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SuperBad

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  2. +/- 12V Dual Voltage PSU (was: Back to finish my FM)

    in Parts Archive

    Posted

    Well after my attempts at creating a power supply went up in smoke.  I got too busy to work on the FM.  I did find this power supply and just recieved it.  I have not wired it up, but for the money it appears to be a very sturdy supply.  I am going to have some time next week to try to finish.  I do have the core working and the FM OS is loaded, I have the majority of the solding done.  Next comes all the hooking up.  https://secure-checkout43.monstercommerce.com/2298362093/index.asp?PageAction=VIEWPROD&ProdID=439  is the url of the power supply.

  4. Power supply question (again sorry)

    in MIDIbox FM

    Posted

    What I was wondering was if I could replace the transformer with a 12.5 V supply and run it throught the circuitry to get both +12 and -12 out of it.  I have actually decided to try the other power supply Duggle suggested in this thread http://69.56.171.55/~midibox/forum/index.php?topic=3970.0 but I am terrible at making my own pcb's and my last attempt with stripboard worked briefly and then I released the magic smoke out of one of the capacitors :(  I am much better when I have a ready made PCB, but aren't we all.  Going to try making my own traces with solder on a piece of perfboard this weekend once I get some more caps, and a new Voltage reg.

    Bobby

  5. The FM PSU....

    in Parts Questions

    Posted

    mbfm_powersupply.gif

      I have a question.  I am going to try the PSU out.  My question relates to the 4 separate grounds that I see.  Do I connect these to a common ground?  the ones I am puzzled by are the one coming off each voltage regulator.  Any help is very much appreciated.

    Bobby

  8. Frontpanel Express and Hammond enclosures

    in Design Concepts

    Posted

    Not to post spam but try this guy... chris.montplaisir@alliedelec.com  He told me he can get hammond stuff pretty quickly.  I am getting ready to order an enclosure for myself.  Tell me a little more about how you are doing the Transaction with FPE.  I might do this with the design i have come up with for my FM.

    Bobby

  10. Power supply question (again sorry)

    in MIDIbox FM

    Posted

    My core module lives :)  So now I am forced to work on a power solution for my MBFM.  I discovered that I have a wall wart supply that has both a 12V 500ma line and a 12.5V 200ma line.  I would like to use the 12V line to power the core, and the 12.5V line to power the OPL board.  Is this possible?  is it a bad idea?  If it is doable..  Where should I start?  My other option will be to make the whole transformer power supply as shown on here, but I don't understand the mods I would need to do to get 5v to j1 on the core.  My core module is a Rev 2 from smash TV.

    Bobby

  12. Low voltage in the core

    in Testing/Troubleshooting

    Posted

    Thanks for the tips.  I did search for it..  The words voltage and core bring up a ton of posts.  I did not find what I was looking for though.  I Used the 5V because I had it nearby, and I just wanted to test the core module before proceeding further.  I have the FM module, and DIN modules ready, I just need to finish my DOUT.  Then I will be wiring the rest up to test it.  The 12v supply will be built soon, but I am very cautious when it comes to power.  I will be visiting radio shack today and trying to find a 8-9V 500ma min supply.

    I appreciate the forums help with this.

    Bobby

  13. Low voltage in the core

    in Testing/Troubleshooting

    Posted

    I just finished my core module, and I did like TK's page says and checked the voltage across certain pins in both the IC sockets.  I get a reading of 1.8V in each place.  I am using a 5V and 1amp Wall wart.  I am getting 5V at the input.  I just don't know how to up the voltage across the board.  Should I use a higher voltage power supply?  This is going into a Midibox FM.  Thanks for any help.

    Bobby

  16. 110 AC Fm PSU??

    in Parts Questions

    Posted

    Has anyone designed a 110 version of the FM powersupply?  Or any suggestions as to what works well in this application.  I would like to avoid using 2 wall warts one for +/- 12v and the other for 5v.  If I have to I will. 

    Thanks,

    Bobby

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