Jump to content

alchemist

Members
 View Profile  See their activity

  • Posts

    106

  • Joined

  • Last visited

 Content Type 

Posts posted by alchemist

  6. 4xMBHP_CORE : need to solder LCD and MIDI components?

    in Parts Questions

    Posted · Edited by alchemist

    Hello,

     

    I have a question : in a multiple MBHP_CORE set-up (for a MIDIbox SID), do I need to solder the LCD and MIDI part for cores #2, #3 and #4, since there will be no LCD for them, and MIDI should go through J11?

     

    So, I could avoid to solder:

     

    - The regulator part: IC3, X1, C5 and C6 (power through J2)

    - The LCD part: P1, P2, T1, R4 (and R3?), but well use 1N4148 diodes for the CAN bus

    - The MIDI part: R5, R6, R7, R8, R11, D1 (recycled for CAN bus), IC2, J12, J13?

    - The DIN/DOUT buses: J8 and J9

    - The AIN/AOUT buses: J6 and J7

     

    So, there remain only the PIC, the oscillator, pull-ups resistors and filtering caps, J2, J4,  J10, J11, and some pins of J15

     

    Is it correct?

     

    EDIT: and do I need 1 banckstick per core, or is it shared from core #1 to other cores?

  8. +5V, +9V and +12V regulators from the same AC/DC adapter?

    in Parts Questions

  9. +5V, +9V and +12V regulators from the same AC/DC adapter?

    in Parts Questions

    Posted · Edited by alchemist

    Hello,

     

    Thank you for the reply !

     

    The power needed would be for

    - 4 x MBHP_CORE

    - 8 x MBHP_SID

    - 2 x MBHP_DOUT

    - 3 x MBHP_DIN

    - 4 x SID 6581 (+12V)

    - 4 x SID 8580 (+9V)

    - 1 x LCD display (20x2)

    - and about 80 LEDs for the Control Surface

     

    At term, I will use a C64 PSU, but this will come later, and I would like to use an other PSU before I get it.

     

    I will check the power needed by element, then compute the power consumed by each 78xx regulator.

  10. +5V, +9V and +12V regulators from the same AC/DC adapter?

    in Parts Questions

    Posted

    Hello,

     

    Can I plug in parallel three 78xx regulators to get +5, +9 and +12V from the same 15V DC adaptor ?

    Is it better to do that in parallel or serial (+12, then +9, then +5)? (its for a full MIDIbox SID set-up, with 4 cores, 4 6581 and 4 8580, hence the 3 voltages).

     

    For now, I plug a 9V DC for +5V and 15V DC for +12, but I would like to minimize the AC adaptors.

     

    I don't see a problem, but I could say an heresy, and would be sure I wouldn't overload the 78xx with too high voltage or drained current.

  20. C64 PSU + 6581 + 8580R5

    in MIDIbox SID

    Posted

    Hello,

     

    I have now 1 6581 and will get a v1 C64 (with a 2nd 6581).

    Later, I would like expand the config to have 4x6581 and 4x8580R5

     

    Is it possible to power all that configuration with the original C64 PSU and one 7809 ?

     

    I guess I could adapt the mbhp_8xsid_c64_psu_optimized.pdf document like that:

    - connect the 6581 as explained

    - connect the 8580R5 on the 7809 (+9V and ground)

     

    Will it work?

     

×
×
  • Create New...