There are other A/D systems that interface to the PC printer port. I have not
developed code for any of these systems. Here are some that I have found.
Note, costs may vary from what I mention here.
|PC Data Acquisition kit 6093-KT (www.mpja.com)
||16-digital inputs, 11-multiplexed analog inputs (10-bit A/D),
8-digital outputs, 1-analog output. Cost about $125.
|12-bit resolution Data Acquisition kit 8418-KT (www.mpja.com)
||4-digital inputs, 8-multiplexed analog inputs (12-bit A/D),
4-digital outputs. Cost about $55.
|Computer operated 8-channel A/D converter kit 5293-RB (www.mpja.com)
||8-multiplexed analog inputs (8-bit A/D). Cost about $80.
|TMCPort modules. Various configurations (www.lptek.com)
||8-channel (8-bit and 12-bit systems). These systems
require a parallel port interface board, in addition to the basic systems. Digital
I/O, Counter/Timer, and Analog output systems are also available. Prices vary
depending on configuration.
LPTek furnishes an ActiveX OCX and drivers for use with
Visual Basic« and other Windows application languages.
|DacBook. Probably the highest performance, and highest
cost, parallel port systems (various models). (www.iotech.com)
||100 KHz A/D converter, 12-bit (/100 series) or 16-bit (/200
series). 100K reading/s sampling & real-time storage-to-disk. 8
differential- or 16 single-ended inputs, expandable to 256 channels. Channel/gain
sequencing at 10 Ás intervals, including up to 256 expansion channels. x1, 2, 4, or
8 programmable gain (other gains available with option cards). 512-location scan
memory for user-defined channel/gain sequencing of up to 256 channels. Triggerable
from analog, digital, or software, including pre-trigger. 24 general-purpose digital
I/O lines, expandable to 192. 16 high-speed digital-input lines, scannable at up to
100 KHz. Five programmable 16-bit counter-timers.
IOtech provides DaqBook/260
driver support for Visual Basic«, C++, & Delphi
for Windows 95/98/NT; Visual Basic & C++ for Windows 3.x;
QuickBasic, C, & Pascal for DOS;
8-channel, 12 bit resolution, parallel port data acquisition module. (www.bb-elec.com)
||Each channel is independently software
programmable at the following voltage ranges: 0 to +5V, 0 to +10V, -5V to +5V, -10 to
+10V. It has four TTL digital inputs and one TTL digital output. Cost about $95.
|PPIO-AIO8. An 8-channel, 12 bit
resolution parallel port analog/digital I/O board. (www.computerboards.com)
Other parallel port boards that may be of interest are PPIO-CTRO6 a
counter/timer board (Six 16-bit counters (two 8254 chips)
12-Bits digital I/O), and PPIO-DIO24H a 24-channel, high-drive capability,
digital I/O board.
|Use on LPT1, 2, 3, 4. Eight 12-bit A/D
channels. 7 digital I/O bits. CIO-EXP-16/32 compatible. Input
resolution: 12-bits (1 in 4096)
Input ranges: ▒10V, ▒5V, 0-10V
Range selection: Switch selectable
Max sample rate: 3 KHz
Trigger/timing: software polled
Number of digital I/O bits 7-bits TTL, 4 out, 3 in
Includes InstaCal « , installation, calibration and test software.
Supported by UniversalLibrary « (provides programming language support
for all DOS and Windows languages). Also supported by most third party,
high-level data acq. programs.
Prices for these boards range from US$100 to US$200.
|e-Lab, a complete lab bench in a
"box." This product from Mission Technology is easy to use
in VB applications, and is quite low cost for the features provided. $500.
||Consists of a two-channel scope, DMM, signal
generator (up to 4 MHz), a frequency counter, and a triple-output power
supply. The scope can sample at 50 M S/s, and stores 32K
samples. Sensitivity ranges from 5 V/div to 5 mV/div with a time
base that ranges from 10 mS/div to 0.1 uS/div. The power supply can
provide 5 V @ 350 mA and 0-8 V @ 200 mA. The e-lab also provides
three digital outputs for synchronization and control.
Engineering has a huge number of products for industrial automation.
Parallel versions are available for data logging and other applications
that require limited performance.
Technology Limited has a series of data acquisition products, both
software and hardware.
||The hardware ranges from low-cost ADC-10/12 and
ADC 40/42 (8-bit and 12-bit respectively, single and dual-ended inputs) data
loggers; to ADC-11/22, 10-bit units that provide 11 and 22 input channels,
respectively. The ADC-16 is an 8-channel, 16+ bit unit. Software
is provided, as are drivers and examples for a variety of programming
languages, including Visual Basic. Costs range from about $120 to
Of special interest to some will be the
Pico oscilloscope and
spectrum analyzer products. These interface to the PC using the
printer port, and provide high sample rates and both 8-bit and 12-bit