3v supply
Posted: Sun Jul 29, 2012 7:56 pmWhere could I extract 3v to power the on off switch illumination? I guess I need a resistor as well. Any ideas?
www.megadrum.info
MegaDrum Forums
http://miumiuonestop.megadrum.info/forums/
3v supply
http://miumiuonestop.megadrum.info/forums/viewtopic.php?f=3&t=2005
Page 1 of 1
Posted: Sun Jul 29, 2012 7:56 pmRe: 3v supply
Posted: Sun Jul 29, 2012 9:52 pmIs it a LED illuminated switch? You can use 5V via a current limiting resistor.
Re: 3v supply
Posted: Mon Jul 30, 2012 7:43 pmThanks Dmitri. What size would the resistor be?
Re: 3v supply
Posted: Mon Jul 30, 2012 9:02 pmDepends on the LED's specs.
R = (5V - LED's Forward Voltage) / (Desired LED's Forward Current)
Desired LED's Forward Current depends on the LED's specs and desired luminance intensity/power consumption.
See http://ledcalc.com/
R = (5V - LED's Forward Voltage) / (Desired LED's Forward Current)
Desired LED's Forward Current depends on the LED's specs and desired luminance intensity/power consumption.
See http://ledcalc.com/
Re: 3v supply
Posted: Mon Jul 30, 2012 9:37 pmThanks that looks useful.