Fab Academy

Miguel Lourenco
 


 
 
 

  
 
 
Electronics Design
 

Adding a LED and a Button to the original circuit (Hello world) using EAGLE software.

The circuit uses an Attiny44 with external clock of 20 MHZ (oscillator)

The button links the Vcc, with serial resistor (10 K), to pin 10 (PA2 Attiny). When button closes the circuit, pin 10 connects to GND.

 

The Anode of the LED connects with pin 6 (PA7 Attiny) through 499 R ( limiting LED current). The LED cathode connects with GND.

 

The schematic was performed with Eagle Light. Begin to install components libraries and after added the button and resistor, added the LED and resistor and made "wire" connections.

 

This is the final Board (in Eagle), after some adjustments and calculations.

 
After Eagle, went to Linux and Fab modules, make PNG rml (resolution: 500) and send it to MDX-20 for cutting.
 

 

 

 
 

Eagle Schematic

 

Eagle Board

Fab Modules to Roland MDX20

 

PCB

 

Hello circuit with button and LED ( uses cristal with two capacitors)

 

Hello circuit with button and LED (20 MHz resonator)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

We decided to use a cristal with two capacitors to

substitute the oscilator, and then, assembled all the

componentes.

Finally, we are ready to program the ATtiny44.

 

 

Recently make another one with 20 MHz oscilator.