e-licktronic Forum

jvq

Diode check sounds good. One of my mistakes at the time was that I only measured in-circuit. I put the 2SA798's in sockets when I replaced them. I now have a Peak transistor checker but that's overkill for diagnosing if a transistor is fried. :) The EG circuit is not that big so you should be able t...

jvq

Yes that sounds right. One thing: I don't think that crash and ride share their accent in the Nava. That is the case in the original 909 but not here. You can verify this by checking for continuity on the accent inputs between crash and ride. There should not be continuity. How did you check the 2SA...

jvq

I had issues with my crash/ride because of bad 2SA798 transistors. Worth checking.

Search on this forum, you can hack a replacement from cheaper single transistors. Originals are ridiculously expensive.

jvq

I received my PCB's today. Thanks Vincent! I have a question about the BOM. It lists this part: https://nl.mouser.com/Search/ProductDetail.aspx?R=68602-404HLFvirtualkey64910000virtualkey649-68602-404HLF Mouser 649-68602-404HLF This is a 2x2 block of pins. But the header this is supposed to be solder...

jvq

It also looks like the new sample&hold circuits use much smaller capacitors (from 470nF to 470pF). I've noticed that the settling time of the previous circuit is quite long; I ended up adding sleep statements in the firmware of about 100us. More conjecture: It looks like the TL074 (used in the n...

jvq

This is very interesting. :) I've been trying to write my own Nava firmware for fun and the accents have proven challenging. Here is how I understand what these new boards are changing. First, some background on a difference between the 909 and the Nava. Each instrument has an accent input which is ...

jvq

Yes I only use MIDI one-way, to upload firmware. My workflow is: - compile new firmware - restart Yocto in bootloader mode (1-3-5) - send firmware - test by using the Yocto interface or by sending MIDI from the computer I don't need to switch MIDI cables while doing this because the computer that do...

jvq

I have noticed that size difference too and I don't know why it is. Might be because of a different -O optimization level on avr-gcc, I don't know what Arduino uses. How do you know the Yocto is ignoring the new firmware? I've had issues too where new firmware seemed to be accepted by the bootloader...

jvq

What I like about using MIDI to flash the firmware is that I don't have to open up the box. It's not the fastest thing, sure, but it works. I wrote a little script here that converts firmware from binary to the sysex format used by the Yocto/Nava bootloader. https://gitlab.com/jacobvosmaer/yocto-bui...

jvq

Neat!

I've been doing my debugging in a very crude way, by lighting up LED's. Using the serial port must be much nicer.

Search found 78 matches

Re: Cymbal decays

Re: Cymbal decays

Re: Cymbal decays

Re: Nava Last Update: Accent improvement

Re: Nava Last Update: Accent improvement

Re: Nava Last Update: Accent improvement

Re: is firmware public ?

Re: Yocto build script

Re: is firmware public ?

Re: Serial Communication from the Yocto