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Items tagged with: diyelectronics

I pulled apart an LED bulb. I can't remember the lumens but think it was 200lm. I want to use the individual LEDs with an Arduino but don't know what resistor to use with each as I'm not sure how big a punch each one packs. The resistor for all 36 tiny LEDs is in the second photo – looks like [brown black black black red] to my eyes.

Any idea how I can calculate the resistor needed for one bulb please?

#electronics #question #diyElectronics

A photograph of an array of tiny LED bulbs set in a circle. This is the inside of an LED lightbulb. There are 36 tiny circular bulbs on a circular breadboard being held by a hand. The board is around five centimetres in diameter.
The reverse of the circuit board from inside an LED lightbulb. There is a resistor (blue resistor with the following stripes: brown, black, black, black, red), a transistor and a couple of other modules that I don't recognise. It is being held by a hand.
#electronics #diyelectronics #question

In the #UK it's not always sunny enough for one of these to be useful, but I've hooked mine up to a #DIY #battery pack—made of #recycled #liions—and while it's basically useless on a cloudy or rainy day, it actually provides a meaningful amount of power on a sunny day.

This would never work as a commercial product because, if these components were all brand new, it wouldn't make any economic sense.

That's the beauty of #solarpunk #diyelectronics and #recycling! It brings a whole new life to these reclaimed panels and cells!

Shoulder bag with a solar panel cover most of the outside surface. A small LCD multimeter is visible connected to it.
An obviously DIY 3S3P li-ion battery with a BMS held to it by elastic bands.
#solarpunk #DIY #UK #recycling #diyelectronics #liions #recycled #battery

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