A
alokw
- Jan 1, 1970
- 0
Hi all,
I have a quick question that should be simple to answer.
I have 54 LEDs that require 3.4 V DC with a maximum of 30 mA that need
to be wired together.
I have 9V batteries to power them.
I did the calculations and ended up wiring them in series of 2 LEDS
with an 82 ohm resistor for each pair and hooked up the end to a
single 9V battery. With the 27 pairs, it was suppsed to draw 810 mA.
When I switched it on, everything was dim. I didn't think about how
many mA the battery could provide.
My alternative idea is to wire 2 9V batteries together and wire 55
LEDs in series of 5 LEDs with a 39 ohm resistor with each series. This
*should* draw 330 mA. Right?
I think this will work, but want to verify it with you people that
know what you're doing before I buy more 9V batteries and new
resistors. I just want all the LEDs to be as bright as possible.
Thanks for your help!
I have a quick question that should be simple to answer.
I have 54 LEDs that require 3.4 V DC with a maximum of 30 mA that need
to be wired together.
I have 9V batteries to power them.
I did the calculations and ended up wiring them in series of 2 LEDS
with an 82 ohm resistor for each pair and hooked up the end to a
single 9V battery. With the 27 pairs, it was suppsed to draw 810 mA.
When I switched it on, everything was dim. I didn't think about how
many mA the battery could provide.
My alternative idea is to wire 2 9V batteries together and wire 55
LEDs in series of 5 LEDs with a 39 ohm resistor with each series. This
*should* draw 330 mA. Right?
I think this will work, but want to verify it with you people that
know what you're doing before I buy more 9V batteries and new
resistors. I just want all the LEDs to be as bright as possible.
Thanks for your help!