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Data Logging / Acquisition
Circuits
AUDIO FREQUENCY DIGITAL
NOISE GENERATOR
When you need to test an audio circuit with broadband noise, this circuit works
great. It uses just three inexpensive C-MOS ICs that generate a series of output
pulses whose widths vary randomly. I included a level control pot.
C-MOS INVERTER MAKES
LOW POWER AMP
With the addition of one resistor and a capacitor, some common logic ICs can be
transformed from digital to analog duties. This circuit outlines some the
features to expect from different inverter ICs.
CIRCUIT FORMS DIVIDE BY 1.5
COUNTER
Two inexpensive ICs divide a TTL clock signal by 1.5. By following the circuit with
another flip/flop, you could also generate a divide by three function.
DVD Recorder + TV
Camera Make Cheap Data Logger
Sometimes recording the results of a test requires as much ingenuity as designing the
product. Consider a situation which requires the collection of many different
variables over a long period of time. Perhaps you are conducting temperature cycle
tests on an electronic circuit and you want to know what changes occur in circuit
performance over a 24 hour period. You could stay up all night and collect the data
yourself....
