Would a tip 120 be sufficient? If i setup an array of 24 leds using this calculator http://led.linear1.org/led.wiz Using these specs Power supply 24v Forward Voltage 3.2 Diode Current 20mA Amount 24 It gives me a reading of each 270 ohm resistor dissipates 108 mW the wizard thinks 1/4W resistors are fine for your application Help together, all resistors dissipate 432 mW together, the diodes dissipate 1536 mW total power dissipated by the array is 1968 mW the array draws current of 80 mA from the source Now do i get a transistor that can handle the 80mA from the source or Dissipated power of 1968 mW?

Just looking to drive all by one pwm pin. Ill take a look at what was recommended

Writing this from my phone. This will be for a small aquarium light fixture controlled by a netduino plus for day and night mode and watch ph and temp. Am looking at controlling maybe 25 white with 1 pwm pkn and 15 blue with another. If anyonecan help me it would be much appreciated. Thank you

Is this possible and if so how many on each pwm pin? Leds will be from spark fun super bright white and blue 10mm. Any info would be great thanks

When trying to reflash ANY thing (4.1 or 4.2) i am getting this error (error: Signature check failed for file ER_CONFIG.sig Anyone know why?!?!? Just got my n+ a week ago, have been having to reset it frequently because it is locking up when programming. Now it seems like its completely gone.... Please advise.