Hi Adam Thanks - yes 6 of the Russian chips. I m reassured! On May 8, 7:50 pm, Adam Jacobs <[email protected]> wrote: > You don't specify, but if you are using 74141's, then I would say that > is very normal. I believe that each 74141 uses 25ma of current.. So, > 150ma just in the driver IC's. Worse, if you're using a linear regulator > to get that 150ma @ 5v, then you are turning the rest of your > wall-wart's voltage into heat. If it is a 9v wall-wart, then 150ma @ 4v > is now heat. If it is a 12v wall-wart, then 150ma @ 7v is heat.. etc. > Anyways, long story short.. Yes, those numbers sound about normal to me. > You can do the calculations very easily to work it out for yourself, though. > > -Adam > > On 5/8/2012 11:45 AM, seaforth23 wrote: > > > > > > > > > Hi, > > It is a while since I built a Nixie clock. Just finished one using > > Moses chip, Tayloredge hv psu, and 6 IN-16 tubes, 2 blue led's. > > Standard 7805 regulator, fed from 9v. Curent is almost 600ma when > > running. Regulator gets pretty hot (though ok with heatsink). Nothing > > else gets warm and clock seems to run OK. Does this seem normal? > > Would appreciate your thoughts. Thanks, David
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