PQA measure voltage and current waveforms to determine whether they meet specifications. These devices use sensors to detect electrical disturbances such as spikes, sags, transients, harmonics, and noise. They also provide protection against equipment damage from surges, faults, and other electrical events.
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Multimeters&#; Multimeters are similar in appearance to an analog volt-ohm meter. They can measure AC or DC currents, voltages, resistance, capacitance, inductance, impedance, and many other parameters. A typical multimeter has three main functions:
Oscilloscopes- An oscilloscope is a type of digital display that shows waveforms on its screen. It consists of two parts: a probe and a computer. An oscilloscope works by measuring the time it takes for a signal to travel from one point to another. This gives you information about the shape of the waveform as well as how fast it changes over time.
Spectrum Analyzers- A spectrum analyzer is a special type of oscilloscope that displays the amplitude of a signal at different frequencies. You use a spectrum analyzer to analyze signals such as radio waves, microwaves, radar, television, audio, etc. By analyzing these signals, you can see what kind of interference they contain.
Digital Signal Processors- A DSP is a specialized processor designed specifically for processing digital data. A DSP can perform complex mathematical operations much faster than a general-purpose microprocessor. For example, a DSP could calculate the square root of a number using fewer steps than would be required with a regular CPU.
I chose to use a pcb prototype board to solder the electrical components on, in order to have a compact circuit and to eliminate the risk of components coming loose.
The components are not soldered directly to the pcb, because I want to be able to easily mount/demount them, so I used female pin header connectors.
Connections Nokia display to Arduino:
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SCLK -> D11
DN or DIN -> D10
D/C -> D9
RST -> D8
SCE or CS -> D7
The voltage and current sensors are connected to A0 and respectively A1 analog pins of the arduino board.
Connect the power pins of the sensors to the arduino power pins.
You will need to cut the usb cable and solder the black wire to the GND pin, and RED wire to the 5V pin on the arduino. This way the circuit can be powered from the mains, through a charger.
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