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August 01, 2014, 07:53:21 AM
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DIYstompboxes.com  |  DIY Stompboxes  |  Building your own stompbox  |  LED Luminosty 0 Members and 1 Guest are viewing this topic. « previous next »
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Author Topic: LED Luminosty  (Read 569 times)
markbee
Posts: 57


LED Luminosty
« on: January 03, 2012, 03:16:11 AM »

How big luminosity would you recommend for LED diode for stompboxes? Ive made a stompbox with some random LED and it almost makes me blind Cheesy I dont know what the luminosity is so I dont know which one shall i buy now. I was going for something like EHX kind of light, that one seems okay.
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LucifersTrip
Posts: 2549


^^ Fuzz Skull ^^


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Re: LED Luminosty
« Reply #1 on: January 03, 2012, 03:51:17 AM »

How big luminosity would you recommend for LED diode for stompboxes? Ive made a stompbox with some random LED and it almost makes me blind Cheesy I dont know what the luminosity is so I dont know which one shall i buy now. I was going for something like EHX kind of light, that one seems okay.

just turn the pot till you like it, then solder in a resistor. start at 10k (or use a 20k), and don't turn down to 0 or you'll blow the led.


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always think outside the box
Mark Hammer
Posts: 21889


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Re: LED Luminosty
« Reply #2 on: January 03, 2012, 10:14:34 AM »

I made myself a little unit with a socket for the LED pins, a 9v battery clip, and a 12-position rotary switch to select between a bunch of standard resistor values from 1k up to 18k.  To find the optimum standard-value current-limiting resistance for an otherwise unmarked LED sitting in your parts bin, just set the switch to 18k, plunk the LED in the socket, and turn until you get the desired luminance.  It will let you zero in on something workable for anything from 300mcd up to 3000mcd types.  A dozen positions is not enough to cover all bases, but you'll know that if 4k7 is too dark and 3k3 brighter than you really need, you can use 3k6 or 3k9.  It's not more precise than using what Luciferstrip suggests, but the resistance values are pre-identified so you don't have to drag the meter out to measure.
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