1. Project 3: Development of Wireless Gas Detectors REU Student: Jose Vigil Graduate mentors: Chris Hughes, Xiaochen Wang Faculty Mentor(s): Dr. Hyoung Jin Cho
Week 4 (June 13 –June 17, 2016)
Accomplishments:
-Finished Installing software.
-Wrote code for both meters.
-Got the Voltage meter working.
-Also made a Amp meter with the Volt meter.
Issues/problems encountered and solutions (if any):
-The sensor does not read accurately a small current.
-Need to be able to measure Micro Amps . (Only 6 decimal places and micro amps start at digit 6)
-A Current amplifier (OP AMP) for possible solution.
Another Solution?: By increasing the Resistor value, the current becomes smaller. Easier to read by sensor.

2. TESTING
1.5V AA Battery
Voltage Meter reading: " , , “
9V Battery (Actually 3V)
Voltage Meter Reading: “ , , , …”
1.5V Battery--- 10Ω Resistor
By Ohm’s Law expected Current 0.15 Amps
Actual Reading: “ , , , …….”
1.5V---1MΩ Resistor
Expected Current Amps (~1.58 micro Amps)
Actual Reading (“ , , …)(~2 micro Amps)
3V(3.11 Volts at the time of test) Battery--- 10Ω Resistor
Expected Current Amps
Actual Reading: “ , , , 0. …….”
3V Battery – 1MΩ Resistor
Expected Current Amps
Actual Reading “ , , , ….”(~3 microamps)

3. Next Week: -Try to solve the amplification problem of Micro Amps.
-Figure out which resistor to use in the circuit for better accuracy.