9V Supply (3 LEDs)

[AngelLaHash]

[url="http://www.ebay.co.uk/itm/100-pcs-5mm-RGB-LED-4000mcd-Common-Cathode-Free-R-/330651196533?_trksid=p5197.m1992&_trkparms=aid%3D111000%26algo%3DREC.CURRENT%26ao%3D1%26asc%3D14%26meid%3D6835666898575200839%26pid%3D100015%26prg%3D1006%26rk%3D1%26sd%3D330651196533%26"]http://www.ebay.co.uk/itm/100-pcs-5mm-RGB-LED-4000mcd-Common-Cathode-Free-R-/330651196533?_trksid=p5197.m1992&_trkparms=aid%3D111000%26algo%3DREC.CURRENT%26ao%3D1%26asc%3D14%26meid%3D6835666898575200839%26pid%3D100015%26prg%3D1006%26rk%3D1%26sd%3D330651196533%26[/url]

3 LEDs wrapped in one
Red/Green/Blue
My thinking was to use the Green (to say there is Mains) Blue (to show the battery is running) and Red (to show the Battery is Low)


Red
9v@20mA 350Ohms 2.0v Vf (just LED linked to a battery)
9v@20mA 330Ohms 2.4v Vf
56k/16k 9.0v/2.0v (Voltage drop)
33k/12k 9.0v/2.4v

Green/Blue
9v@20mA 280Ohms 3.4v Vf
9v@20mA 260Ohms 3.8v Vf
18K/11K 9.0v/3.4v
22k/16k 9.0v/3.8v [ if the voltage drops below 8.1v then it will drop the LED supply to 3.368v)

So the problem is going from 3.4/3.8v to feed the Blue light to change to Red that is coming form the same supply but
Would suit Most effect Pedals