UV deep ultraviolet LED 18650 battery holder version

Safety warning, please do not look directly at the UV lamp at work, it will cause damage to your eyes! ! !

Safety warning, please do not look directly at the UV lamp at work, it will cause damage to your eyes! ! !

Safety warning, please do not look directly at the UV lamp at work, it will cause damage to your eyes! ! !

Let me complain in advance [dog head saves life]

• The cost is a bit higher than 100 million
• The efficiency is too low
• It’s better to use quartz UV lamp

Some remarks

• For explanations of principles such as constant current dimming, please refer to the notes on the schematic diagram.
• The maximum brightness current exceeds 1A, please pay attention to the battery’s discharge rate.
• 3D printing shell in production
• Lamp beads are very expensive. I bought them for free.
• If you don't want to use UV LED, you can replace it with other ordinary lamps for lighting. Just modify the current sampling resistor of the constant current circuit.
• No need to add supports to the shell
• V1.31 Correct the resistance value of the constant current drive circuit 

Hardware description

• Extremely advanced typec interface
• Dual-band UVLED, UVA&UVC
• Constant current drive and dimmable
• Use a potentiometer to simultaneously control dimming, switch constant current chip, and fan
• Onboard 18650 battery holder, integrated charge and discharge overcurrent protection, using 4056 chip for charging
• Standby current 0.308ma, working power 0.68W-4W

shortcoming

• Because there is no aluminum base plate, the heat dissipation is relatively poor. The heat generated at the highest brightness may be too high to dissipate, but there is a fan interface.

Material link

• UV lamp 10-15mw (expensive)
• 18650 battery holder
• Fan-Jianzhun 2.54 interface external 25CM long maglev   (the latest and most useful fan)
• Φ2mm*6 self-tapping screws
• Φ3mm*14 self-tapping screws

Comparison of the sterilization principles of UV-A and UV-C

UV-A oxidation changes properties

●Photosensitive molecules such as riboflavin and porphyrin in bacterial cells can absorb specific light energy in UV-A

●Bacterial cells are oxidized to form active molecules such as OH-, O2-, O2, etc.

●The cell wall of bacterial cells is damaged and thus killed

UV-C directly damages DNA

●DNA in bacterial nucleic acid is exposed to UV-C light

●Bacterial DNA bases are broken and the DNA structure is destroyed

●Bacterial cells are killed and cannot reproduce