8X8 LED DOT Matrix Module with MAX7219 ESP-MOD a 940 nm invisible Class1

a 940 nm invisible Class1 laser emitter

Its fairly simple to use

2 mm to 15 mm

With a cross section measuring only 10 × 12 mm (0

but requires careful timing to grab data

8X8 LED DOT Matrix Module with MAX7219 ESP-MOD a 940 nm invisible Class1Wiring instructions: The left side of the module for the entrance door, the right of an exit door when the control of a single module, is sufficient input port connected per CPU When a plurality of modules in cascade, input and output CPU termination, an input terminal of the second output end of the first module of a module, t It has the first two modules of the input terminal of the three termination modules, and so on. LED color: Red, Green, Blue