On 2012 Mar 11, at 9:07 PM, Gergely L?rincz wrote:
- check the Examine mode.
The idea is each push of the INPUT switch should result in a
presentation
of the memory contents.
Assuming the memory contents is somewhat random at this point, the
display should present random values.
That's one of the problems. Even if I push the input button, *Q*
output of
the the flipflop (4013) doesn't change. Seems like the 4013
doesn't work
properly.
How about the input conditions for the 4013?
D/9 = 5V
C/11 = 5V, goes to 0V with push of INPUT switch
R/10 = 0V (pulses to 5V for uSecs via 1802 after release of INPUT
switch)
Keeping in mind the output (nQ) of the 4013 will only change (go to
0V) for a few microseconds.