Hi, Dman777 wrote: > 4) I don't understand why, the heat concentration is in the dead center of > the clock, but the source of what I think is the source of the heat...the > 7805 voltage regulator... is of to the side of the source of the heat > concentration area.
The 7805 only powers the electronics, which I expect draws very little current, so the regulator will remain cool. I think the heat source might be the MOSFET in the switching power supply for the nixie voltage. Unfortunately it's the rather common, but not very good MC34063-based design, you can see the schematic in the kit instructions here: <http://www.pvelectronics.co.uk/kits/LTC1040/LTC1040_v5.pdf>. They use an IRFD220 MOSFET which has way too high R_DS,on for this application IMHO. If you don't want to replace the MOSFET (which wouldn't look too good as I don't think you will find a better replacement with the same footprint), having a fan blow air onto it might indeed be a good idea if you can stand the noise. Best Regards, Arne -- 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 neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/54354E29.4030209%40blinkenarea.org. For more options, visit https://groups.google.com/d/optout.
