A look inside a small USB lamp that is designed to look like a light bulb.
It's not super-bright so I was expecting it to be just one or two ordinary wide angle LEDs inside running at about 15mA each. But the current showed as about 150mA!
Internal examination revealed a large half-watt surface mount LED and a matching 13 ohm resistor. The circuit board material is common cheap material with most of the copper kept on the front to help dissipate the heat from the LED and resistor.
The seemingly low light output is mainly down to the hugely thick plastic diffuser that does certainly result in very even illumination of the front, but attenuates a lot of the light in the process.
It's not super-bright so I was expecting it to be just one or two ordinary wide angle LEDs inside running at about 15mA each. But the current showed as about 150mA!
Internal examination revealed a large half-watt surface mount LED and a matching 13 ohm resistor. The circuit board material is common cheap material with most of the copper kept on the front to help dissipate the heat from the LED and resistor.
The seemingly low light output is mainly down to the hugely thick plastic diffuser that does certainly result in very even illumination of the front, but attenuates a lot of the light in the process.
Can i get a online purchase link for this?
Do you know how much brightness does it produce?(lumens)
Btw i like to watch your video,you do the teardown so that i don't need to and can see what's inside of it