Simple Voltage and Current Measurement

Experiment I Simple Voltage and Current Measurement Target The purpose of this experiment was to measure voltage and current. After finishing this experiment, I was able to do the following. 1) Set the DC power supply to a specific voltage. 2) Connect the voltmeter correctly and measure the voltage. 3) Measure the current with an ammeter. 4) Measure the resistance with an ohmmeter. 5) Determine the accuracy of the given meter reading. Theory The theory necessary for this experiment is understanding of Ohm's law.

Sinusoidal voltage and current: (a) Once the current is established, the DC voltage and current are constant over time. (B) Voltage vs. current versus time plot of 60 Hz AC power supply. Voltage and current are sinusoidal, in phase with simple resistive circuit. The frequency of the AC power supply and the peak voltage are greatly different. Let's consider the perfect resistance that turns on 120 times per second and darkens when the current passes repeatedly through zero. (The flashing at 120 Hz is so fast that it can not be detected by the eye.) The fact that the light output fluctuates means that the power will fluctuate. Since the supplied power is P = IV, when using the above equations for I and V, the time dependence of the power is as follows.

Changes in Diode Voltage The pH ISFET sensor is biased with a constant current as a simple power supply, and the supply voltage varies with the threshold voltage and pH. The conductive circuit operates with DC voltage. It measures the resistance of the electrode pair as an inverse function of the conductivity of the solution. The built-in potentiostat circuit operates the O 2 sensor and the 10-bit DAC controls the working electrode potential w.r. The reference analog signal is ordered by the multiplexer before being digitized by the ADC. ASIC and sensors consume 3 mW. This corresponds to 7 mA. Control chip