Spin Semiconductor

Thanks for the info, what do you think about the LM1117?

Interesting discussion. I've been using 85 c 1uf electrolytics in my design for the ref and mid caps. I haven't seen any issues with ADC or DAC conversion. This is OT, but I managed to get the chip's noise performance below -100dB unweighted. I won't say exactly how low, but I will say that I don't...

Aion wrote: ↑Tue May 26, 2020 2:16 pm @ smear "do they use the same larger values for REFP?"

Yes, 22 uF both for MID and REFP.

Any improvements using larger caps?

Great Frank, my assumptions were correct, the bottom plane is really solid so I'll stick to that.

In a dual layer pcb I allways use a bottom layer ground plane but think about adding a top layer ground plane. My question is, if an improvement or can lead to ground loops?

I tried SpinASM with Wine a few years back. As I recall it will not work directly with the USB port to program the FV-1 dev board. But you might be able to use a PICKit 2 clone and pk2cmd. Then just use the Spin IDE to generate a hex file for pk2cmd to use. Or also th CH340 eeprom programmers works...

Not really possible to cancel it as it is dependent on the signal so at one frequency it may have no tremolo effect but will at another frequency. And the signal is the thing we cannot control, the end user has all the control. You will have zero tremolo effect when you have exactly 2 full waves of...

I don't exactly know the answer but I do recall some SpinCAD simulations that helped me understand what was going on. The following thoughts are somewhat distant memories and should be validated against... "reality" (cough). When you're doing pitch shifting, you're cross fading the pitch ...

We all know that the pitch shifter algo has some tremolo-like artifacts due to the crossfading between samples. That tremolo rate is somewhat proportional to the pitch shifting frequency (slower at lower pitch and faster at higher pitch). I tried a lot of things to get rid of it or, at least, reduce...

Hey Bennett! This seems to be working but every time the signal starts boarding the threshold (i.e. just a little be below and back above again) I get a slight crackling sound in one of my output channels. Any thoughts on how to get rid of this? I think that when the signal is near the threshold yo...

You don't need to do an octave for each channel and then do the feedback loop externally. You can use both pitch shifter in series in the code and then add what you want...

Hi, I don't know if this is related to what happened to me, but I was getting horrible hiss from the first PCB I soldered. In my design FV-1 is on top, and THT components on bottom. GND planes of both sides are connected through as many vias i could insert there. The fact is that the main issue was...

Hi Sweettalk, I too am trying to lower the noise floor which is mainly too much hiss in my case which I have also noticed on many commercial pedals that I have tested as well, is this the same as yourself ? I use the 10uf pin 3 and pin 26, The main Spin FV-1 datasheet shows the use of 1uf but the d...

Hi!, I'm designing a new project with the FV, I've done a lot of pedals with it and always trying to lower the noise. Had some troubles with ground loops, and planes. The best results I got it using THT components, with the FV1 in the bottom of the board and the ground plane on the top, any thoughs ...

Yes, you have to emulate an eeprom with the arduino.