Baby Mobile Controller

This device is a musical mobile that is suspended over a table where an infant subject lies on it's back. A plastic target equipped with a micro-switch trigger is placed above the infant's feet. When the target is kicked, the mobile is activated for a short period. This design was for an experiment in infant learning conducted by Dr. Linda Fetters and her group in the Sargent College.

[Engineering Technical Documentation]

Baby Mobile Controller 2

Baby Mobile Controller 1

Biological Compound Sensor

This device will use a proprietary sensor chip to measure the concentrations of various biological compounds in an aqueous solution.

The basic requirements are:

* Control 2 bias voltages (V1 and V2) for the sensor
* Superimpose a small AC signal (10mV) at a frequency variable from 2-100 Hz on V1
* Measure the AC current through the sensor as a function of the applied AC signal (dynamic resistance).
* Collect a family of curves by varying V1 and V2 for known concentrations of a test compound for calibration
* Finally, measure dynamic resistance at fixed V1, V2 for unknown compound concentrations and report the measured concentration.

[Engineering Technical Documentation]

Biosensor Electronics Enclosure 3



Biosensor Electronics Enclosure 1

Biosensor Electronics Enclosure 2

Biosensor Electronics Enclosure 4

NASA Radiometer Upgrade

The EDF upgraded three Mark-2 4 band Radiometers originally developed by NASA’s Jet Propulsion Laboratory in the 1980s. The manual states, "The device was designed to support thematic mapper ground-truth data collection efforts and to facilitate in situ ground-based remote sensing studies of natural materials".

Radiometer 3Radiometer 3

The EDF replaced one of the channels with a blue spectral band, designed a tripod and filter mount, recalibrated the units, as well as completing some extensive maintenance.

 Professor Alan Strahler at Boston University is now using the radiometers for CAS GE 502 Advanced Topics in Remote Sensing.  The device is used in to compare the reflection spectrum observed at ground level with that seen in satellite photos.

[Engineering Technical Documentation]

Radiometer 1

Radiometer 2

Radiometer 3

Radiometer 4

Radiometer 5

Radiometer 6

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.

[View Engineering Project Documentation]

Cell Stretcher Controller 1

Cell Stretcher Controller 2

Cell Stretcher Controller 3

JTAG Test Hardware

JTAG test hardware developed in the EDF.

[Engineering Technical Documentation]

No images for this project

ASD Chip Development

No images for this project

LVDS Driver Rad Testing

The EDF developed a LVDS driver radiation test setup for remote DAQ at the MGH cyclotron.

[Engineering Technical Documentation]

No images for this project

ATM Ethernet Daughterboard

The Super-Kamiokande experiment is a large underground neutrino detector in Japan. 15,000 photomultiplier tubes are mounted in a large tank of water in an underground mine. The tubes measure tiny flashes of Cherenkov light given off by the passage of sub-atomic particles including muons and neutrinos.

The EDF built about 500 Ethernet readout cards which are used to transmit data from the detector to a bank of computers which identify interesting events for further analysis.

[Engineering Technical Documentation]

ATM Ethercard 1

ATM Ethercard 2

ATM Board