In an effort to build a low-current nixie clock, I tried using all 74HC parts. That works great, but there are still the (6) 7441, or 74141 TTL drivers.
How about this idea? When the clock is running on the backup battery with no line power, what if 5 volts Vcc were to be removed from the 7441/74141 drivers? That way, the clock itself would keep time, and the current draw on the battery would be kept as low as possible since only the CMOS ics would be running. Question: If the ground is kept on the 7441/74141 ics and the Vcc lead is disconnected, will that cause any problems for the 74HC160 counters that have their bcd outputs feeding the 7441/74141 bcd inputs? In other words, I am concerned about the possibility of the 7441/74141 having some path that would try to draw excessive current from the inputs when Vcc is disconnected. Is this a good idea to try, or is it a recipe for trashing some HC160 counters? Thanks. Chuck $4.95/mo. National Dialup, Anti-Spam, Anti-Virus, 5mb personal web space. 5x faster dialup for only $9.95/mo. No contracts, No fees, No Kidding! See http://www.All2Easy.net for more details! -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
