Gilderflukeco Quad Piggyback Digital to Analog converter Manuel d'utilisateur télécharger pdf

printed: February 27, 1999

Preliminary Instructions

for

Quad Piggyback Digital to Analog (D/A) Converter

The Quad Piggyback D/A converter is a small printed circuit card which can be

attached directly to any playback-only MICRO MACs ÔBrickÕ card. When installed, this card

converts all 4 eight bit channels on a brick to four separate analog outputs. Two of the

four output channels on the Brick cards J6 connector are taken over by the installation of

the Quad Piggyback D/A. Channels zero and one of the brick can still be used as

normally as digital outputs, but will carry the same data as is converted to an analog

signals on the Quad Piggyback D/A card. What would normally be used as channel two

of the Brick is used as a TTL level input for feeding test data into the Quad Piggyback D/A.

The 1/4 J6 which would normally be used as channel threeÕs output from the brick is

converted into a 1/4 J6/A output and carries all four of the analog output channels.

Installation:

1) Remove the fuse ÔF4Õ (the one closest to the edge of the card) from the MICRO MACs

card.

2) Bend down the end of the fuse holder which will come precariously close to the

Quad Piggyback D/A card when it is installed (or insulate this end of the fuse holder with

some double faced tape or similar material).

3) Remove the two ULN2803 chips from the two sockets near the large filter capacitor

(C1).

4) Plug the Quad Piggyback D/A converter into the two 18 pin sockets you removed

the ULN2803Õs from and the long single row header that runs down the center of the

board (JP-3).

GILDERFLUKE & CO. ¥ 205 SOUTH FLOWER ST. ¥ BURBANK, CALIF. 91502-2102 ¥ 818/840-9484 ¥ FAX818/840-9485

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printed: February 27, 1999Preliminary InstructionsforQuad Piggyback Digital to Analog (D/A) ConverterThe Quad Piggyback D/A converter is a small pr

Outputs:Note that only the second two channels of the J6 output gets changed by theinstallation of a Quad Piggyback D/A card:wire number color wire f

The first two channels are used and connected (if the data isnÕt being used as asource for an analog signal) just like any other standard 1/4 J6.The

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Gilderflukeco Quad Piggyback Digital to Analog converter Manuel d'utilisateur