Spin Semiconductor

Hmmm, 2 bad parts is strange. Post a schematic of the board. The one in my original post is that, if I leave most parts unpopulated as I did with my second try on this batch of boards. With the decoupling caps next to their pins, of course. The only thing omitted is the power supply. Linear 3.3v re...

Will do, thanks. It's a bit frustrating when you debug and aren't any closer to knowing where the error lies. Still don't know if my board is wrong or if by some bad luck got two bad chips. Or both! Guess I'll find out with the new board in a few weeks, simplest board possible, and some new chips fr...

Well, I would try a new FV-1. A few will fail quickly after being put in circuit, called infant mortality. I'm out of FV-1's anyway, so yeah I need to order a couple more. The ones I just got are dated 2011, don't know how they were stored, etc. Can they hypothetically be ordered in small (2-4) qua...

Hi, your MID-cap is quite large, while your REFP-cap is rather small... REFP-resistor is smaller than in the datasheet, too. Dunno if that matters, but... The MID cap is the same as the one on my devboard, as is the REFP cap. And since the devboard works fine, I don't see how they would be a proble...

Designed this stamp this morning

I'll wait a day or so to make sure there aren't any mistakes, then I'll order.




Wondering if I should order new FV-1's from elsewhere.

Hi, thanks for the reply! I tried a few things this morning: - Increased crystal cap to 22pf to see. No change. - Tried internal programs by pulling T0 to ground instead. No change. - The EEPROM works. It's the same socketed chip I use on the devboard. I've been swapping it back to the devboard from...

Hi all, After prototyping an effect using the FV-1 devboard, I had designed a PCB layout based off of it, confident that as long as I stick to the rules, it'll work. My PCBs have come in. Populated the first one, but the FV-1 seemed dead. Checked voltages, tested continuity, caps, everything, and wh...