Individual cathode current limiters work great... Stole the idea from Greg's B7971 design. Note the transistors and current set resistors lining the display in the photo below. First light today on this Sperry SP-151 Panaplex.
In this case, I'm using individual cathode limiting due to widely differing amounts of current needed by the various segments for uniform intensity... not to mention the impact of varying numbers of segments for different displayed values using basic anode limiting. Note the uniform glow? :-) These are running a test with a single one and 31 zeros circulating at high rate around the 32 element shift register that drives the transistor bases. <https://lh3.googleusercontent.com/-Dh51zahJIy8/WgfzmkqaqXI/AAAAAAAAArs/orBtNPTYZfsHZdeg6Fdz6dELhE9sJxTjACLcBGAs/s1600/First%2BLight.JPG> Will use the same design with a Telefunken ZM 1350 display that's also in the works. Same issues and concerns a the B7971. Best regards, Bob -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/33e234cc-8a01-4c03-9102-50f2c13efb91%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
