David,
After thoroughly reviewing the Bill of Materials, it did state the proper 555 timer (TLC555); a big oversight on my part. I'm assuming that the BOM has all of the correct components listed, I just needed to be a bit more careful. But to the uninitiated, this has been a good learning experience. ?Hope someone else can learn from my mistake. ?Thanks for your help and support.
Lee
---In direwolf_packet@..., <dranch@...> wrote :
Hello Lee,
?Thanks for your suggestions on the
direction to take to troubleshoot the problem.
Yeah.. troubleshooting over email is hard so I usually tend to start
simple and work your way up.
First, if I could change my pay check like I
inadvertently changed the resistor values that would be
good! ?I mistakenly used a 100k ohm instead of a 100 ohm
resistor in a couple of places (learn by mistakes).
?That fixed one issue. Secondly, the 555 timer I ordered
was not a CMOS timer thus the minimum power requirement
for the current timer is 4.5v where the RPi can only
supply 3.3. ?I've ordered up the correct timer and have
high hopes that this will completely fix the problems.
Oh.. those "substitutions" would do it!? Curious, where did you get
the wrong part values from?? We should work on getting those
materials clearer so others don't do the same thing.? I actually
have one of those boards here too and I even sourced all the parts
but I still need to build it.? :-)
--David
KI6ZHD
