On 8/20/2011 16:59, p4trykx wrote:
Hello
As the 1-wire counter is discontinued I tried to make my own counter
from ds2408 and 8-bit counter with bit output 74hc590.
It all stared when my energy supplier changed the energy meter to
electronic one with blinking led. It pulses 1200 times per kWh.
I read those pulses with phototransistor and amplify it with NPN
transistor (74hc590 counts when input changes form low to high).
Then I attach the output from 74hc590 to ds2408 and I get the value of
the counter by reading sensed.BYTE.
It works almost well but sometimes I get double counts. I' rather an
amateur so I don't exactly know what's wrong.
I suspect that I need to add some capacitor to smooth the change form
low to high.
Could someone with better knowledge than me look at the schematics and
suggest a solution?
According to the counter.png, the emitter and collector of Q1 are both
tied to ground.
I am not certain how this will work wired as such.
/m
------------------------------------------------------------------------------
Get a FREE DOWNLOAD! and learn more about uberSVN rich system,
user administration capabilities and model configuration. Take
the hassle out of deploying and managing Subversion and the
tools developers use with it. http://p.sf.net/sfu/wandisco-d2d-2
_______________________________________________
Owfs-developers mailing list
Owfs-developers@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/owfs-developers
