LED Light for X2 Mill (Project Completed)

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Stilldrillin:
Joe,

Very nicely done, and shown..... :clap:

Like many projects electronic/ electrical, I was watching quietly, in awe! :bow:

I have had a vague idea to use one of those patio parasol/ table ring lights......

Thank you! :thumbup:

David D

andyf:
Nice job, Joe. I've been watching too, and mean to sort out something similar myself.

I recently bought (from B&Q at under a fiver each, for those in the UK) a couple of these:

which give a good bright light. I'm thinking of cannibalising the 24 leds out of one, then following in your footsteps. Unless a suitably sized bit of PCB comes to light (no pun intended) I may just use a couple of rings of bare copper wire, one for the led anodes and another for the cathodes. The lamps run on 3 AAA cells, giving 4.5V. That drops to around 3.6V when switched on, so I'll need to hunt through my ever-growing collection of discarded wall warts for something in that region which can push out around half an amp.

Andy

Stilldrillin:
I`ve got one of those lamps Andy!

A very handy light. It`s magnet sticks it under the gearbox, behind the mill spindle. :thumbup:

BUT! The magnet attracts steel swarf....

David D

75Plus:
Andy and others, the LED's in the battery powered lights are wired in parallel due to the supply voltage being low. Any number of LED's can be paralleled and supplied with a wide range of voltages by using a suitable limiting resistor. Here is a resistor calculator that figures it all out for you.

http://ledz.com/?p=zz.led.resistor.calculator

The picture I posted as "the mill light only" was from the original umbrella light that was too large. Here is one from the new light. Sorry for the error.

Joe

andyf:

--- Quote from: 75Plus on May 21, 2010, 09:47:30 AM ---Andy and others, the LED's in the battery powered lights are wired in parallel due to the supply voltage being low. Any number of LED's can be paralleled and supplied with a wide range of voltages by using a suitable limiting resistor. Here is a resistor calculator that figures it all out for you.

http://ledz.com/?p=zz.led.resistor.calculator

--- End quote ---

Thanks for the link, Joe. My bucket of old wall warts hasn't yielded anything with volts in single figures and capable of >500mA, but there's a 15V, 750mA one. So I'll complicate an otherwise simple task by wiring chains of 4 leds in series, to give 6 chains, then wire the chains in parallel and select a resistor on test (otherwise known as trial and error), starting high and working down to lower resistances until I get enough, but not too much, light.
Or I could fiddle about with Ohm's Law. I think I can remember it: An ohm is an 'ouse where a volt lives :)

Andy

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