Supply chain management is apparently not my forte. Especially when I run out of stock while on vacation. In any case, though, we have more kits in stock.
Two improvements have been made for this round of kits:
1) The RC filter on the PWM outputs has been replaced by an LC filter for both triangle and square waves. As a result, the ripple in the output is much reduced. The silk screening on the PCBs hasn’t been updated, but it’s a drop-in replacement.
2) Spring terminals instead of screw terminals. Screw terminals are great if you’re using 18 gauge wire or bigger, but how often do I use that? Almost never. Spring terminals are the rule from now on.