 * Network cable (or USB wireless network adapter)
- 1 * Active Buzzer
- 1 * RGB LED Module
- 1 * DS18B20 Temperature Sensor
- 1 * PCF8591
- 1 * Joystick PS2
- 2 * 3-Pin anti-reverse cable
- 1 * 4-Pin anti-reverse cable
- 1 * 5-Pin anti-reverse cable
- Several Jumper wires (Male to Female)
Experimental Principle
It is similar with lesson 26. The only difference is that we can adjust the lower limit and upper
limit value by joystick PS2 when programming.
As mentioned previously, joystick PS2 has five operation directions: up, down, left, right and
press-down. Well, in this experiment, we will use the left and right directions to control the
upper limit value and up/down direction to control the lower limit. If you press down the
joystick, the system will log out.
Experimental Procedures
Step 1: Build the circuit
Raspberry Pi T-Cobbler DS18B20 Module
GPIO7 GPIO4 SIG
5V 5V0 VCC
GND GND GND