16 CHANNEL BRAIN TISSUE STIMULATOR-BIOMEDICAL PROJECTS

[caption id="" align="aligncenter" width="300" caption="Image via Wikipedia"][/caption]

SUMMARY OF PROJECT

The pathways of brain circuitry can be studied by delivering current impulses to
brain tissue and observing the tissue response.  The goal of this project is To
develop a current source to be used for in vitro stimulation of rodent neural
tissue. The current source must deliver independently controlled currents to 16
separate electrodes on a 16 microelectrode array.  In addition, the currents must
be controllable via TTL computer logic and have a short response time to the
initial signal.  The design described in this report uses a transformer to supply a
large isolated voltage to 16 circuits which will convert the voltage to an
appropriate current.  The current on each channel will be controlled by a
potentiometer which varies the magnitude of the impulse received from a TTL
computer signal.  When the computer program supplies an impulse, a
corresponding square wave current pulse will be applied to the tissue.

DOWNLOAD THE PROJECT FROM HERE

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