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Week 10:
The assignment is to design and make a board with a sensor, i'm going to use LDR "Light Dependent Resistor" as a sensor.
STEP 1: Design the Circuit.
You need (Attiny45, Cap 1uF, 2 Resistors 10K, LDR, ISP Pin Header, 6-Pin Headers) to design your circuit
![](Input/Screenshot_7.png)
After finishing the schematic you need to layout the board the step which i consider one of the most difficult steps in electronics production and it needs alot of practice and experience.
![](Input/Screenshot_1.png)
Exported the monochrome, 500 DPI image and opened it in GIMP.Then added about 20 px to width and height and exported the boarder as well.
![](Input/Input.png) ![](Input/Boundary.png)
STEP 2: Mill the circuit.
using Fab modules import the traces image first and choose 1/64 endmill and make the path, send it and mill it !! after that you need to load the boarder png and change the endmill to 1/32 and cut out the boarder to get your board.
STEP 3: Solder The Circuit
It was a quite easy process, be careful and conenctrate and sting like a Cobra and everything's going to be alright.
![](Input/IMAG0150.jpg)
STEP 4: Programming
To make sure that everything has gone right i needed to upload a code which write the sensor readings in the serial monitor using Arduino IDE, SoftwareSerial library.
![](Input/hg.png)
It Worked!! you could see all reading appeared on the serial monitor.
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