Asked
— Edited
How should I wire up the leds on my rad? can I PLUG THEM IN RIGHT ONTO THe board? or can I wire them together? how have other people did it?
How should I wire up the leds on my rad? can I PLUG THEM IN RIGHT ONTO THe board? or can I wire them together? how have other people did it?
The headlights either side I tried quickly direct to the EZ-B but nothing happened. It could have been my wiring though but I suspect it was the signal wire not providing enough power. A TIP122 circuit may work but I don't know if 5V is a safe voltage or not.
Edit - if you want to connect the positive to signal and neg to ground that's fine. The only downside is each led takes up a port. The short leg on a led is the neg, long is positive.
https://www.youtube.com/watch?v=XzhVm3WWyy0&feature=youtube_gdata_player
Alternately you could build a new circuit for the head using an I2C extender and control everything individually through the I2CWrite commands, using up 0 digital ports.
and again, could I wire up 2 leds together on the same servo extension? yes or no. I calculated it out, and I could run the leds separately on individual ports. tight squeeze though. don't have enough servo extensions is why I wanted to fit 2 leds on one.
$10 seems pretty high for a TIP120/TIP122 and a resistor though.
Without stripboard;
Solder the resistor directly to the base of the transistor
Solder the white signal wire to the other side of the resistor
Solder the black ground wire directly to the emitter
Solder the red wire to the anodes of the LEDs
Solder a black wire between the cathodes of the LEDs and the collector
Use heat shrink to keep it nice and neat and free from shorts.