That looks like one of these
http://www.serdashop.com/CHiLLandPhilAdapter

As far as I know, it only works for the Dreamblaster S1, S2, X1, and X2 modules.

Correct. Most MIDI daughterboards also require 12V, which this adapter does not supply. It is only suitable for use with Serdaco's Dreamblaster boards.

Could this be modded to have +12V by taking it from ... well, for example a serial port ? (or just by generating it from 5V)

Deksor wrote:

Could this be modded to have +12V by taking it from ... well, for example a serial port ? (or just by generating it from 5V)

Yes, but please note you need +12V and -12V. --> you can generate this from the 5V, indeed :
I have done this once, for a friend, modded the chil n phil by adding a DC/DC converter.
And his works.

If there is sufficient interest, I can make a new chill n phil version that supports all waveblaster cards.
Note: many old module pcb's are large, they may obstruct other ports when place directly on the game port. An extender cable can help.

The heavy duty version (with real midi port) is the full chill board http://www.serdashop.com/Webwinkel-Product-19 … ion-V2-KIT.html,
it also generates the +12V and -12V from 5V. In this case a very clean 5V from an oversized linear regulator.

@dreamblaster
I made a Voltage converter once for a similar adapter as the "Chill Limited Edition' V2 KIT". IIRC it made -12V out of 12V using an NE555 timer. But this method creates an alternating voltage that is levelled to the target voltage afterwards. The alternating current gave me audible interference regardless of the capacitors used. I read a similar problem was later found in the 'Doxbox' commercial enclosures. So, I suppose you found a way to prevent such interference?, could you please tell some more about that? thanks.

Gerwin, typically this is done with a boost converter running at a fairly obscene PWM clock. This way, the harmonics are well above the audible range and also easier to filter. They're available as integrated chips requiring minimal external components.

Your application does sound interesting. I'd love to hear more if you want to continue via PM.

gerwin wrote:

@dreamblaster
I made a Voltage converter once for a similar adapter as the "Chill Limited Edition' V2 KIT". IIRC it made -12V out of 12V using an NE555 timer. But this method creates an alternating voltage that is levelled to the target voltage afterwards. The alternating current gave me audible interference regardless of the capacitors used. I read a similar problem was later found in the 'Doxbox' commercial enclosures. So, I suppose you found a way to prevent such interference?, could you please tell some more about that? thanks.

Yes, it uses a dc dc converter that switches at a frequency well above audible frequency, and has low ripple.

dreamblaster wrote:

Yes, it uses a dc dc converter that switches at a frequency well above audible frequency, and has low ripple.

That sounds like a good solution.

gdjacobs wrote:

Your application does sound interesting. I'd love to hear more if you want to continue via PM.

Oh, it is this thing I made some years ago (picture). It is a waveblaster daughterboard adapter for internal use.
- It requires the connection of a Molex connector + Since I could not generate it then: a -12V line (blue).
- It has one or two midi in connectors (brown+orange). It is pretty simple, cannot use it simultaneously of course.
- Daughterboard Reset circuit with variable resistor, to make the reset pulse adjustable. Also has a Reset button.
- On/Off switch to switch daughterboard without reboot. With power LED.
- Can flip stereo by rotating the 4-pin audio connector.

gerwin wrote:

dreamblaster wrote:

Yes, it uses a dc dc converter that switches at a frequency well above audible frequency, and has low ripple.

That sounds like a good solution.

Look nice.
If you like, I can send you such small DC/DC block, so you can modifiy your setup.
pm me (with your address)