A refreshingly short and simple video i recently received a package from china and they had thrown in a little extra gift in the form of this usb lightning thumb and i'll. Take a look at that later on and it turns out it's just a little half watt white light this one's cold, but they also do them in warm and they also do them in pink purple, uh, green red and other colors, i think, and blue um. But this thing is rated about half a watt, it's very, very simple: it's a nice diffused light and in a room, this acts as a perfect night light. It's the sort of thing that, if you were camping, this is a light which is extremely cheap.

I shall provide a search link to it on ebay, so there's no price gouging, but it would be really handy for camping or use as a night light or in the event of armageddon happening in what politics are like these days uh. It would be a very useful little light for use with a usb power bank charged from solar panels inside and i've already taken. A picture of the inside is equally simple. Let me just focus down onto this and zoom in.

We have where's my pan here. We have two fairly decent sized leds and we've got two 30 ohm resistors three: zero, zero, three zero and a multiplier of zero, which means it's just 30 ohms. The circuit board is held in place by the usb connector. As far as i can see, it looks as though they've literally pushed the usb connector through placed the circuit board on soldered the pins and that's what locks in place very simple construction.

There's a resistor per led with a negative on this side, going to the end of one led and also to the resistor. That then goes to the other led and the opposite is mirrored. It's got the positive going to that led and this resistor, so they basically just got that 30 ohm resistor and series of each led. The current draw is 120 milliamps, which is roughly 60 milliamps per led, which does equate fairly accurately to 3 volts across the leds, and about 2 volts dropped across the resistors, and that is about it.

It's a super simple design. It's ultra functional. There is the possibility, if you wanted, to have the power consumption to either change the resistors or just cut one of them out and just kill one of the leds effectively, although it might go a bit lopsided, but this is a nice simple design. It's unexpected.

I was expecting it just to be an ordinary led light and, to be honest, it is an ordinary led light. Uh usb powered led light, but it's actually super compact and functional. It's a win. It's a very nice little light.