I wanted to build another Zendrive clone. The Koan Drive used an OPA2604 opamp but I thought I’d try a AD712 (from eBay). There isn’t much difference, if any, in the sound. But still, I love the pedal so much I wanted a spare.
Also…I found another way to seal the artwork decal on a pedal.
He says further down – “…inkjet clear sticker film with an extra sheet stuck over the printing for protection.”
What was that Carpenters song?
“…and say goodbye to…Envirotex…”
Here you can see the edge of the decal, looks great.