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Hi I want to light up 6 red colour LEDs from a 12V supply (vehicle battery).
Don't think about the input part of the transistor the pulse coming from a micro controller.
Can anybody tell me is my circuit looks ok?
Hi I want to light up 6 red colour LEDs from a 12V supply (vehicle battery).
Don't think about the input part of the transistor the pulse coming from a micro controller.
Can anybody tell me is my circuit looks ok?
Hi I planned to put two 47R resistors
Code:14v-6v=8v v=ir 8=20/100*R 40=R
hi Suraj,
Check that 40R calculation.
Rs = 8V/0.02 = 400R. !!
Morning Eric,
You beat me to it!
Torben
Ooooops sorry my mistake it should be 400R so its better place two 470R resistors.
Yes, 470Rs will give you a current of 17mA which will be enough to light up 20mA LEDs quite nicely and provide a little breathing room for the LEDs.
Torben
Nice to see you are caring.!
Disclaimer:
No LED's were harmed in anyway, while making this project.![]()