4. Electronics production¶

nueval¶

nueval
- Login with fablabs.io
- Student’s checklist -> Send Message to Instructor(in English) -> Local evaluation
- Progress -> Completed (Assignment done)
- (Local eval) Completed x 2 -> Request to Global Evaluation
- Global Evaluator will be assigned -> Global Evaluation starts
- (Global eval) Completed all + Final Presentation -> Graduate!

Preparation for next week¶

3D Scanning and Printing
group assignment:
- test the design rules for your 3D printer(s)

individual assignment:
- design and 3D print an object (small, few cm3, limited by printer time)
that could not be made subtractively
- 3D scan an object (and optionally print it)

FAQ Define cannot be easily made subtractively¶

Answer: Your model has undercuts), overhangs, nested parts, meshes etc.

Ref. assesment

Preparation¶

idea or model for 3D printing
idea or find object for 3D scan

Group Assignment¶

characterize the design rules for your in-house PCB production process
extra credit: send a PCB out to a board house

Group assignment:¶

Assessment

Characterize the design rules for your in-house PCB production process:
document feeds, speeds, plunge rate, depth of cut (traces and outline) and tooling.

Feed Rate
- the distance which the cutting tool during one spindle revolution [ipm]or[mpm]
- Ref. Difference Between Feed Rate and Cutting Speed in CNC Machining

Note

In Mods’ path to G-code module, cut speed (mm/s) is used to calculate F(Feed rate) in G-code.

Example:
Mods path to G-code module
- cut speed 1(mm/s)
G-code .nc
- F60.0000(mm/min)

characterize the design rules
- Material
  - FR1
    - Flame Retardant
    - About FR1
  - Size: 100 x150 x1.6mm
  - Cu layer: 35um = 0.035mm
- endmill
  - shank diameter
    - 1/8” = 3.17 mm
  - traces
    - 1/64” = 0.396748 mm
      - 2FL
    - V-bit 0.2mm 30deg (alternative)
  - outline
    - 1/32” = 0.79375 mm
      - 2FL
    - 0.7 mm (alternative)
CAM and Machine

CAM	Gcode sender	Machine	PC
Fabmodules	(included)	Roland MODELA MDX-15	Linux in lab
Mods	(included)	Roland MODELA MDX-15	Linux in lab
Mods	gSender	Sainsmart Genmitsu PROVerXL	Your PC

http://fabmodules.org/ -> 404
Mods

ToDo¶

Set up milling environment
- Tips: Genmitsu PROVerXL 4030
mill
- trace width traces, interior

Individual Assignment¶

make an in-circuit programmer that includes a microcontroller:
extra credit: customize the design
mill and stuff the PCB
test it to verify that it works
extra credit: try other PCB processes

MCU¶

Family	MCU	Interface	in-circuit programmer (Assignment)
original AVR	ATtiny44 ATmega328P	ISP	Fab ISP
AVR	AVR-1 3216	UPDI	USB-Serial board & Serial-UPDI board
ARM	SAMD11C	JTAG/SWD	FreeDAP board
Xtensa	ESP8266 ESP32	Serial	USB-Serial board

Attention

FA2022 Trend
SAMD11C -> USB-Serial board
To Programm SAMD11C, need another DAP programmer board
(Not FTDI chip)

AVR-1¶

in-circuit programmer	Adapter board	Target Board
USB-FT230XS-UPDI		hello.t3216
USB-FT230XS-serial	serial-UPDI
hello.D11C.serial.5V.1.1	serial-UPDI.3

ARM¶

in-circuit programmer	Adapter board	Target Board
hello.CMSIS-DAP.10.D11C
hello.CMSIS-DAP.4.D11C	hello.SWD.10-4 hello.SWD.10-4.1	hello.D11C.echo.1

Xtensa¶

in-circuit programmer	Adapter board	Target Board
USB-FT230XS-serial hello.D11C.serial.5V.1.1		hello.ESP32-WROOM

Commercial¶

DAP¶

ICE	DAP board
Atmel-ICE	MAX32625PICO

Raspberry Pi & Seeeduino Xiao¶

Ref. FA2022 Embedded Programming Environment

Raspberry Pi4	Seeduino Xiao

USB-Serial¶

Digikey	SwitchScience	Akizuki
TTL-232R-5V	FTDI USE serial Rev.2	FT234X module

Note

Mkdocs tips

Open Link target in new page
[text](path/to/link){:target="_blank"}

Image Size (width)
![](path/to/image.jpg){width=300}

Click image to other link
[![](path/to/image.jpg)](path/to/link)

Todo¶

Mill in-circuit programmer and Adapter board for AVR-1

in-circuit programmer (This week)	Adapter board (This week)	Target Board (week06/Pre-session)
hello.D11C.serial.5V.1.1	serial-UPDI.3	hello.t3216

Solder components
Set up programming environment
- Raspberry Pi4
  - Install Ubuntu
  - Wifi Setting (lab’s and your_house’s)
  - SSH
    - no displey
    - no keyboard and mouse
  - install edbg
- Seeeduino Xiao
  - Arduino IDE
    - Board manager
    - DAPLink sketch
Burn Bootloader
- your PC —(WiFi, SSH)—> Pi4—(USB)—> Xiao—(jumper wiers)—> hello.D11C.serial.5V.1.1_board
Program 3216 board
- your PC —(USB)—> D11C.serial—>UPDI_Adapter—>3216_board
- Arduino IDE
  - Board manager
  - Example Sketch (Blink)

Last update: February 21, 2022