Simple laser flashlight circuit diagram

The picture below is a circuit diagram of a laser flashlight. The circuit is very simple. It only requires a battery, a resistor, and a transistor.

Laser flashlights are cheap, high-quality, and extremely cost-effective. Their main features are excellent light-gathering performance and a shooting range of 1200m~1500m. When observed with the naked eye, the light spot is still very small hundreds of meters away, so it is widely used in teaching, tour guides, and entertainment. After testing, it can be used for long-distance protection and warning and remote control data transmission. As shown in the figure is the schematic diagram of the laser flashlight. The devices are all chip components, so the size is very small. However, because the laser power is high, it cannot be pointed directly at the human eye.