Assignment requirements:

Group Assignment

• Probe an input device(s)'s analog and digital signals.
• Document your work (in a group or individually).

Individual Assignment

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

Learning outcomes:

• Demonstrate workflows used in sensing something with input device(s) and MCU board.

Assessment criteria

• Linked to the group assignment page.
• Documented what you learned from interfacing an input device(s) to microcontroller and how the physical property relates to the measured results.
• Document your design and fabrication process or link to previous examples.
• Explained the programming process/es you used.
• Explained problems and how you fixed them.
• Included original design files and code
• Included a 'hero shot/video' of your board

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Group Assignment

In this week we will learn more about Input devices.

Temprature

In our group assignment we were trying different sensors to see how do we get a reading, how a physical property is measured.

• We tried the temperature codes in input devices page temprature secion using NTC.

Light

• We tried the IR visible codes in input devices page light secion.

Analog & Digital

• We used the oscilloscope to display a digital and analog signals, when i tried to use the oscilloscope I had some problems understanding how to use it and this video helped alot.
• Using a simple example code with the ATtiny44 board we were reading the input from and LDR sensor.
• once from the DO and once from the AO.

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Practice

Step Response

Sensing with Step Response example.

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Individual Assignment

Using different input devices I learned how some devices are used to measure the physical properties.

That can be done by using a capacitive material that will change it's capacitance depending on the medium it touches like it the step response example.

Or by some materials that differs in resistance which corresponds as a voltage change which makes us able to calibrate that change to that physical property and make it measurable, such as temprature and light sensors.

Some sensors have a transmitter and receiver in it to send a wave or light and receive it again and by that we can detect motion or measure distance by calculating the time between the sent and received signals, like in microwave and ultrasonic sensors.

Motion

• Using my ATtiny44 board with the microwave sensor and hello code I made the motion example and it was cool.
• Microwave sensor connection is simple only a VCC, GND and Signal.
• hello.RCWL-0516.c.
• hello.RCWL-0516.py.

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