Week10

group assignment: • measure the power consumption of an output device

Measuring OLED power

V=IR We first measured the OLED to see how it behave in an oscoliscope. i Used a 10ohms reitr conenctedin series and then measured it using the two oscilsope probes, signal connected to end of resitor and the gorund connected to the other end of restr clsoe to OLED.

Term Meaning • Vpp Total voltage swing • Vavg Average voltage • Frequency How fast signal repeats • Duty cycle % time signal is ON • VLo Lowest voltage

Am getting:

Vpp (Peak-to-Peak Voltage) This is the difference between the highest and the lowest voltage The vpp is flactuating due to the 10ohm resistor, 1ohm should be used.

Power To get, power I mesured the voltage across the 10ohms resitor conencted in series wiht the oled.

Current= 3.16/10

I=0.316A

Power= VXI Power = 3.16v X 0.316A Power = 0.99856W

Conclusion Since i connected Oled 3.3v, It drew too much power hence too much current flactuation.