What are the characteristics of straw hat lamp beads?

What are the characteristics of straw hat lamp beads?

Red Light Beads

The angle of straw hat lamp beads is 90-120 degrees, with uniform color and high brightness. The current is generally 0.02A, the power is 0.06W, the voltage of straw hat red light bead, straw hat infrared light bead, straw hat yellow light bead, straw hat orange light bead is about 1.8-2.4V, and the voltage of straw hat blue light bead, green light bead, white light bead, and purple light bead is about 2.8-3.8V.

It adopts a mesh constant current circuit design, with strong anti-static function to ensure the stability of the module.

Anti-static PVC profile base is adopted to effectively prevent short circuit caused by contact between PCB solder joint and metal word shell.

I type, Y type and X type connecting wires are adopted, and the module installation is convenient and fast; With self-locking connector, the connection is more free.

Low power consumption, pure color; Long service life and high stability. The connection is convenient. Each module contains plugs and socket cables for convenient connection. Light weight, compact structure and convenient installation. Available in various sizes, suitable for any size font. Low voltage power supply, safe and reliable.

Straw hat lamp beads are widely used in toys

At present, it is not suitable for lamps (lighting needs more power, and the straw hat series is obviously not competent)

There is no need for grayscale performance, and the power is generally low. Even if 74HC595 is used with non-constant current, it will not cause damage to the straw cap lamp beads.

How much resistance does it take to connect the 5v usb power supply to the straw hat lamp bead?

According to the different power of straw hat lamp beads, the resistance value of string resistance is different. Try at 470 to 1K. Note that each string resistor is connected together again.

The straw hat lamp bead used is relatively powerful. If the original flashlight is 3V and the normal working voltage of the straw hat lamp bead is 2V, the current limiting resistance voltage drop is about 1V and the current is about 1/22=45mA. When connected to 5V voltage, the current remains unchanged, and the current limiting resistance should be 3/0.045=67 Ω, so it is estimated that 70 Ω should be OK.