mesak
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Posts posted by mesak
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well, i have the normal PSU and it sounds like this: http://www.mrvelcrofastener.com/sid/humina.wav - i think it's terrible, can it be just because the PSU isn't the "optimized" type? the hum clearlty changes when switchin the filter on/off to oscillators, doesn't get more silent or loud but just different.
but if i make the optimised PSU do i need to make changes to CORE or SID module?
cheers
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ok, somehow i had managed to connect all LEDs the wrong way :(
but it's fixed now. works ok. except still one row in the LED matrix is lit all the time, doesn't make sense to me. ???
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yo! i had a small break in buidling the SID box, but now back in business. :P
i just had all the cables finished and so i was able to make more testing with the interface. so, here's my problem: all the LEDs in the LED matrix are lit (except one, i think it's more likely that i've connected it wrong rather than the led beign broken..) all the time. all buttos seem to be working ok i guess, as encoders too. other LEDs should be ok too, just the matrix stays on all the time. what might be the problem? i've checked the cabling and it should be right but obviously there's something i've missed... they shouldnt get lit at all if they would be soldered the wrong way??
cheers
t
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well, i just should have read the instructions more carefully...
cheers
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f*ck!!
it's ONLY encoders that will do the job?!
shieet.
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i''m moving on with building the CS. now when testing the 10k pots, they only alter the desired parameter by one digit at a time only when turning the pot all the way - only increasing or decreasing depending which way it's connected - i've tried with cabling all possible variations and this is all i get. the pots are ok 'cos i've tried with several, not just one pot.
am i missing something here? ? ???
cheers
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yes :D
the one on the right (from VIC20) even has it's own power switch on it so i didn't need to make it in the midibox!
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...however, if it dies on you, replacing that internal fuse is a hellish process....
it's very easy with these sort of PSU's, the fuse is screwed on the back:
anyway, the ground hum is the thing. more testing....
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ok, i will try some different configs. but is it so that you will get some serious hum anyway (ofcourse if you really crank it up you get lots of noise from everything)?
i'm using the original c64 pwer supply...
i just got the lcd working ok!! :D :D
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i have done the shorting. it helps a bit but the "main hum" remains wheter the ground is connected or not. also my friend is building his own sidbox at the same time and i tested my system with his SID-module - the hum is the same. so it means my sid is ok (or both sids are damaged...?)
cheers
ps. also there's a power led included in the power pcb - now when the sid and the core are also connected the led seems to flicker to the hum frequency - i think it didn't when i first tried the power with only the led connected to it. removing the led however doesn't affect the humming...
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yo! i'm proceeding nicely with the SID - can't wait to get it up and running for real! :P
i made a power pcb for the unit (see the pics - it includes bankstick as you can see...) but when i put the synth on i got quite loud ground hum there too . is it possible that i screwed up the power connections somehow (it looks more messy than it is really) or can it be because i didn't make the optimized PSU but the basic one? i'm using original c64 power and tested the thing with two separate PSU's with same results so that should be fine. also, i have done the bypass caps on the sid & core.
i'm not sure how to get rid of the hum... :(
cheers
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A vinyl cutter is a computer controlled machine that cuts images or text or whatever on a sheet of thin adhesive vinyl with a tiny blade. After cutting, you manually dig or weed away the parts of the vinyl you don't want on the design. Then you stick the weeded design to the target surface with the help of transfer tape (a bit like masking tape but as a sheet of suitable size). So basically the lettering on my MBSID is tiny letters that are cut out of adhesive tape. Seems to be durable, but it's possible to scrape it away using your fingernails with some force. And you can't do as small letters as you can with some other methods. But it seems to work just fine for me!
hi jurbo! where did you make it or do you have a access to use such machine by your self? (you're from finland, right?)
peace
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hi, thanks for info! :)
i have not been able to get the endless rotary encoder in local mailorder shops in finland, so i might aswell check while visiting in uk.... otherwise i just need to order it from anywhere but it feels stupid to pay all the postage for just one encoder....
cheers
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anyone knows a good shop for buing parts in London UK?
cheers
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hmm, but is there something wrong with the cable connections rather than in the LCD compatibility? i'm not quite sure what to do next... ???
