Electronics Design

Calculating to milling the board

The Instruction to cut the ISB

 

the cut depth = 0.85 mm

The stock thickness = 2.3 mm

Calculate and send to machine

 

 

 

After trace the layout for the ISP

 

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Soldering the ISP

Using SMD Components

 

The Electronics Components that used for the module:

• 1x Attiny 44
• 1x 499 ohms
• 2x 10Ω Resistance
• 1x uF Capacitor
• 1x 2x3 in pin-header
• 1 6 pin-Header-Male
• 1x Button
• 1x LED

 

It takes one hour to finalize the soldering

 

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Redo The board

Using carvey cnc machine

 

The Electronics Components that used for the module:

 

I have add my name to the ISP Trace Layout

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Final results

 

 

Testing the PCB (Program it)

 

schematic diagram regarding hello board

 

 

Reading the microcontroller data sheet

 

Connection diagram pins to be able to programme the circuit

 

a step before program it

 

After obtaining the microcontroller pin diagram and checking the Arduino pins, I connected two boards together as the following:

Arduino Pins	Attiny44 Pins
5v	1 (VCC)
GND	14 (GND)
10 (digital pin)	4 (Reset)
11 (digital pin)	7 (MOSI)
12 (digital pin)	8 (MISO)
13 (digital pin)	9 (SCK)

 

Note: to determine the microcontroller pins, you have to see the dot or notch (in Attiny44 there is a dot) and you can count the pins as shown below:

 

 

I’m going to use jumper wires (male to female) to connect the boards as I mentioned above and as the diagram that I have done:





The circuit after doing the connection using jumper wires:

Then, and before connecting the circuit to the laptop to do the programming, I have to check the IDE program that I have if the Attiny boards are defined or not. I checked by clicking on Tools>>Boards but it’s not installed. To do that, I copied the following link:

https://raw.githubusercontent.com/damellis/attiny/ide-1.6.x-boards-manager/package_damellis_attiny_index.json


And I clicked on file>>preferences

 

 

And paste the link there to define the boards packages from the link

 

Clicking OK. I closed the program and run it once again to check the updates. Now, I should install the boards packages called Attiny. To install it, I selected Tools>>Boards>>Boards Manager

 

I searched using the word Attiny, it’s only one package to install, I clicked on install

 

And I saw “installed”. Now I closed the program one more time and I checked the boards once again, It’s there

As I planned to use the Arduino Uno as ISP, I have to upload the code that makes the Arduino ready to transfer the upcoming codes to my microcontroller board. I selected the board Uno from Tools>>Boards. Then selecting the code that already exists on the same program from File>>Examples>>ArduinoISP>>ArduinoISP

 

 

I opened the code, and finally before I upload the code check the port from Tools as well. It should be defined and marked as one of the com’s

 

 

To upload any code, I can verify it at first by clicking on the icon True , to make sure the code is correct before uploading it. I uploaded it by clicking on the icon right arrow

I can see now uploaded successfully. I noticed nothing but this notification. But now the arduino is ready to transfer the code to the board that I made a couple of weeks ago.

Now, I have to change the board as I’m going to program the board (Attiny44 microcontroller). I started by selecting the board that I installed from Tools>>boards>>Attiny 24/44/84

 

 

   Now I checked the rest settings, as I used Attiny44 and 20 MHz crystal. In this case and as I mentioned the Arduino acted as programmer, in other words it acts as ISP. So, I selected the programmer from Tools>>Programmer>> Arduino as ISP

 

 

Now, everything is ready in terms of the program preparation to start uploading the codes through the Arduino Uno board to the Attiny44 hello board. Looking back to the Attiny44 data sheet and to the board that I have made, the Resistor and LED connected to Attiny44 pin 6 but this pin is called 7 in terms of programming if I wish to call or communicate it as mentioned in the pin diagram.

So, I prepared the code to turn on the LED only, by defining the pin the the void setup and turning it on in the void loop

 

Note: The arduino programming language is C-based and I have two main loops, the first one called void setup (to identify any input/output pins and do initialization for some parts) the second one is called void loop (to do anything and it will run continuously repeating)

To upload the code, I clicked on the Sketch>>Upload using Programmer

 

 

I saw the notification  done uploading. And the LED has turning on.

 

I tried to make blinking by using delay function, as the following code

So, it’s mainly 4 commands the first one to turn the LED on, the second one is to wait for 10 ms, the third one is to turn the LED off, and the last one is to delay once again. These commands will be repeating all the time acting as blinking