Wow! Grahame you have once again done it!
I'm still working on my CRT clock. Maybe I'll get to this one one day too.
Quite the accomplishment.
On Monday, October 6, 2014 10:09:38 AM UTC-4, Sgitheach wrote:
Hi
I have been working on a new trigger tube clock that uses the Z700U
trigger
Hi Dave
I wondered how you were getting on. The trigger clock was a diversion
from scope clocks for a while and now I'm back working on my next scope
clock. 32 bit AVR at 66MHz, digital synthesis of the sine and cosine
waves (so no fiddly set up), 4kV CRT PSU so will drive most 5 CRTs
My guess is the heat is coming from the 7805 - they tend to generate heat
with even modest current draw. I believe a simple linear voltage regulator
is around 40% efficient - the rest goes to heat. The circuit uses 2 74141
type IC's, they draw a lot of current. If it was a problem (too much
On Thursday, 9 October 2014 14:37:26 UTC+1, M.J.Sangster wrote:
My guess is the heat is coming from the 7805 - they tend to generate heat
with even modest current draw. I believe a simple linear voltage regulator
is around 40% efficient - the rest goes to heat. The circuit uses 2 74141
It would be interesting to see which component is generating the heat.
Dman777?
On Tuesday, October 7, 2014 8:18:59 PM UTC-5, Dman777 wrote:
I have a 6 digit Nixie ZM5660 clock that I got from pvelectronics that is
beautiful and super cool. Everything is perfect about it. However, since it
I'm with the other guys. There may be nothing wrong with the unit, and its
operating normally. Saying warm or hot, with no real numbers really doesn't
mean anything. If you have access to a thermometer with a small pointy
probe, then get us some numbers. F or C, doesn't matter, just as long as