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i'm working with a same LCD module and used the Displaytech 2x20 datasheet that mike sent.
now here's what the LCD displays when booting the system:
MEOS 1.4z (this for maybe 2 seconds)
then for REALLY short time there flashes something like
MEHEbootSEH Z1;a (this might be not correct due to the time that the message is shown)
then it goes to
A 1 1 C1 - - -
and stays there. sound can be heard ok. but if i change the preset with Jsynth, the screen stays always the same. is this because i don't have any buttons or encoders connected to core yet? should the LCD act or response to changes? or is there somethig still wrong? the LCD is lit too...
cheers!!
(finnish first!) :)
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yo yo!
i was just wondering that CORE's midi out is propably out only - no midi through?
cheers
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ok, i have pins in two rows in my LCD.... but the nubers might match, thanks!
or anyone elso knows for sure?
cheers
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i got a 2x20 LCD with backlight from Mikes-Elektronikseite. it says DEM 20231 SYH-PY / V 442 on the back, but i can't find a datasheet for it. can someone help me out so i can proceed with soldering :)
cheers
t
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ok, i downloaded the MIOSStudio to the Win2000 i was using with Midi-OX.... and this time it worked fine - and i get THE SWEET SOUND OF THE SID!!! :D
now i can proceed with building the cs.... ;)
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well, eh, ofcourse. how stupid of me... must have been too many hours fighting with the midex... :)
thanks!
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hello,
i had a long day trying to get the MIOS uploaded to midibox SID.
PIC was pre-burned in joergs midishop and i got the upload request ok when powering up the sid.
i was using Steinberg Midex 3 and Midi-OX under Windows 2000. but i didn't get the MIOS running since the SID kept sending the request every 2 seconds, so i was thinking there must be somenthing wrong in the connections. so i made all the troubleshooting for midi in connections and octocoupler with no luck. then i found out that there was something wrong with midex/midi-ox - no midi activity led flashing in midex and midi-ox was chrashing. i made the midi-ox's send/receive test which failed, i still don't know what was wrong.
but luckily i also had a MAC nearby so i finally tried to make the upload with that. no problems. midex worked fine and MIOS seemed to go ok to PIC since it stopped sending the request sysex.
but then i wasn't able to get any sound out from SID. i was using Jsynthlib but didn't get any signal from the SID... then i had to call it a day. will do more testing tomorrow... i wonder if there's something wrong with the MIOS after all? i hope i didn't mess it up completely.
is there a initial patch in SID? if i just can't get Jsynthlib to work, should i get a sound out from SID with just a basic midi keyboard?
well, just wanted to write some lines of these experiments. i really wonder why midex didn't work out with windows. i'm using midex8 and winXP a lot for basic sysex dumping for elektron's instruments and it's going ok...
cheers!
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ok, thanks! ;)
i will be using VIC20's PSU, should be just the same. it has 2 separate fuses, while original C64 PSU has only one... but otherwise the specs seem to be just the same.
the bonus in VIC's powersupply is that i has a powerswitch on the PSU! so i don't have to make it in the sidbox...
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again, in this case is the basic PSU still ok, or would the "PSU optimized for 4xSID" be reecommended? i mean does the control surface and LCD go ok with the most basic PSU...?
cheers
optimized c64 psu - f***in AWESOME!!!
in MIDIbox SID
Posted
oh yes, it says: "(3) the 7805 regulators of the core modules have been removed. The Input/Output line
of this IC has been shortened so that C5 of the core module (ca. 1000 uF is ok)
is directly connected to the +5V input"
this is also shown in the diagram.
but what about the 7809? "(2) a 7809 removes the AC part of the SID module supply voltage. Without this
additional voltage regulator you may hear a 50/60 Hz humming sound at the SID output"
the SID module will remain the same? atleast there's no changes in the diagram....
cheers