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About gerald.wert

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    MIDIbox Addict

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  • Gender Male
  • Location Pitttsboro NC USA
  1. Older pics programmer and book on programming

    No 18f4685 in there. There are 3 18f448 in there but I am not sure if they are workable. I am not super good at that level of things. Do you have a recommendation on the shipping? I tried usps and fedex and the best rate I could find was $66 that seems way too high.
  2. I started in on this a while back. I have a post I started somewhere. The boards are built but I have not built the CV board yet to hook it up and test it out. The recommended caps are slightly different for the new chips. I think I have the details and schematics in my post. If I can find the time I would like to finish it up and test the caps and r values.
  3.   Not sure if anyone here would be interested in this stuff before I put it up on Ebay. I have an old warp 13 pic programmer, several pic chips and PIC'n Techniques a good starter book to pic programming. $20 plus shipping. I think there is about $50 worth of pic chips there. They are all older models but are all brand new. I just do not use it and am clearing out stuff. The programmer works with older versions of MPLab. You will need a computer with a serial port to use the programmer or a good usb to serial converter. All fits in a flat rate USPS box.
  4. new to midibox, sourcing parts from mouser help

    You might want to think about buying parts from reichelt. The shipping is terrible if you are in the US but the component prices are so much better. If you are putting in a big enough order you will still save a good bit. They also stock better options on audio grade caps. Styroflex and Wilma. If you do go this route I would recommend getting a few extra of really common parts to have on hand as well. Mouser and digikey are nice to order from but you will pay a lot more per component but the shipping is fast and cheap. Worth the comparison especially if you are looking to build something bigger like the 6582.
  5. n00b question before etching

    Here is the info you need to build the swin sid. There is a typo in the pdf the processor is an Atmegs 8515. Be sure not to get the "a" version of the TDA 1543 it will not work. The red lines are solid links. I thought the 1U caps on the audio output are a bit high and will cause some roll off of the low frequencies but have not changed them and it sounds pretty good as it is. There are some other swin sid designs around but they are surface mount and not as easy to build. This is all through hole parts. I would socket everything so you do not have to worry about over heating any of the chips. If you have the time you could put in sockets for the output caps and experiment with caps to see if it makes a difference. I had a thread with some possible recommended values from the TDA data sheet and I was also asking about how to connect the 1725 series dac. It is a surface mount but is supposed to sound much better. There are extra lines to connect and was not sure where they should go... If you want to try other component values the TDA 1543 data sheet recommends a 3.3nf and a 1.2kr as the filter circuit on the output. This will bring the cutoff much lower and should improve the bass response. Maybe it sounds off or boomy or something though I can not think of another reason for the swin design to be rolling off so high. pcm1725[1].pdf tda1543[1].pdf SwinSIDX2_MB_20090820[1].hex SWiNX22[1].pdf Just saw your reply today... hope this helps you. I think you can source all these parts for under $10.
  6. n00b question before etching

    You might be interested in these two files. They are what I used. The Swin sid board is interesting. You may prefer it over building a sid. It does not have the filter bug, has additional voices, custom wave forms and for what sid chips are selling for you can build it as a double sid for less then the cost of 1 sid chip or commodore 64. You also have a much simpler single voltage power supply to think about.  The advantages of 2 sids in one box are many here are just a few ideas: stereo, multiple voices, detune for fatter sounds... bankstick edits fliped[1].pdf SWiNX22MC resized and updated[1].pdf
  7. mnmlCore

    Just a thought but if redesigning the core would it be worth it to consider a newer processor? There is a lot of newer technology out there now. I understand the reason not to as there is software dev involved.
  8. Standalone_TPD.jpeg

    Thanks for the details. It looks really great. I have one built and working and will be getting access to a shop bot in a few weeks to make the panel and case.
  9. Standalone_TPD.jpeg

    Looks great is that a thin sheet of blue plexi over the clear plexi?
  10. Harmonic Table Matrix

    You can prototype with just 1 din and 1 dout. Once you have the basic idea up and running you can add to it. Much faster to start with something small and then build on your successes. There is even a matrix pcb that you could bread board a few tact switches for very little $ and have a test environment up and running very quickly. Maybe even a day or two...   The only other part you would need is the core and core PCB:   Good luck with it looks fun!
  11. Harmonic Table Matrix

    It looks like you would need 3 Dout in the above diagram or you are not going to have the button count you want. The way it is drawn you will have 3 sets of duplicate buttons. That does not sound like what you want. You could split the lines like you show for the velocity section if you feel you will never want to know velocity if you are hitting the same notes in multiple sections at the same time. This use case for scanning all 3 sections would come up if you were playing cords, slides and if you were playing a bass section and a melody on the other hand. There are likely other use cases if you consider things too. Splitting lines really does not make sense from a design perspective though as the CMOS cost is very low compared to button cost. If you are wanting to reduce components or costs it might make more sense to only start with one section and have an octave button and design with a modular approach where you can add sections if and when needed or wanted. Antichambre is basically saying the same above, hope this is giving you some other thoughts and hints around his initial "Why" question.
  12. WTB: SEQ v4

    The beast case is way better quality. It would be worth your time to contact him to see if he can put together the rest of the case for you.
  13. WTB: SEQ v4

    Depends on what your skills or tools are. If you are comfortable working in wood or metal or know someone that is finishing off the case would be doable. If you are not comfortable and do not know someone that is. You may want to look into local maker spaces and see what you have for local resources. If you do not have local resources your best bet would be to either order the acrylic case, the hendrich case or request a custom order from Julian. You have a lot of options you just need to decide what you want to do. The lead time on the case can be quite long so that really should be the first order of business. the acrylic case may be the fastest to get. You do not mention a time frame. The other option is keeping an eye on the flea market and one will come around. they seem to be going in the 600-1000 price range depending on options.
  14. MBSEQ V4 build with MIDI, CV and DIGITAL OUT

    Excellent build it looks great!
  15. Describe the MIDI Router of your dream?!

    A way to quickly and easily switch to a new route and then switch back. Use case in a live performance is to switch to a second drum machine for a small section say 4 beats for different sound for accent and then want to switch right back. Could be used for other parts as well. Say for a lead part, especially when making a program change on an instrument when the audio drops or something weird happens when you make a program change or you want to create sustain on a part  but want the pattern to come back in without cutting off the sustain. With a poly synth it is easy to set the same sound to come back in on a second poly within the synth. There are other ways to do this but a route changes vs channel change on the sequencer might be more fun and flexible in live settings.