Motor cable extension plate for electric adjustable light crossing machine

Written before:
Since Lichuang can only buy 1oz copper thickness, the high current of the motor is not enough, so I drew a four-layer board. It should not be a problem to run 20A in a short time,
so you must choose a four-layer board when you buy it. ah!
The board has been put together. Do not break it off directly when you get it. Cut it with water-mouth pliers and then polish and trim it.
Note: The carbon board can conduct electricity. Please make sure it is well insulated from the carbon board when using it.
 
Dimensions: 29mm×8mm
LED: four strings, please buy 5730 Package, in the picture, a 3.3v, 150ma ice blue LED is used,
the resistor is particularly bright: in fact, the size of the resistor does not matter much. Just use a piece of tin for less than 3s, 22Ω for 4s, and 82Ω for 6s. If you use LEDs of other specifications, you can go to the following website to calculate
LED light-emitting diode current limiting resistance value calculator_Online Tool_Electronic Engineering Network (eechina.com)
 
Some final pictures