DiY LED Macro Light

[Graham_of_Rainham]

[Jim Ford]

Re: DiY LED Macro Light

Interesting - can you provide a link to the supplier, please.

Jim

[Benedict]

Re: DiY LED Macro Light

NEWS FLASH : Heath Robinson is alive and well and living in Rainham

[Graham_of_Rainham]

Re: DiY LED Macro Light

Interesting - can you provide a link to the supplier, please.

Jim

http://www.ebay.co.uk/itm/160840392638?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649

Looks like the price has gone up a few pence

[al_kaholik]

Re: DiY LED Macro Light

Graham, don't forget that SMD LEDs can be successfully dimmed using a variable resistor. Getting a cheap pot from maplin or similar (guitar volume/tone knob from ebay? - that way you can crank it up to 11) would give some cheap flexibility.

That is unless your PSU is variable, I can't tell from the photo

[Jim Ford]

Re: DiY LED Macro Light

Graham, don't forget that SMD LEDs can be successfully dimmed using a variable resistor. Getting a cheap pot from maplin or similar (guitar volume/tone knob from ebay? - that way you can crank it up to 11) would give some cheap flexibility.

That is unless your PSU is variable, I can't tell from the photo

With lots of LEDs in parallel, I would think you could easily exceed the rating of a carbon track pot. You'd really need to use a wire-wound one.

Jim

[Graham_of_Rainham]

Re: DiY LED Macro Light

My PSU is a fully variable 0-15V

At 12V the 6 panels draw 300mA

For fully portable use, I'd probably go with a pack of 6 rechargeable AAs and simply "tap" the Voltage I wanted, Or I may get one of my old 555s out of the "come in handy" box and knock up a PWM supply or see if there is a chip on eBay.

All good clean fun...

PS

Don't know why I bother making things...

http://www.ebay.co.uk/itm/DC-DC-Buck-Converter-Adjustable-Step-Down-Module-LM2596-Power-Supply-1-5v-35v-/290756830239?pt=UK_BOI_Electrical_Test_Measurement_Equipment_ET&hash=item43b275241f#ht_4352wt_1398