Cell Stretcher Controller

This device is used to controller stretching of heart tissue on a custom-made apparatus. The original device used a variable-speed motor with a timer, and could operate at a fixed speed for a fixed period of time. The new micro-controller based device built in the EDF allows programmable time in the stretched and relaxed positions up to 99 minutes in 0.1 second intervals. A commercial micro-controller module was used. We packaged it in a transparent box for water resistance and durability, and wrote custom control software in C.

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Cell Stretcher Controller 1

Cell Stretcher Controller 2

Cell Stretcher Controller 3

Frog Shaker

Frog Shaker for K. Warkentin.

[Engineering Technical Documentation]

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Biological Signal Delay Generator

This circuit is designed to synchronize a CCD camera with a particular phase of a periodic
biological signal (i.e. electrocardiogram or respiration transducer). The CCD shutter will be
activated at a fixed fraction of the measured period of the period of the input signal.

[Engineering Technical Documentation]