Electronics Projects, Audio Signal Measurement Digital Millivolts Meter Circuit PIC16F88 article
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Millivolts meter circuit PIC16F88 based on 2 × 16 LCD display there mV, DBV, dBm signal levels can show audio signal input section ad623 and ad8307 used 12-15volt DC adapter operated on supply input LM317 regulated with built pic software assembly prepared by the asm hex placement There are plans pcb files
Input Impedance: 100kω (up to 600Ω balanced input) changed Frequency Measuring Range: 5Hz to 100kHz below, so above Maximum Signal Input Level: 1.4V RMS (DBV 3.0, 5.2 dbm/600ω)
At least Signal Input Level: 160μv RMS (-76dbv, -73.8dbm/600ω) Measuring Linearity: ± 0.3dB about Measurement Accuracy: ± 3% to about Power requirements: 12-15V DC <200 mA with LCD
PIC16F88 Millivolts Meter Project
Versatile display of signal level in mV, dBv & dbm Want to measure small signals at audio frequencies Here is a low-cost digital audio millivoltmeter, which allows you to audio signals for the measurement of below 5 Hz to 100 kHz. Besides the indication of the height in millivolts and dBV, it also shows the corresponding level dBm into 600 ohms.
Audio Signal Measurement Digital Millivolts Meter Circuit PIC16F88 schematic pcb an soruce code files alternative link audio-signal-measurement-digital-millivolts-meter-circuit-pic16f88.rar alternative link2 alternative link3