10. Input devices¶

Reguirements¶

Group project¶

Probe an input device’s analog levels and digital signals

The members of the group:

Achille
Anssi
Jari
Hannu

Group assigment in Jari page

Individual project¶

Measure something: add a sensor to a microcontroller board that you have designed and read it

Individual project¶

In my final project I have used Strain Gauge sensors. But now I want to get to know Ultrasonic Sensor HC-SR04.

I fabricated two PCB versions. Now I use version 2. It very good board also in Embedded programming, Input devices and Output devices weeks. I have documented the work in Embedded programming week.

Research¶

The sensors are Transducers, a device which send signal to Microcontroller. The sensor are devices which meter some physical phenomenon and send an output signal to Microcontroller. It is possible that a signal have to change with some other device before microcontroller can process a signal. A sensor signal could be analog or binary. A sensor could be also Passive or Active Sensor.

The processed sensor signals

Ultrasonic Sensor¶

Ultrasonic Sensor measure distance based on ultasonic echo. I used Ultrasonic Sensor HC-SR04 which analog active sensor.

Ultrasonic Sensor HC-SR04.jpg

Ultrasonic Sensor HC-SR04

Installation and programming¶

I installed Ultrasonic Sensor HC-SR04 to my Final project PCB (version 2) by using jump wires. This is documented in Embedded programming week - board

I programmed Microcontroller ATtiny1614 in PCB with Arduino programmer. I copy code for Ultrasonic Sensor HC-SR04 from page https://arduinogetstarted.com/tutorials/arduino-ultrasonic-sensor and edited it. This is documented in Embedded programming week - programming