7. Electronics design

In this week, I have designed and fabricated my electronics circuit using EAGLE software and SRM-20 Monofab Machine. This page will outline the process I followed:

Step1 : Learn it :

If you are new to the software, I recommend you watch the following videos as they were the videos I watched at first I downloaded EAGLE:

• For schematic design
• For routing your board circuit !

Step 2: Download it

In order to design the same circuit I have designed you will need two main libraries:

• Neal’s library
• Fab library

Step 3: list it

Once you are done watching the two video and downloaded your library list the component you are going to include in your design mine where the following: - Microcontroller ATtiny44A

• 2xresistors (10k)

• Resistors (based on the led)

• Led

• Phototransistor

• 20MHz resonator

• Button switch (6mm)

• Capacitor (1uf)

• 6pin header

• FTDI header

• Ground

• VCC

Step 4: Design it

Once you are done add the components to your schematic and connect them together for my circuit I connected them as the following:

Step 5: Route it

Design rules:

• Wire-pad 0.4mm
• pad-pad 0.4mm
• wire-wire 0.4mm

Step 6: Export it

Make sure you change the resolution with minimum 400dpi

to export the outer edge, I have hidden all the layers except the the dimension layer and I have drown the box by the routing then I export the design with the same procedure

Step 7: Calculate it

I have done this by Fab Module you can refer to week5

Step 8: Mill it

Step 9: Organize it

Step 10: Solder it

you can refer to week5

Step 11 : Program it

Downloads

• Zainab’s Echo Hello Board Files