Turntable Record Player Speed Strobe LED

Speed Strobe for adjusting Turntables at 33 und 45 1/min.

Way cheaper as the bucks, the HiFi Industry want to see from you.
(Let's say if you bought expensively, about 10 to 12 euros (compared to 50 to 100 euros in "Jeff's warehouse" or around 30EUR at other sellers))

In this version 50Hz, so, you need to print or buy a strobe disc for 50 Hz or if you own one for 60 Hz, feel free to change the Arduino Code.

A nice printable one, the one of the short video, is:
www.thingiverse.com/thing:4603199


(In the gif, it looks like an inconstant light, thats only because the frequency sometimes dismatch the single picture frequency. In reality it looks like a nearly constant light (in 50Hz))


Screws:
You`ll need 4x M3x8 or x10mm screws and 2x M2x 6 to x8mm screws, one M4x25mm screw and a M4 nut.

Battery / Akku:
9V block

LED:
Green one (better to see than other colors)
with resistor
(I have had only the 10 to 20V version at home, you should use a version for aro