Hello Group! I received http://de.mouser.com/ProductDetail/Vishay-Dale/PD007D07001S51/?qs=sGAEpiMZZMvkC18yXH9iIurp2WUOVpc7D8%2fd1LKTOnY%3d some days ago, wondering how to drive it. Thankfully I discovered http://www.tubeclockdb.com/forum/Builders-Forum/86-Cherry-alphanumeric-display.html which drives a compatible display. The annotated PCB: http://www.tubeclockdb.com/Alphanumeric_clock1.pdf Now I'm in the process of doing the PCB layout and getting my BOM together. Since I'm more into software normally, I have some questions: 1. How do I get the values of the resistors in the upper part of the PCB (e.g. R214, R198 and the one between them)? What power should they be rated for? The circuits seem to resemble drivers like the one in http://www.clock-it.net/neon/bally/6-Digit_Display_Driver_(AS-2518-21).pdf with currents from http://www.babcockinc.com/babcock/documents/doc_471.html 2. Isn't it neccessary to drive the "SCANNING KEEP ALIVES 1-16" pin (#1)? 3. It seems I only can get either 100 V or 120 V Zeners. What would you recommend?
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