Summary of AUDIO SIGNAL MEASUREMENT DIGITAL MILLIVOLTS METER CIRCUIT PIC16F88
This article describes a digital millivolts meter project based on the PIC16F88 microcontroller with a 2x16 LCD display. It measures audio signal levels in millivolts (mV), dBV, and dBm over a frequency range of 5 Hz to 100 kHz, using input components AD623 and AD8307. The device operates on a 12-15V DC supply regulated by an LM317, with measurement accuracy of ±3% and input impedance of 100kΩ. It is suitable for low-level audio signal measurement and includes PCB files and assembly code for implementation.
Parts used in the PIC16F88 Millivolts Meter Project:
- PIC16F88 Microcontroller
- 2 × 16 LCD Display
- AD623 Instrumentation Amplifier
- AD8307 Logarithmic Detector
- LM317 Voltage Regulator
- 12-15V DC Power Adapter
- Resistors and Capacitors (for filtering and biasing)
- PCB board (custom designed)
- Assembly language software (hex file)
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… Electronics Projects, Audio Signal Measurement Digital Millivolts Meter Circuit PIC16F88 “microchip projects, microcontroller projects, pic16f88 projects,
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.
Source: http://www.siliconchip.com.au/cms/A_111191/article.html
Audio Signal Measurement Digital Millivolts Meter Circuit PIC16F88 schematic pcb an soruce code files alternative link
FILE DOWNLOAD LINK LIST (in TXT format): LINKS-7000.zip
Source: AUDIO SIGNAL MEASUREMENT DIGITAL MILLIVOLTS METER CIRCUIT PIC16F88
