Gwynneth Davidoff, Kendall Pletcher, Mary Schmidt, Amy Whitcombe

Progress  GUI/PIC interface: Successfully connected DC-DC voltage inputs (0-5V) work ASCII file loading sort of works ○ Now: takes file with time, relative measurement from 0-1; user specifies high and low voltage output ○ Issue: speed of updating measurements – specified pulses 10 ms, getting changes of ~13 ms Reading voltages for housekeeping works, need to test with current sensors PWM control doesn’t work  Adjustments Changed 4.096V reference to 5V reference so that DAC/ADC can output/read up to 5V

Working temp. measurements (current not connected) Room temperaturePerson touching sensor

Next steps  Find out PWM issues  Characterize time lag between computer sending signal and DAC output  Circuit for adjusting 0-5V output of DAC to ~ V range for UV LED  Design circuit/system such that PWM and DAC output for LED are connected in series  Get GUI to update continuously

PERT Chart  This week Finalizing GUI/PIC code Interfacing GUI and PIC Testing connections, debugging  Next week PCB layout, components box design Testing with MXS Solidify what changes we want to make for a second iteration of the project