Can you tell more about the project ?
I doubt if this is reliable enough for your project. It seems to be just a quick project with minimal components.
Do you know if it is legal ?
The ESP32 has the advantage that the frequency for the coil will be the same.
For the circuit I would use a full or half H-bridge with 50% duty cycle.
I don't know why he uses 40% on and 60% off, perhaps it has to do with the circuit.
Adafruit sells a small version and a bigger version.
I think that X-Base started a Kickstarter in 2017: https://www.kickstarter.com/projects/1294229783/x-base-wireless-led-lighting-and-display-system