Daqarta
Data AcQuisition And Real-Time Analysis
Scope - Spectrum - Spectrogram - Signal Generator
Software for Windows
Science with your Sound Card!
The following is from the Daqarta Help system:

Features:

Oscilloscope

Spectrum Analyzer

8-Channel
Signal Generator

(Absolutely FREE!)

Spectrogram

Pitch Tracker

Pitch-to-MIDI

DaqMusiq Generator
(Free Music... Forever!)

Engine Simulator

LCR Meter

Remote Operation

DC Measurements

True RMS Voltmeter

Sound Level Meter

Frequency Counter
    Period
    Event
    Spectral Event

    Temperature
    Pressure
    MHz Frequencies

Data Logger

Waveform Averager

Histogram

Post-Stimulus Time
Histogram (PSTH)

THD Meter

IMD Meter

Precision Phase Meter

Pulse Meter

Macro System

Multi-Trace Arrays

Trigger Controls

Auto-Calibration

Spectral Peak Track

Spectrum Limit Testing

Direct-to-Disk Recording

Accessibility

Applications:

Frequency response

Distortion measurement

Speech and music

Microphone calibration

Loudspeaker test

Auditory phenomena

Musical instrument tuning

Animal sound

Evoked potentials

Rotating machinery

Automotive

Product test

Contact us about
your application!

Board Selection

Cut a sheet of single-sided copper-clad circuit board to the proper dimensions, as needed. You can cut larger sheets with a hacksaw, or by scribing heavily on both sides and snapping, or with a heavy-duty industrial sheet-metal shear if you have access to one. Sheets in standard sizes like 4 x 6 inches are available from All Electronics, Jameco, or some Radio Shack stores.

The industry-standard board material is "1 oz. FR-4 Epoxy" or words to that effect. The "1 oz." refers to the weight of copper per square inch of board surface. Don't get 2 oz, since it takes just about forever to etch and is hard to solder because it is such a good heat sink.

The "FR-4" is the designation for the Fire Retardant standard, and "Epoxy" or "Epoxy-Glass", etc, indicates that the board itself is made from fiberglass mat laminated with epoxy resin. You might also find "Phenolic" instead of epoxy. This is OK for small low-voltage circuits, and is gentler on drill bits, but it is prone to warping... usually not an issue on small boards (a couple of inches on a side), especially with the direct-draw method.

The board thickness will typically be 1/16 inch (0.062), but ths is rarely critical for small projects.


See also Printed Circuit Construction

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