Exploring a Chinese magnetic "machine light" (with schematic)

While attempting to tidy up the gadget-mountain, I found this light that I bought via eBay a while ago. The listing hinted that it was a magnetic light for use on machines. It is. Specifically sewing machines, but it does have other uses where you need a splash of light.

By Chinese standards it's actually quite well made and functional. The circuitry is good and the LEDs are an interesting type being run at a sensible level that will ensure a long life.

This seems to be designed for Chinese factories, so I think it's only available in 220V. But it will still light on 120V. If using on 120V then you could increase the value of the red capacitor to about 1uF or 1.5uF with a rating of 250V for better intensity.

The light is very hackable. You could change the LEDs to a colour of your choice, or even design a completely new LED PCB for either the existing power supply or a custom 12V version.

The eBay keywords to find this are :-
magnetic led machine lamp
Target cost around £7, €8, $10.

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