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mescalinum

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  1. Selling this Midibox SID consisting of CORE+SID+LCD+MemoryBank modules, plus this very unique enclosure made from a C64 enclosure. Panel was temporary, you may want to improve it. Price 50€. Can't verify the functioning status. It used to work (both as a synth and as a SID player) when I built this ~9 years ago. Shipping cost is 25-30€, see this document for details. Can find some cheaper service if you want to save some money.
  2. I first used a manual iron saw (30-40cm blade). Then I smoothed the cut with a belt sander, and then used fine-grain sandpaper - sticked on a very straight plane - to refinish by hand. If you do not have belt sander you can just do papersand by hand... it's just a bit more work.
  3. p.s. here a couple of shots of the unfinished boy - I steel need to make the panel, I can't find detended encoders through local shop (they have gray code rotary encoders at 5 bits only), I'll have to search on internet shops
  4. damn! :D i got some time to unmount and check CORE module: air-wire from IIC pin to R12 was soldered to the wrong node so I fixed it, and the midibox started to see external banks :) sorry for the fuss (I don't know how to put [sOLVED] in the subject so that this can be helpful to someone...) cheers!
  5. I tried also 24LC256 ICs (always from Microchip) but same result <No BankStick> this should exclude a fried IC. the only thing I couldn't check now is the 2 wire IIC bus... later I'll dismount the core module again and do some more tests... btw, I remember having tested with OHMmeter every single wire after etching CORE, prior to begin soldering
  6. thanks for your interest sorry, I do not have a camera that can take decent photos, so I toke a couple, and added visual hints to one, in case you can't see every spot (click to enlarge) by the way, here are some test I made: (I'm repeating test now, just before hitting SEND) with the bankstick circuit unplugged and ICs unmounted(looking at the schematic I made in eagle), using OHM-Meter: - every IC pin that should be connected to GND, it is in connection with GND pin. every other: not. - every IC pin that should be connected to +5V, it is in connection with +5V pin. every other: not. - the 2 wire data bus does not touch +5V neither GND - the 2 wire data bus is consistent (J4:2 touches only IC1:6 and IC2:6, J4:3 touches only IC1:5 and IC2:5) with the bankstick attached to core, and core powered on, I can measure 5V between GND and 5v on every IC that should exclude problems in the bankstick circuit itself R2: ok (brown,black,red,gold = 10*100 = 1k) R12: ok 1k too as I said (text in the photo), I refer to red wire on ribbon cable as GND, and I measured +5V between GND and +5V on the bankstick circuit given the tests I made above, it should be very unlikely. unfortunately I don't have access to a logic probe or an oscilloscope... I don't know what to do then. every other part is functional (sid functions, audio output, midi io, etc..)
  7. hi I'm finishing a modular MBSID. actually I've done 1 CORE_V3, 1 SID_V2, 1 LCD 16x2 and works like a charm. I wanted to add banksticks. I made a little two-socket on veroboard (see attached image) (I used eagle cause it helped me to cross the less wires while working on a single layer) anyway, the bankstick appears dead, I double-double-checked solderings, wiring, checked for shorts. I also checked that I have the two air-wires on the core (J4:SC->pin28 and J10:PWM->pin17). the symptom is: when I send program change, it says <No Bankstick>. I'm stuck, I don't know what to troubleshoot further any help would be appreciated, thank you EDIT: oops, it seems the attached image never got here. here it is:
  8. what's this approach are you talking about? I ask because I want to use a multitap transfo (0 - 4.5 - 6 - 7.5 - 9 - 12 - 15 - 18 - 24) to power a SID module and a CORE module, but I've read bad things on this forum thread (like the low voltage "shifting" up a lot). I was thinking about two options: 1) use 0 - 7.5 for sending it to CORE module, getting stable 5 VDC, and use 0 - 15 (or eventually 9 - 24) for sending it to SID module, getting stable 12 VDC. this basically puts the two loads on the same windings, right? 2) cut the secondary winding between 7.5 and 9, so that I get two secondary windings. (this isn't multitapped anymore, right?) that way I have 7.5 VAC on 0 - 7.5 pins, and 15 VAC on 9 - 24 pins what do you think about that? any counter-indication? I'd prefer option 1, cause I don't know which is the right wire to cut: I should cut the winding between 7.5 and 9, but two wires are attached to pin 7.5 and two wires are attached to pin 9. If I do the wrong cut I trash the transformer. (moreover, I'm not even sure 2 is completely correct)
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