My name is Joe Bell. Photo

I'm not this Joe Bell. Or this one. Or this one.

I'm a student in the Harvard MD-PhD program. Until recently, I worked in the lab of Rachel Wilson, in the Department of Neurobiology. I worked on the neural coding of odors, the structure of chemotactic behavior, and hearing biomechanics. These days I'm a medical student.

If you're interested in this stuff, drop me a note: joe_bell@hms.harvard.edu



Some (open sourced) tools I've worked on:

Some of these are only a little better than half-baked; usable, but still under-done. Let me know if you have an opinion, or want to help. Also, if you find anything here useful, or do anything cool with it, I'd get a kick out of hearing about it.


Olfactometer Driver

A 4-channel MOSFET based switch for computer control of high-current devices (like solenoid valves in olfactometers) with logic level (5V) signals. Works with drive voltages of about 6 - 50V, currents up to several amps. Outputs are protected against shorts and failures. Takes BNC inputs, but also can be plugged directly onto an Arduino. Instructions, Eagle schematics, and Gerber CAM files on GitHub


LED Illumination Panel

3" square tile-able panels for LED illumination. Each panel houses 18 LEDs each of two different colors, with different colors independently switchable. Power and switch signals travel between boards on edge connectors for easy tiling. Use one channel to provide extremely even and stable IR illumination, the other for optogenetic stimuli. Instructions, Eagle schematics, and Gerber CAM files on GitHub


openMill openMill G1

A 3-axis CNC mill. All non-stock parts are laser cut from acrylic, and require only hand-tools for assembly. Total cost ~$500, precision better than .001". Especially good for rapid PCB prototyping. Instructions, part lists, and CAD files for custom parts hosted at Instructables.



diyPCB Laser cutting double-sided circuit boards

A detailed protocol for combining a CNC laser cutter with copper chloride etching to produce high-res double-sided PCB prototypes, including laser cut through-holes. Trace/space of 8/8 mils, boards in 2 hours, start to finish. Tools and tricks for double-sided board alignment, hosted at Instructables.



jDAQmx jDAQmx

A cross-platform MATLAB package interface for the DAQmx drivers. Replicates the function of the Data Acquisition Toolbox on Linux. Includes detailed instructions for installing DAQmx under Scientfic Linux v6.4. GitHub



dataCzar dataCzar

A lightweight MATLAB package of tools for managing scientific data. Manages filename generation to prevent over-writing, manages data backup (using rsync), and generates a codeStamp for data from the current git repository hash. GitHub



figFormat formFig

MATLAB package for easy generation, modification, and WYSIWYG printing of multi-panel figures. Allows creation and population of figure templates. Especially useful for rendering plots of figures that were generated on headless systems. GitHub



modelNeuron STDP simulation for 1st year neuroscience graduate students

A MATLAB simulation package for teaching students about computational modelling and STDP. This reimplements the model described in (Song, Miller, and Abbott, 2000) (Developed for Harvard's course NB204: Neurophysiology of Central Circuits, with A. Baker) GitHub



Music:

... from ages ago, with Invisible Downtown
Album Art The Safest Place, 2002 Album Art The 8th Grade Talent Show, 2005