A DIY stroboscope is a bright idea!

Stroboscopes produce carefully timed pulses of light in order to make a rotating object appear still. While this may seem like something of an exotic concept, YouTuber Mr. Innovative decided to build his own using an Arduino Nano.
His project uses a PN2222A transistor to drive a 10W LED, which acts as the device’s light source. The spinning RPM is set via a potentiometer, and a small OLED provides user feedback.

As shown in the video below, the stroboscope is able to cause a sign spinning around on a fan to appear nearly stationary. If you’d like to create you own, Arduino code is available here.
September 19th, 2018 at 01:49:42
How do I get the schematic?
September 23rd, 2018 at 22:16:16
Schematic without the advert links and maybe one that works would be great.
Some of your YT links are a bit off.
April 4th, 2019 at 07:41:11
Collector and emitter are switched in the schematic presented in the video.
August 5th, 2020 at 15:27:52
kindly give me the schematic of this valuable project. thank you
August 9th, 2020 at 09:55:18
error: expected unqualified-id before numeric constant
1141,,j ,
November 16th, 2020 at 12:35:07
iam getting the following error message while compiling”
error: expected unqualified-id before numeric constant
1141,,j ,e kindly give the solution thank you