things
New Member
hi all, i have bought 25 IR led's, and wired them 13 on one row and 12 on the other row. the led's in the rows are wired in parallel, and the rows are wired in series. i am trying to run them off a usb port, but the led's get kind of warm directly connected to the usb port, but every resistor i try gets hot, or the led's are really dim?? anyone have any suggestions on what resistor to use?
thanks!!
thanks!!