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7. Electronics design

Assignment

group assignment

  • use the test equipment in your lab to observe the operation of a microcontroller circuit board

individual assignment redraw an echo hello-world board

  • add (at least) a button and LED (with current-limiting resistor)
  • check the design rules, make it, and test that it can communicate
  • extra credit: simulate its operation

Tools Used at 3DEXPERIENCE Lab at Dassault Systèmes

Machines

Software

Components

  • 6-pin programming header

  • microcontroller: attiny44A

  • FTDI header

  • 20MHz resonator

  • Resistor (value 10k)

  • Button

  • Ground

  • VCC

  • LED (Light Emitting Diode)

  • Resistor (value 499 ohms)

Tools

  • Weller WES51 Soldering Iron

  • Super Wick

  • Curved Tweezers

  • Soldering Tip Cleaner

  • Carpenter’s Tape

Other Materials

  • TBD

Group Assignment

use the test equipment in your lab to observe the operation of a microcontroller circuit board

I did not take photos, though I we used 2 different machines, and I do not rember the names of either of them.

Individual Assignment

redraw an echo hello-world board

  • add (at least) a button and LED (with current-limiting resistor)

  • check the design rules, make it, and test that it can communicate

  • extra credit: simulate its operation**

This week I needed more time, and did not complete this assignment, as the lab is closed during the weekend. Unfortunately, during the weekend I had a health scare though was generally recovered on Monday.

Completed

  • redrew an echo hello-world board and added a button and LED

  • ran a script to check it

Here are the resources I used to draw the trace and interior of the board.

The following are the steps I took to redraw an echo hello-world board.

Eagle Schem 01

Eagle Board 01

Eagle Schem 02

Eagle Board 02

  • additionally, I became comfortable with using the Roland SRM-20 solo, and recorded how to make a board.

The board I cut was the attiny45.

Seen here. attiny45

VPanel Progam

Here are the steps used to cut the board in mods:

  1. Create tool paths

  2. Open server program

  3. SRM-20 PCR png

  4. Delete socket

  5. Module

  6. File save

  7. Save local program (not working)

  8. Traces png

  9. Zero out to 2

  10. Set to .006

Challenges:

  • Laying the PVC board flat, as it was not milling easily.

Fix

Recalibrate and reset the orgin point to 0.

Next Steps

Thankfully, I can dedicated more time to Fab Academy this coming week. Here are my remaining items left to complete.

  • mill the board I designed

  • solder components and test that is can communicate

  • update website with notes before

Design Files


Last update: March 30, 2022