Under some circumstances (a known firmware is running on the device, the device is in a resting state) you can tell via total device current consumption whether the LEDs are on or not. It might not work for your device depending on how it uses current, but depending on your device and how you test it, it might work well. Vision QA systems are in wide use in the automotive industry, however they could not be characterized as cheap. If you really are looking for a sub $5,000 off the shelf system that will manage to do what you need done, you're going to have a hard time finding it. But if you do, I know many people would would love to hear about it! A google search of "machine vision" yields a lot of companies that provide such systems. -Adam On Mon, Aug 1, 2011 at 11:16 PM, Vitaliy wrote: > We have a device with four LEDs, and we'd like to make sure the LEDs work= .. > Visual inspection at the factory, proved to be unreliable. Does anyone ha= ve > experience with reasonably priced machine vision systems that can be > configured to perform this sort of test? > > All we want to know, is whether the LEDs turn on and off. Making sure > they're the right color is a bonus. > > Vitaliy > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .