System Integration

Individual　Assignments

• Design and document the system integration for your final project

Have you answered these questions?

• Created a dissemination plan for your final project
• Outlined future possibilities and described how to make them probabilities
• Uploaded a draft summary slide and video in the correct resolution and format
• Checked your slide and video are accessible from your website

PC working environment

• PC: MacBook Pro(16-inch,2019)
• OS: Sonoma 14.7.2
• Terminal: zsh

System diagram

• Sender side

• Receiver side

Brad

• try 1

• try 2(only Sender side)

The power supply was to be taken from the back of the microcontroller, but using it here would make it impossible to use 5V, so everything was reconnected to 3V.

• try 3(only Sender side)

It is not finished yet, but I reworked it again to make the wiring for the OLED Display and battery easier.

Sender side

• Schematic

• pcb

In this case, the power supply is taken from the back side of the microcontroller, so we drilled a hole for that purpose.

This time I tried reflow soldering! The hole I made was too small for the soldering iron to fit through, so I shaved the cut end at a slight angle.

Paste solder into this hole and melt it by applying an iron.

We experimented to see if it is possible to connect and charge the lithium-ion polymer actually used.

• datasheet XIAO ESP32S3

The data sheet described the following

• When XIAO ESP32S3 is not connected to the battery, the red light comes on when the Type-C cable is connected and goes off after 30 seconds.
• The red light flashes when the battery is connected and the Type-C cable is connected for charging.
• When connecting Type-C to charge the battery fully, the red light turns off.

The red light is blinking like this, which indicates successful charging!

Receiver side

• Schematic

• pcb

case

Sender side

We redesigned it several times. It was very difficult to not only make sure that all the parts would fit, but also to take into consideration how they would be assembled and when they would be installed.
In the end, we used acrylic, which is faster to process than a 3D printer, transparent, and desirable looking.

Initially, I designed it as a 3D-printed pillar-like object with inserts to be screwed down.
However, this is not very pleasing to the eye. So we decided to shorten it so that the side part can be removed, and then glue the rest with acrylic sundae.

The production process is as follows

• design (Fusion360)

I briefly assembled the acrylic to account for the overlap before designing it in Fusion360.

top panel

bottom panel

wall panel 1

wall panel 2

Variable resistor mounting　panel

Install LiPo battery　panel

mounting feet

Inserts were added to the finished product so that the song could be screwed down later.

• cutting

In this case, a laser processing machine was used.

• assembly

The parts other than the part to be the lid were glued using acryl sundae.

Design files

• Receiver side (Fusion360)
• Sender side (Fusion360)
• top panel (SVG)
• bottom panel (SVG)
• wall panel 1 (SVG)
• wall panel 2 (SVG)
• Variable resistor mounting　panel (SVG)
• Install LiPo battery　panel (SVG)
• mounting feet (STL)

impressions

• I found laser processing to be more productive than 3D printing, with faster processing times.