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These are kinda cute.  Basically super-miniaturised meteor lights based on a microcontroller and flip-chip LEDs under phosphor (or clear gel for the blue ones.)

https://www.youtube.com/watch?v=35I6QV_Une0

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Mini meteor lights - with schematic

These are a super-minimalist version of the classic meteor shower Christmas lights. They are very simple and operate from about 3V, meaning you could use these on a costume, or make strings of them. If running from 5V a series resistor is required. I tested one next to another running at 3V and the resistor value that matched the 3V intensity was 150 ohm. You can use a higher value resistor if you want a more subtle effect or a longer run time on a power bank. 1000 ohms still gives a useful intensity. The listing I got these from on Aliexpress is:- https://www.aliexpress.us/item/3256805191562686.html They should work out around $1 each. Make sure you get polarity correct, as powering microcontrollers with the wrong polarity can damage them. A series resistor will assist in limiting damage from a polarity incident. If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:- https://www.bigclive.com/coffee.htm This also keeps the channel independent of YouTube's algorithm quirks, allowing it to be a bit more dangerous and naughty. #ElectronicsCreators

Comments

Anonymous

New led to market too Clive called a FireFly. Internal capacitor flashing circuit, 1.5 seconds ramp up 1.5 seconds full power 1.5 seconds ramp down. Pretty cool

bigclive

It sounds like the elusive breathing LEDs. Have you any idea where they're available?

Keith W

Some are advertised as having 5 modes. https://www.aliexpress.us/item/1005006358067461.html

bigclive

I hadn't seen those. The little capacitor must be to keep the memory between power cycles.