Recently I began a project to produce the MLDL discussed in the PPC Journal. I have had some success and some failure with the Phase Counter portion of the PPC MLDL. I have narrowed it down to 4 wires that cause problems. Whenever I connect the SYNC to the Phase Counter at the CD4013 pin #5(data), this locks the calculator up. Also, whenever any of the three ground wires are connected to the same IC, CD4013, pins 4,8 and 10 this causes the calculator to phase out, display fades away and then the calc locks up. Any thoughts to this. I have connected everything else up and it seems ok. Also, if you look at page # 35 in this documentation and see the BAT, V+ and GND connections on the cable connector. Then look at page #28 They show the V+, VCC switched from the cable connector. As long as this is how they are connected it is ok but I thought that the V+ and VCC might be mixed. Any thoughts from the HP Community?
PPC MLDL Project
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