Projects with Charles Morris
<UL>
<LI><b>punch driver Rev A</b> is Charles' punch driver use with the PC8E.
<LI><b>simple-loop*</b> is a simple passive EIA to current loop converter for
terminals with active loops.</LI>
<LI><b>simple-loop-active</b> is an EIA to current loop converter for terminals
with active or passive loops and either active or passive reader run.</LI>
<LI><b>simple-loop-active[1-5]</b> is an EIA to current loop converter for
terminals with active or passive loops (i.e., earlier versions).</LI>
<LI><b>Loopsup</b> is an inexpensive (but inefficient) set of loop supplies to
drive active loops (if the DC-DC converters are not available).</LI>
<LI><b>simple-loop-activevrs</b> is simple-loop-active, with an improved design
for the jumper blocks.</LI>
<LI><b>simple-loop-screws</b> is simple-loop-activevrs with screw terminals
for use inside the TTY, instead of the more dangerous DB-9.</LI>
<LI><b>simple-loop-screwsfixed</b> is simple-loop-screws with the pinout
of the PS2501 and the EIA connector fixed.</LI>
<LI><b>simple-loop-vrs</b> is simple-loop-screws, with the overlap of the
DB-25 and the mounting hole fixed.  This is very close to what Charles
ordered the prototype from (he flipped some diodes around).</LI>
<LI><b>simple-loop-v2</b> is simple-loop-vrs, with bugs fixed from the
prototype, and the diodes flipped to match the prototype.</LI>
<LI><b>simple-loop-v3</b> is simple-loop-v2, with the pinout of the PS2501 
and the EIA connector fixed.</LI>