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

For this exercise I decided to make an Arduino from scratch and then work in some breakout boards to make the inputs and outputs.

Based on Fabkit 0.4

Components:

- Atmega 328P

- 8 MHz external resonator

- Switch Button

- FTDI Communication

- 2 Unpolarized Capacitors 1206 0.1 uf

- Unpolarized Capacitor 1206 1 uf

- Electrolytic capacitor 10 uf

- Resistor 1206 10k

- Resistor 1206 499

- LED YELLOW CLEAR 1206 SMD

To write the bootloader I used the IDE from Arduino. It's necessary choose on Tools > Board > Arduino Pro or Pro mini (3.3V, 8) before and press the Reset Button when you are making the booloader

The aim of this class assignment was to create a microcontroller with an input device.

I am including this assignment for my final project. Initially I designed a shield with a limit switch, but that was really similar at button switch used 3 week ago. For this reason I created a microswitch using a photoresistor to try another sensor. I want to try infrared led and ultrasonic sensor soon.

I used the sensor as a resistor and I located a resistor 10k after the input trace to read the changing values. I used the led just for an immediate output and to calibrate the range of the sensor.

A photoresistor is a light-controlled variable resistor. The resistance of a photoresistor decreases with increasing incident light intensity. the electric current flowing through this component is proportional to the intensity of a light source. A photoresistor can be applied in light-sensitive detector circuits, and light- and dark-activated switching circuits.

Components:

- Photoresistor

- Resistor 1206 10k

- Resistor 1206 499

- LED RED 1206 SMD

- Header 4 pin

IDE Arduino Sketch to program the microcontroller:

Download Files