how to bring down 240V to 5V for LED?
2006-07-15 10:26:53 · 4 answers · asked by ERIC LIN 1 in Education & Reference ➔ Homework Help
is there any other way other than using a transformer? i need something very small. will a resistor or diode work? i need 5V with less than 1W.
2006-07-15 10:34:43 · update #1
You'd need a resistor. The folks at Radio Shack (do they still sell that stuff?) should be able to help you.
2006-07-15 10:31:55 · answer #1 · answered by Fred 3 · 0⤊ 0⤋
Bu using a stepdown transformer with a turn ratio of 24:1, or if that is not feasible, use the proper resistence in series with the led.
2006-07-15 10:30:35 · answer #2 · answered by WC 7 · 0⤊ 0⤋
I think you can try diode. if I remember correctly diode can be used to control voltage. But there is a circuitry that you must connect before it can work. You have to check with those who deal with this
2006-07-15 20:12:15 · answer #3 · answered by Clown & Joker 5 · 0⤊ 0⤋
dunno
2006-07-15 10:28:28 · answer #4 · answered by Anonymous · 0⤊ 0⤋