SHROOM From Super Mario
Introduction: SHROOM From Super Mario
Hey what's up guys, this is the SHROOM PCB Badge that is themed after SHROOM from Super Mario.
This wearable Badge is made completely from PCB I got from PCBWAY and is powered by an Attiny85 which is in the SOIC8 Package.
I added three WS2812B LEDs to this badge which are visible from the front side of the board.
These LEDs are placed in an inverted position so their glow will be visible from the front side through the soldermask opening I left in both layers.
This Instructables is gonna be about how I made this project so without further ado let's get started!
Supplies
Following were the componenets I used in this build-
* custom PCB
* Attiny85
* WS2812B LEDs
* 1uf 0805 CAP
* Brooch pin
* SMD Coin Cell holder
* CR2032 cell
* Attiny programming setup (Arduino nano)
* SOIC8 Clip
Step 1: About This Project
My goal here was to make something related to <PERSON>, recently I've been making all sorts of PCBs themed after animes or comic characters but I never made anything related to <PERSON> so I decided to make a shroom badge with LEDs so I could wear it or add it to my backpack.
<PERSON> themed badge is currently in development.
Step 2: Technical Details
This badge is powered by an Attiny85 which is a low-power Microchip 8-bit AVR® RISC-based microcontroller that combines 8 KB ISP Flash memory, 512B EEPROM, 512B SRAM, six general-purpose I/O lines.
It's a powerful little MCU that can be implemented in any of the basic Arduino projects to shrink the whole setup.
Do check out its datasheet for more details- https://www.microchip.com/en-us/product/ATtiny85
To power the whole setup, I used a CR2032 Coin cell that delivers 3V to the system.
Then there are three WS2812B LEDs that each draw 50mA so 150mA in total which would give us a backup of 1 Hour + as CR2032 has a capacity of 210mAh.
Datasheet for WS2812B LEDs
https://cdn-shop.adafruit.com/datasheets/WS2812B.pdf
Step 3: Shroom Character
As for the custom PCB that is themed after Shroom, I had to first get an image which has to be imported into my PCB Cad software.
I choose the above black and white image and imported it as a PCB layer.
Step 4: PCB Design
PCB that I made for this project is a simple board, let me explain why.
Schematic
In the schematic, I placed an Attiny85 that does all the work of controlling three WS2812B LEDs that are connected in Din Dout Config.
Dout of 1st pixel goes to Din of 2nd pixel, Dout of 2nd pixel goes to Din of 3rd pixel, we supply a signal to Din of the first pixel to control all three of them.
Each LED has its 1uf capacitor and then there's a switch that is connected to D4 of the Attiny85.
This whole setup is then powered by a coin cell holder that we up the coin cell into.
After finalizing the schematic, I converted it into a board file and started the editing process.
Step 5: PCB Board
I first imported the Shroom image and use it as a PCB Outline and a few of its details were used to make a silkscreen layer.
All the components that I'm using are SMD ones so I placed them at the backside, I placed LEDs in the circle area.
Why? because I added a soldermask opening in the circle area and now the glow of leds would be visible from the TOP side.
Also, I'm using an inverted custom footprint that I made for these WS2812B LEDs.
We have to solder LEDs upside down instead of soldering them normally.
Step 6: PCBWAY
After Checking the board for one last time, I sent the Gerber data to PCBWAY for samples.
I received the PCBs in a week which was fast.
I choose RED Soldermask for this project with a white silkscreen.
I've Left openings in the soldermask on both sides, the idea here was that the LEDs which are on the bottom side would be visible from the topside.
The quality of the PCB I received was just awesome.
I have Been using their service for a while and I have to say, it's pretty decent for getting started.
Checkout PCBWAY from here- https://www. 982