kogz23

Hi, the core is set up like in the MB808, with the same amount of DINs and DOUTS. I ran the 5v regulated from the TR to J2 (post reg) on the core. I ran regulated 15vdc to J1, and also unregulated 20v AC to J1 (obviously all not at the same time!!!). The vreg is a 7805 in a TO220. I'm just about to get back to it. I thought it was a power problem as it was working before with external power supply. The important word being "was", I'm gonna go back to the power supply and see how it works with that. Cheers for the ideas! Al

I think I fried my PIC. I'm not sure how, but have an idea. I'm trying to install an MB808 seq into a TR-808 which has a dead sequencer. So far so good, with a little help from here and there. The problem is trying to find a stable power source. I tried running of the regulated 5V from the TR, no luck. Kept on crashing. Same with the 15v supply. So I guessed that I wasn't getting enough amps. SO, probably very stupidly, I plugged into the 20VAC coming from the Tr's transformer. For half an hour or so it was working well, though the regulator was getting pretty hot (surprise surprise!). Then things started to deteriorate. All the leds started to flash. The LCD has !!! flashing, when I turn on it briefly says "MIOS!W1 ©311" (or something to that effect. So my question is, is it likely that the excess voltage fried the chip? I was moving stuff around so it is very possible that something shorted etc, so it maybe it would be more likely to be that? I'm thinking my next option should be to get a transformer and run it parallel with the TR's transformer to get a solid voltage and amperage. Power does tend to be a stumbling block, even as it is the basis for everything! Sorry for the excess ramble. Any ideas/suggestions on how to safe this classic would be greatly appreciated! Cheers Al Sorry if I drifted off the original seq question!

Hi, yes it was the power. I changed the power source and all's good. I've only hooked up the leds for the 16 steps. I am going to add the other 17 buttons, for pattern/song select etc. But I'm thinking of leaving out the 17 leds that go with these buttons. Do you think it would be a problem for navigating your way around? Or do you think there are any leds out of these 17 that would be essential? Cheers Al

Hi, the encoder selects the other instruments and they behave as expected. Someone else suggested that it could be a power issue, which makes sense as when I select ALL all of the leds light up very briefly then it crashes. Cheers Al

Hi, the mios is 1.9g and the firmware is the setup_808_with_swingpot.hex version. cheers

Hi, I have a MB-808 style sequencer which seems to be working apart from one problem. When I select ALL with the instrument select encoder it crashes the machine and does a force reboot. Any ideas? Cheers Al

Hi, so I checked the din's and they are correctly labeled. But in doing so I found my error. S1 on the din "in" is not labeled. So I had wired S1 to S0 on J9. Doh! Now it appears to be working. Wicked!!! On to testing and trying to delve into how much this sequencer seems to offer! Sure I'll only be scratching the surface though...thanks for your help, sorry for wasting your time with my stupid error! I do have one more question. I'm not sure how I'm supposed to copy the correct setup file into the SD card. Cheers Al

Yes, the 2 examples are the way I wired it, or meant to wire it! I'm trying to find an error in wiring right now. To narrow down any errors would it work to unplug all the din's apart from one jumper and test the encoders or pots that are connected to that jumper? That way it might eliminate errors that might be elsewhere...Or does everything have to be connected for it to work? Also I'm assuming vs is common throughout. Is that correct? Cheers Al

Hi, my design is based on the seqv3/4 layout, not wilba's. I'm not sure about the hwcfg.v4 file. Is that the one I'm supposed to put on the sd card? Thanks Al

Hi, thanks for the tips. So I took the SD card out and checked that S0/S1 go to the right places. I do have power selected. I have the 220 ohm resistor network (although I made my own with 4 resistors as I haven't got an array). On 4th(or 5th, lost count!) inspection I saw a couple of grounds were missing. The result: after powering on the firmware loads and now some leds light. Every 4th led of the step leds (1st, 5th, 9th and 13th) are lit. On power up Track 1 led flashes a few times then goes out. Layer A is lit as is Edit led. Apart from this there is no change, the encoders and buttons do nothing. I feel like I'm getting closer though. Any ideas? Thanks again Al

Hi, so I'm all fairly new to this midibox stuff, so please bare with me. I've completed building my seq4 but am having some difficulties. When I power on all seems good with the stm32. I've loaded the latest hex file, it reads the sd card and seems well. However the din and dout doesn't seem to be working at all. No encoders, buttons or leds do anything. The douts and dins are getting power. The boards are bought from smashtv, so I don't think that is a problem. I've looked for shorts etc and have so far found nothing. I've tried unplugging various parts of the din's and try and get just one section interacting, but know luck. I'm sure I'm missing something very simple. Could it be that I have not copied the correct MBSEQ_HW.V4 file into the sd? I must admit that I was struggling on how to correctly get that file onto my SD and probably did it wrong.. Anyway, hope that wasn't to much of a ramble. Any suggestions would be appreciated! Cheers Al p.s. my soldering iron just literally blew up, the cable got so twisted it shorted itself. Woops!

Hello, I'm a total newbie here, so please bare with me. Hopefully this post is in the right area! I can not login to the wiki, it keeps telling me my password or username is incorrect, and I know they're not! I'm using Firefox 3.5 on a mac with cookies enabled. I'm sure I'm missing something obviuos... cheers