Flux Capacitor PCB Badge V3
Introduction: Flux Capacitor PCB Badge V3
Hey Everyone what's up!
So this is my FLUX CAPACITOR Badge version 3 which is a replica of the actual flux cap which was in back to the future movie.
I've prepared its V1 a few months ago, back then, it had a couple of Throughole componenets which included the main MCU and Slide Switch, so I switched to all SMD components to make this project easy to assemble.
Like its previous version, this edition requires 2.6V at 0.0069A which is around 0.017 Watts or 0.000000000017 Gigawatts
It uses a CR2032 3V Coin Cell to power or we can use any TYPE C cable connected to a smartphone charger.
In these Instructables, I'm gonna show you guys how I prepared this Badge by following a few easy steps.
Let's get started
Supplies
Material Required
these are the things used in this built-
* Custom PCB (which was provided by PCBWay)
* LEDs 06038205S Mosfet IC
* SMD Tactile Button
* 10K Resistance 0603
* M7 Diode
* Attiny13A SOIC8
* USB Type C port
* 1K Resistance 0603
* Lithium CR2032 Cell SMD Holder
* Solder paste
* Arduino as ISP Programmer setup (consist of Arduino Nano or UNO)
Step 1: Circuit Study
Above is the Circuit diagram of V3.
Let me explain how this setup works.
In total there are 12 LEDs divided into Four different parts. Each part contains 3 LEDs connected in parallel, these 3 LEDs are then connected with 8205S N channel Moseft IC. Total 4 of these Mosfet ICs are being used to drive 4 different LED parts. An Attiny13A is being used to drive the gate of 4 Mosfets. 982
I've also added a Push Button on Pin D4 of Attiny to control the state of Mosfets. A Type C Port has also been added to power this setup through any Smartphone Charger.
To recreate the Flux Capacitor Animation, I've placed LEDs in a twisted way.
The First 3 LEDs that are connected in parallel are placed in the innermost part. then the second 3 LEDs are placed a little bit above the innermost part. The other two layers are placed in a similar fashion.
By Turning the Mosfet ON in a sequence starting from inside to outside, we get a chasing pattern similar to Flux Capacitor.
Also, you can get this Flux CAP from here -
https://www.tindie.com/products/makerpals/flux-cap...
Step 2: Getting PCBs From PCBWAY
After Finalizing the PCB, I sent the Gerber data to PCBWAY for samples.
I choose White Soldermask for this project with a Black silkscreen.
I've added graphics on Both sides of PCB to increase the aesthetic of PCB, 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.pcbway.com/
Step 3: PCB ASSEMBLY
These are the steps for the main assembly of the FLUX CAP V3 PCB.
* Solder paste Dispensing Process
* Pick & Place Process
* Hotplate Reflow
Because this PCB Doesn't have any Through-hole component, we dont have to add any component with soldering iron, except for the Coin Cell holder on the backside.
Step 4: SOLDER PASTE
The first step is to add solder paste to each components pad one by one.
To Apply solder paste, I'm using a Solderpaste Dispensing Needle with a Wide syringe, and the solder paste I'm using is a regular solder paste consisting of 63% Tin 37% Lead.
Step 5: PICK & PLACE PROCESS
After carefully applying Solderpaste we move on to the next step which is to add componenets to their assigned location.
I used an ESD Tweezer to place each component in its place.
Step 6: HOTPLATE REFLOW
After the "Pick & Place Process", I carefully lifted the whole circuit board and place it on my DIY SMT Hotplate.
I made this Hotplate especially for making projects like these which require SMD soldering. hotplate available in the market were not exactly cheap so I made a minimal version of that which you can check out from here-
https://www.instructables.com/DIY-SMT-Hotplate-Pro... 472