say have 10 leds in series have forward voltage of 2v each , power supply 5v,
would leds light dim? still need resistor?
if wanted them lit @ full blast use capacitor?
would leds light dim? still need resistor?
if wanted them lit @ full blast use capacitor?
short answer: it won't work!
ten 2v leds in series requires 20v, plus allowance voltage drop across resistor. i'd recommend @ least 30v 10v across resistor. can use 1 resistor series leds.
technically, nothing bad happen without resistor. but, "bad practice". always use resistor or other current limiting method, leds.
go ahead , try it! proper current limiting resistor, nothing bad can happen. add 1 led @ time see happens! the leds might show-up very-very dimly, you'd have in dark room see. i'm guessing won't visible light @ all, in dark room.
a capacitor not boost voltage.
p.s.
if connect leds in parallel, each led needs it's own resistor. and current sum, if driving them arduino i/o pin don't exceed 40ma total.
ten 2v leds in series requires 20v, plus allowance voltage drop across resistor. i'd recommend @ least 30v 10v across resistor. can use 1 resistor series leds.
technically, nothing bad happen without resistor. but, "bad practice". always use resistor or other current limiting method, leds.
go ahead , try it! proper current limiting resistor, nothing bad can happen. add 1 led @ time see happens! the leds might show-up very-very dimly, you'd have in dark room see. i'm guessing won't visible light @ all, in dark room.
a capacitor not boost voltage.
p.s.
if connect leds in parallel, each led needs it's own resistor. and current sum, if driving them arduino i/o pin don't exceed 40ma total.
Arduino Forum > Using Arduino > Project Guidance > Noob...many LEDs in series with 5 volts
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