Dr. Timothy Renfro

Current Projects   

Digital Conversion of a Varian-Cary 210 UV-Vis Absorbtion Spectrometer

By Aurthor Ross

The goal of this senior project convert the analog controls on a Cary 210 UV-Vis Absorbtion Spectronometer to digital control and data aquistion.  Currently the computer control for the device is for an Apple 2E machine and the only output is to an analog paper charter.  This makes the equipment difficult to use with modern techniques of examining and manipulating data with the use of a PC.  Items to be purchased are a stepper motor drive card if the current curcuit can not be salvage, and a data aquistion card (dac).  The second part of the project will involve writing a LabVIEW program that will automate the experiment and bring it under control of a PC.

Past Projects

Wind Tunnel

By Austin Wegner

When living in Abilene, Texas, what better to do than study the wind?  There is plenty of it and with the ever looming crises of developing clean energy, Austin has decided to build a wind tunnel.  Preliminary designs put the test section at 0.5x0.5x1.0 meters and Austin hit it almost on the nose.  Maximum measured windspeed was just about 6 mph.  Total, the wind tunnel is 8 feet in length and can barely fit through a standard door.  With the limited space in the science building, this turned out to be an interesting challenge.


         Austin Wegner in front of the wind tunnel.  Condinsation used to show air passing over a tennis ball.

Unmanned Aerial Vehicle

By Aaron Ward

With his interest in atmospheric science, Aaron decided to explore the physics of flight by designing a small unmanned aerial vehicle.  To add to the challenge, he would place a small wireless camera on the UAV to take video as it flew.  The resulting flight made about 2 loops around the field before a control surface broke free and the UAV had to be landed.  Aaron learned valuable leasons in loading on structures as well as the basics of transmitting a wireless feed. 

Aaron Ward preparing to launch his UAV with pilot at the ready.  Off it went into the wild blue yonder.

Table Top Cyclotron

By Michael Herriage

One of the most challenging projects I personally have seen an undergraduate attempt in my career is the production of a table top cyclotron.  Given the size and energy restrictions of this device at such a small size, Michael will had quite a challenge producing high energy radiation.  Due to time restriction, the project was modified and a table top vacuum chamber was made.  Michael did complete most of the parts for the cyclotron.  A challenge indeed. 

Hydrogen Fuel Cell

By Tylar Murray

Winner of the 2010 Bloomer Award, Tylar constructed a working hydrogen fuel cell.  With a single cell, Tylar was capable of achieving nearly a volt.  Interestling, Tylar generated his hydrogen for the cell by electrolysis of an electrolite suspended in water.  Tylar also found out that the fuel cell could also be used to measure the saturation point of the mixture.

 PhD University of Texas at Dallas 2004
        3-5 Nitrides with interest in optical properties of Donor Acceptor Pairs orginating from strain.
MS Stephen F. Austin State University 2001
        Low temperature physics and automation experimental device capable of 2 Kelvin environment.
BS Tarleton State University 1997
Subpages (1): Biography