ChrisHipgrave

Hi, Last night i tried to upload the DIN interconnection test and something weird happened. It showed me an error and the LCD came up with bars along the top row. I tried to upload the test again and nothing, so i tried to upload the main.hex from the MIDIbox SID file. This did not work either and MIOS studio showed a message saying something like "MIOS is already loaded". Anyway, i left it for a night and tried again a minute ago. This time it was fine and i re-loaded the main.hex file. The problem is that my buttons are still not working, Could it mean that there is a short somewhere and that is why i had the strange behaviour from it? Thank you Chris

Hi all, I made my MIDIbox SID as a university project and now i have to do a write up about it (not that it is finished). Anyway, i was wondering whether anyone had some sort of diagram showing how MIOS interacts with the PIC? Also any other diagrams of stuff would be much appreciated (I need to fill up more space)! Thank you Chris

yeah sorry, thats what i meant. I've soldered the five wires correctly.

Hi, I've checked and checked the connections and they all seem fine. I changed the double row IDC connector and soldered the four wire from the CORE to the DIN but now nothing is working. ??? I'm very confused. Can anyone help me on this? Thank you Chris

Yes i've connected J4 VS to the rotary encoder and to the menu button and button 5. Is this not correct? It shows this on the 2x20enc.pdf. Should i connect them to the VS on J3? Chris

Hi, For some reason, the menu button, button 5, and the rotary encoder does not work on my MIDIbox SID. All the connections are correct and i've swapped around the 74HC165's a couple of times but no luck. Is there anything else it could be? Another thing, i've connected J1 of the the DIN to J9 of the core with ribbon cable and a double row IDC connector so J8 is going to the second row of J1 on the DIN. Could this be why? Thank you Chris

Hi, Does anyone know where i can get a rotary encoder from in the UK? I need one really quick. Thanks Chris

Ok thanks, so are the 10k pots log or lin? Thanks Chris

Hi all, So i finally got the first sound out of my MIDIbox SID! Thanks to Tim for all your help. I still have a couple of questions though. I want to add a contrast pot to the synth and i'm not sure how to do it. Do i just remove the trimmer pots on the CORE and replace them for some pots which i can fix to the box? If so, what value are they? Also, i'm using a 2x20 LCD screen from SmashTV and wondered what the four holes on the right hand side are for? Thank you Chris

Hi, So, i got a new CORE module from SmashTV and i've built it up. I checked my PSU again and i'm getting 5.15v and 14.18v. The first thing i tested was the current from the 5v of the PSU to vd of the CORE and i'm still getting 0mA. So i'm guessing that it's something to do with my PSU? Does anybody know what it could be? Thank you Chris

I've checked all the pins and they seem fine. Is there anything else it could be? Thank you Chris

ok so i checked all the pins in the list and re-soldered a dodgy resistor. The pins were not touching each other and the board is from SmashTV so the connections cannot be wrong, can they? Tried it again and now i'm getting 4.5mA without the PIC and around 90mA with.

Oh yeah, sorry i had the multimeter on the wrong setting. I'm getting a reading of about 14mA without the PIC and about 100mA with, this is wrong is it? Thank you Chris

Yep the optimized PSU and j2 and the 7805 has been removed and the holes bridged. I wasn't measuring the current correctly before, but i snipped the +5v cable and measured the break and still 0mA. Chris

I'm getting 5.18v DC from the 5v and 14.18v DC from the 14v. With the multimeter on the current setting it's reading 0. Is that right? Thank you Chris