I've been using Protel and Orcad for several years and am generally happy with both. We currently use Protel DXP, which I like better than Protel 99SE. I'm able to easily create netlist using Orcad and import it into Protel. The DXP version also is able to save documents as AutoCAD rev 14...
The shorts range in value from 60 ohms to >200k. The boards are not coated and have components on one side only, no adhesive.
The failures occur after subjecting the boards to 90F, 90% RH for 24 hrs. The boards are ramped from abient to 90, 90 in 30 minutes to avoid condensation.
In all...
I have recently gotten some field returns that have high impendence shorts under some of the .1uf 1206 caps. The assemblies pass our end of line test but fail in the field under high humidity. I suspect contamination left over from the assembly process is the reason for failure, but need to...
Can anybody suggest a good LED reference? I am specifically concerned about degradation of the LED over time. What would a curve of luminous vs time look like? I expect to run the LED's at about 12-15mA.
Thanks
scoreb
