LED Cluster


Getting started on Arduino development. I wanted to find out if it is possible to control the below LED cluster through an arduino and if so, how would I do it? If it helps, I'll be running my development from a car's 12v (and stepping down for the arduino).



The red is OK, the green would require a boost circuit to bring the auto voltage over the 16V required. I would look for another option; there is a mighty large selection of red and green car bulbs to choose from.

See http://www.bristolwatch.com/ele/transistor_drivers.htm for how to hook it up. For the cluster above you would need two transistors (one for the red and one for the green; the +V would be connected to the white wire).

That cluster has no current limiting resistors or anything else. I would recommend driving it with a constant current regulator. There are plenty of chips to do this at a fixed 20mA.