Run a quick test using a 10k reference resistor at 1 kHz. Measure the raw amplitude. If the ADC maxes out, switch to a higher reference resistor (100k). If the signal is too low (<10% of ADC range), switch to a lower reference (1k).
The CorrectionFactor accounts for the gain of your op-amps and the ADC reference voltage (usually 3.3V). Create A Low-Cost- High-Accuracy LCR Meter With An STM32 MCU
Multimeters measure resistance by injecting a DC current. LCR meters cannot use DC because capacitors block DC (infinite resistance) and inductors short DC (zero resistance). We need AC impedance . Run a quick test using a 10k reference resistor at 1 kHz
While original project files like schematics and source code are sometimes withheld by creators in early stages, community documentation on platforms like Hackster.io and Hackaday provides the theoretical foundation and block diagrams needed to recreate these tools. If the signal is too low (<10% of
To solve this, we perform (Discrete Fourier Transform) on the sampled voltage and current signals to extract the real (in-phase) and imaginary (quadrature) components.
// Multiply sampled voltage by sine/cosine and accumulate sumReal_V += v1[n] * cos_w; sumImag_V += v1[n] * sin_w;