650nm Laser Diode

This is a 5 mW laser diode module that emits a small intense focused beam of visible red light. The module can be used with an Arduino and photoresistor module to perform basic remote signaling. It is breadboard friendly and low-cost having a wavelength of 650 nm and an operating voltage of 5 V.
The laser head is composed of a light-emitting tube, condenser lens, and adjustable copper sleeve and it is assembled when delivered, the focal length of the lens is adjusted and glued by a strong glue stick, which can work directly after connecting to a 5 V dc power supply.

Working

The laser diode module works with Arduino together which contains Signal, GND and the middle pin indicates +5 V. The connection between Laser Diode Module and Arduino Uno where signal, GND, +5 V of Laser diode is connected to pin 8, GND, and 5 V respectively.
Then, download the source code attached here and open it via Arduino software. Choose the correct board and port before uploading the code into the board. Upload the source code into Arduino Uno.