Introduction: Fidget Spinner RPM Meter
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About: I would like to share with you some of my electronic designs where various components are involved such as arduinos, microchips, esp32s, op-amps, displays, sensors, DIY stuffs, LEDs, memories, bluetooths and s…
When the fidget spinners rushed into the world obviously my kids wanted them as well.
It didn't take much time to throw the question to myself, "what is the max speed I can make with them"?
Supplies
The main ingredients:
-PIC16F882 microchip
-Infra sensor
-HC-05 Bluetooth module
-Android app with MIT app inventor
Step 1: How It Works
The infra LED makes invisible light, when the fidget spinner's arm goes above it, it reflects the light back to the infra detector.
The microcontroller detects this and count the time between the arms.
Via Bluetooth the chip sends the data to the mobile phone and the app shows that on the screen.
Because fidget spinners have different amount of arms, I gave option in the app to select the number of the arms for the most precise result.
Step 2: Schematic
Step 3: PCB Layout
Step 4: MIT App Structure
Step 5: Ready Project
