Hagiwo Sync LFO still WIP?

[awonak]

Greetings,

I was wondering what steps remain keeping the Hagiwo Sync LFO in WIP status? I used the gerbers to order smd populated PCBs & Panels from JLCPCB and everything seems to work for me. I'm able to run all 3 of the of the firmware's listed in this repo. Thanks for sharing these files, this was my first time ordering populated PCBs. I'm shocked how cheap it was!

Cheers,
Adam

[mzuelch]

Yes it is, isn't it ;)
My inner monk was a little bit unhappy about its performance and I had planned at the time to improve the firmware.
Over the last months my module was built several times and I never received any complaints about the usability and function - so I think I should kick it to "Working". I actually never bothered mainly because I've focussed on my 2HP Utilities.

[awonak]

If you have any specific observations about firmware performance, consider adding issues for them. I'd be happy to help take on an issue as an open source contribution way of saying thanks for sharing the hardware files.

My one hardware gripe is that the arduino nano should be rotated 180 degrees so the usb cable doesn't bump into the module power cable.

I'm also exploring the possibility of creating a new firmware inspired by the Generative Sequencer firmware for the Sync LFO hardware build. Imagine P1 -> probability of new voltages , P2 -> number of steps, P3 -> voltage amplitude, P4 -> ? (maybe quantized scales or slew rate?). Each cv input would advance the step and possibly generate a new voltage value based on the probability. The bi-polar outputs would add even more sequencing & modulation patching opportunities!

Building off that idea, since the module layout is symmetrical, I think it would be really neat to have reversible panel designs (similar to Zlob's artistic/soulless panels) with the knob labels for each of the firmware.

Thanks again for sharing all of the files and organizing the firmware in this repo.

Also, Knopsl says Hi from the EuroPi Discord!

[modulove]

Okay, I'm pretty happy with how this firmware turned out!

Very nice! I will give this a try.

[awonak]

oh hey! I noticed a space for new coming soon firmware on the download page. Mind if I submit a pull request with my firmware? Or do you have something else in mind?

[earsneyes]

hah you got me there :). I love the Firmware but couldnt give it a testdrive besides from loading the fw. Please go ahead!

[earsneyes]

Was thinking to try it on a cv sequencer module i have here. But work came in the way.
I have somthing ready for a new board and it runs Hagiwos cv Sequencer Firmware fine. It features an OLED (SPI), Rotary Encoder and two additional CV inputs and i added a few things to the fw. Great fun and inspiration these modules and the work @mzuelch has done is amazing for starters like me!

[earsneyes]

Okay, I'm pretty happy with how this firmware turned out!

I gave it a spin yesterday and i must say, I love it!
It worked very nice for making rings melodic ands it works as well for a 303 bassline.
Will look into this deeper when time permits :)

[modulove]

@mzuelch i suggest to change the position of C11/C8 and D3/D4 so there is space for a shrouded IDC Header.

Done: Should i go ahead and try a pull request ?

[modulove]

@mzuelch I suggest to protect the outputs with a diode as well.
Is it possible to add a bicolor LED for the bipolar outputs ?

[mzuelch]

A bicolor LED should be doable - all it needs is an opamp, a resistor and the LED itself. But I will have to redesign the lower part of the PCB quite extensively. Just have a look into the schematics of Abakus or Haraldwerk's LFO.
For output protection, a 1206 1k resistor always does the trick. When misusing an output as input, this R limits the current into the last opamp output and prevents the opamp from blowing up.
I would rather prefer to downsize the input protection. The diode network is a little bit too much - I've just copied HAGIWOs design to learn if it's better than my usual design. It isn't.