4) PCB fabrication workshop

Using the PCB pictures from this reference to create process file .rml

Used Files

Files Link
Traces Download
Outline Download

4.1) PCB Design and preparing

Using the Fabmodules to convert image to G-code for the milling process.
Steps:

**Traces**

**Outline**

4.2) PCB fabrication

Used machine: monoFab
Used software: VPanel
Process: Milling
Mill bit used: 1/64 for traces; 1/32 for outline

**Workplace**

**Setup - Leveling**

**Milled PCB traces**

**Attach and Replace Mill bit**

4.3) PCB Assembly

**Components**

1x ATtiny45 or ATtiny85
2x 1kΩ resistors
2x 499Ω resistors
2x 49Ω resistors
2x 3.3v zener diodes
1x red LED
1x green LED
1x 100nF capacitor
1x 2x3 pin header

**Soldering area**

I start soldering the parts to the PCB, using the schematic and the board image below as a reference for component values and placement. Start with the most difficult parts (the ATtiny45) first, so I can have the most access. I stuggled with soldering at first. But with Eng. Hashem help I did install the microcontroller in it's place successfully.

**PCB board**

Update 21/01/2022:

I've completed the soldering for all components. Also, I did the short-circuit test using the milimeter to check that all components are working.
short-circuit test:

Ribbon wire:

Update 06/02/2022

Programming:

I used these references first; second in order to install the required software, before programming my USBtiny.

Steps:


1) Open terminal and past the following command to install Homebrew:
ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
2) Install avr-gcc toolchain
brew tap osx-cross/avr
brew install avr-libc
brew install avro-c
brew install gcc
brew install binutils
brew install avrdude
Last step is checking avr-gcc version; by typing the following command:
avr-gcc –version
3) firmware
Using terminal to navigate the fts_firmware_bdm_v1 folder, and run make In order to create this file (fts_firmware.hex) 4) Using USBTiny to program my PCB: