Hey guys. Here's an update. It is working out amazingly. The edrumin is absolutely magic! It's really a very simple build and I just took a chance using what I thought seemed logical and turns out that the edrumin just does perfectly with.
All four piezos are are wired in parallel as are the three rim piezos on the bottom. The three edge cones are wired in regular polarity, copper to sleeve and ceramic to tip. The center is wired Roland way with reverse polarity; ceramic to sleeve and brass to tip. I set the module to center trigger and Roland wiring and it just works. The PS is very accurate and precise with a little fiddling with the PS gauge.
There is absolutely no hot spot. The HSS worked well before but of course it wasnt perfect. Now it's not even needed, I mean doesn't even register. Completely enev triggering across the head and no l, I mean no hot spotting. Did I say it doesn't hot spot?
I'm using the Roland 2 ply power ply head. I like the feel of the real feel more but the accuracy and precision of PS with the Roland is much better. Until Rob optimizes the algorithm for the Reel Feel (hint, hint Rob) it's the Roland.
Also it has perfect speration between rim, head and rimshot where as before the rimshot was never as reliable. Before when I'd shank the rimshot I'd get a weird edge articulation trigger. Now I just get the rim which isore accurate to real life. Also, before a direct center hit would always lad the white line on the rimshot range right on the green border which would sometimes result in a false rimshot. Now, none of that.
I also used to have to use a 87% voltage divider to tame the trigger. Now that is not necessary at all. I have the gain at just below 5 for perfect triggering. Can't say enough good stuff.
I used a laser cutter at work to cut the 1/4in wood. If you'd like the CAD file I made I'll share it but it is for a 10 lug drum.
Hope you find some of this helpful or inspiring. Happy edrumin.
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