A new data acquisition technique has been designed for measuring chaotic attractors in periodically driven systems. Analog output hardware generates a continuous periodic waveform used in the drive while analog input hardware digitizes one or more chaotic waveforms characterizing the system phase space variables. With both processes synchronized to a common clock, the construction of multiple Poincare sections is reduced to the simple process of redimensioning the chaotic waveforms and taking slices in one of the array indices. The implementation described here is applied to an electronic Duffing oscillator running at 1.6 kHz and provides quality Poincare sections in near real time. (C) 2004 American Association of Physics Teachers. [References: 8]
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