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Daqarta for DOS
Data AcQuisition And Real-Time Analysis
Shareware for Legacy Systems
(Use Daqarta for Windows with modern systems)

From the Daqarta for DOS Help system:

Daqarta LPTX Printer Files for MUX Model:

The MUX (Multiplex) model is the most complex of the LPTX options, allowing both ADC and DAC operation. Although complete schematic and board layout files are provided only for this model, the simpler active DAC or SAR models can be constructed from the same circuit by simply omitting the unneeded CD4053 sample/hold multiplexer switch and related parts, and adding jumpers as needed.

The LPTX Help file includes more information about this particular circuit, plus a complete parts list. It also includes detailed theory about each section of the circuit, as well as comprehensive printed circuit fabrication techniques that you can use for this or other circuit boards.

The DigOut model and passive DAC and SAR models can be assembled free-form into a DB25 connector shell without a circuit board.

The following .ZIP files contain schematic (.SCM) and board layout (.BRD) files for various printers. Many 9-pin dot matrix printers emulate the Epson FX format, and likewise many 24-pin models emulate the Epson LQ format. Laser printers usually emulate the Hewlett-Packard LaserJet PCL format. An ink jet printer might emulate any of these.

Note that these files are NOT PostScript. If your printer supports PostScript via a manual switch, make sure it is in its native or PCL mode.

CAUTION: A file may appear to print properly on your printer, but the scaling may be wrong. Scaling doesn't matter for the schematic, but the board scaling must be correct or things won't fit. The simplest way to check scaling is to measure the width of the board edge outline at the top of the layout. If it's not 2.5 inches, try an alternate file.

If none of the printer formats gives satisfactory results with your printer, please contact us for other file formats.

The print resolution in Dots Per Inch (DPI) is shown for each file.

  • NEW: MuxBrd.PDF board layout and MuxScm.PDF schematic generously provided by Karstein Eriksen using PCL2PDF Evaluation from Visual Software.
  • EPSON9.ZIP (16 Kbytes) Epson-type 9-pin dot matrix. Includes Epson FX, MX, IBM Proprinter, most 9-pin printers. 120 DPI.

  • EPSON24.ZIP (29 Kbytes) Epson-type 24-pin dot matrix. Includes Epson LQ series, most other 24-pin printers. 180 DPI.

  • LASERJET.ZIP (18 Kbytes) Original Hewlett-Packard LaserJet with 59K memory installed. 75 DPI.

  • LASRJET2.ZIP (41 Kbytes) Hewlett-Packard LaserJet Plus, LaserJet II, most other laser or LED printers, some DeskJets. 150 DPI.

  • PAINTJET.ZIP (47 Kbytes) Hewlett-Packard PaintJet, DeskJet, many other ink jet printers. 180 DPI.

  • QUIETJET.ZIP (55 Kbytes) Hewlett-Packard QuietJet and QuietJet Plus with switch 5 down. 192 DPI.

  • THINKJET.ZIP (26 Kbytes) Hewlett-Packard ThinkJet with switch 5 down. The board layout consists of separate THINKTOP.BRD and THINKBOT.BRD files. 96 DPI.

After downloading, unzip the file and print the separate .SCM and .BRD files with the DOS COPY command, using the /B Binary file option. For example, EPSON9.ZIP contains EPSON9.SCM and EPSON9.BRD files for 9-pin Epson-format printers. To print the board layout, use:
where 'n' is the LPT number of the printer you want to use. (You must use the /B with COPY to prevent it from halting when it encounters a data byte with the same value as the text End Of File marker.)


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