[MRCA] Progrock 2 What IF board

B. Smith smithab11 at comcast.net
Mon Oct 14 22:07:53 EDT 2024


Attach photo of my Progrock2 "What IF" board. The Edge connector was cut 
from a larger 32 pin connector. Dip switches are used for "Bank" 
selection and allow the board to output on  8  frequencies.  The output 
Photo Jack can be moved to any of the three CLK outputs. Power is a 9V 
battery.
Blank PC soldering pads allow for playing   "What IF".  My next "What 
IF" board will have an additional dip switch for CLK output selection 
and increase the board output capability to 24 programmed frequencies.  
TIP: The outputs (CLK) are not buffered  -  you have to add a capacitor 
in series. If the board looks a little ruff and like it was assembled 
late on a Saturday night in 45 minutes - you might be right.
Z






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