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Therezin

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Posts posted by Therezin

  1. There P&P to the UK is a bit on the high side though.

    Correction. Their P&P to the UK is absurd. They wanted $58 shipping on a $30 display. Fortunately, I mentioned that on here and c0nsumer was nice enough to send me one of his surplus ones using the USPS rather than FedEx, which worked out a lot cheaper. Maybe one of the americans on the site here would be nice enough to do the same for you?

  2. Welcome to the forum. You'll find we're all pretty friendly 'round here (well, mostly). And controlling channel faders and transport buttons is one of the most common uses of the midibox platform. Your best bet's the MB64 if you just want faders and buttons, MB64e if you want rotary encoders ("endless pots") or the MBLC if you want motorised faders.

  3. I just walked into my local electronics shop (Lichfield Electronics) with the parts list. He hadn't got a B40C800 either, but the guy in the shop assured me the one he gave me (a DB104G) would do the job just as well. He carried all the parts I needed except for the 330nF ceramic cap and the 7809 - the 330nano I used a mylar cap for (marginally better anyway, apparently) and the 7809 he only had in 100mA, so I went to maplin and got a 2A 78S09CV.

    Support your local electronics shop!  :P

  4. ST and TI both make 2 amp 7805's in a TO-220 package. Thats what I'm using and you should check them out since normally they only go to one amp in the medium size package and after crunching the numbers, I can see getting to over 1 amp with a C control surface

    @ Mr. modnaR:

    Maplin sell these in the UK, I used one on my optimised PSU. They've got them in 5, 9, 12 or 15V for 77p.

    Part numbers:

    L78S09CV - UJ55K

    L78S05CV - UJ54K

  5. @Therezin

    Nice Site! Thats what i was looking for all the time! Thanks!!  ;D :D

    Thanks to you too - I thought the best way to learn what I'm doing would be to document it. It also means I can help out other forum members. Glad to know I can help!

  6. Right, I've got it finished and I'm just about to upload some photos to my site so everyone can laugh at my dodgy soldering "skills", but first I have a question: When I turn my power switch to the "off" position, the voltage drops a little, (around 1-1.5V) then slowly goes down. I assume this is the capacitors discharging, but I find it rather odd. Is this normal?

  7. The 10.7V I think should be ok, as long as you were testing without anything connected to the PSU - it will deliver a slightly higher voltage when there's no load on it. I think mine puts out about 9.8v or thereabouts. As for the 5VDC, this strikes me as very odd. You say the PSU was powering a C64 with no errors, so it must be working - but for that it should be giving 5VDC on the pins. I have to admit I'm stumped by this, anyone else come across it?

  8. Just buy a din 7 connector (same as the c64 psu) and make the circuit on protoboard

    If you have a C64 case, you may as well do what I did and re-use the power socket and switch from the C64 as well. You'll have to bend a few pins on the switch to get them to the spacing on a piece of veroboard, but it's no big deal. You could even use the 2 controller sockets for banksticks, which is what I plan to do.

    The pins from the switch work as follows:

    Switch 'down' (switch rocked down towards pins):
    
      x  x
      |  |   <--connected
      x  x
    
      x  x
    
    Switch 'up' (labeled 'on' on c64 metal plate)
    
      x  x
    
      x  x
      |  |
      x  x
    

    I'll probably post some photos of my finished one in a few days once it's done, if you can wait that long.

  9. I second Altitude, it's definitely the way to go. I've not seen a board layout for the optimised PSU, but it's simple enough to make it on protoboard, even if you've no circuit design experience. This is in fact what I've been doing for the past week or so (Yes, I know I'm slow, I don't have much free time hehe).

  10. you have to remember that the ground on the sid module goes all around the chip. the connection J2 on the sid module has +5VDC and a GND pin. it is there that the chip gets it's ground.

    hope this helps.

    ps i had trouble understanding this too at first, but i'm getting there thanks to the kind souls on this forum.  8)

    Thanks man, I appreciate the quick answer. Time to get soldering methinks..

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