Summary of PIC16F84 2.7GHZ FREQUENCY METER CIRCUIT 100KHZ RESOLUTION PICBASIC PRO
This article describes a compact frequency meter using the PIC16F84 microcontroller, capable of measuring signals up to 2.7 GHz by integrating an LMX5080 prescaler. The device utilizes an AN592 application note design and features a dual-line LCD for displaying raw and multiplied frequency values. Written in PIC BASIC PRO with assembler support, the project offers downloadable schematics and source code for customization, targeting applications like ATV where high precision is not critical.
Parts used in the Frequency Meter PIC16F84:
- PIC16F84 microcontroller
- LMX5080 prescaler
- LCD display (2 lines of 16 characters)
- 2N2369 transistor
- 560 Ohms resistor
- 39K collector resistor
- 470 Ohms inlet resistance
Frequency meter PIC16F84 with prescaler This small unpretentious frequency is for SHF measures up to 2.7 GHz for which we do not look great precision (eg ATV). Like many circuits of this kind, it is based on the AN592… Electronics Projects, PIC16F84 2.7GHz Frequency Meter Circuit 100kHz resolution Picbasic Pro “microchip projects, microcontroller projects, pic16f84 projects, picbasic pro examples,
Frequency meter PIC16F84 with prescaler This small unpretentious frequency is for SHF measures up to 2.7 GHz for which we do not look great precision (eg ATV). Like many circuits of this kind, it is based on the AN592 Application note Microchip.
This is actually a frequency that can operate up to 13 MHz which I added a prescaler LMX5080 by 256. This circuit is no longer manufactured, but it can be replaced by any available prescaler (the value of prescaler is selectable by software).
The LCD display 2 lines of 16 characters, indicates the frequency measured by the frequency on the first line and multiplied by 256 (or whatever) to the second value. The scheme is available at ISIS screen or JPEG format . You can download the printed size ARES system . The app is written in PIC BASIC PRO with some assembler. The source code is available here . It is widely commented and everyone can adapt to their needs.
PIC16F84 FREQUENCY METER
The amplifier comprises a common emitter 2N2369 (grounded), 560 Ohms resistor (connected to +5 volts) and the collector resistor 39K between collector and base. Input from the base via a capacity, exit to the header to the resistance Inlet of the frequency (470 Ohms -> RA4).
Source: f6csx.free.fr PIC16F84 2.7GHz Frequency Meter Circuit 100kHz resolution Picbasic Pro source code schematic etc. files:
FILE DOWNLOAD LINK LIST (in TXT format): LINKS-4446.zip
Source: PIC16F84 2.7GHZ FREQUENCY METER CIRCUIT 100KHZ RESOLUTION PICBASIC PRO
- What is the maximum measurement frequency of this circuit?
The circuit can measure frequencies up to 2.7 GHz when using the prescaler. - Can the LMX5080 prescaler be replaced?
Yes, it can be replaced by any available prescaler since its value is selectable by software. - How does the LCD display present the measured data?
The first line shows the measured frequency while the second line displays the value multiplied by 256 or another selected factor. - What programming languages were used to write the application?
The application was written in PIC BASIC PRO with some assembler code included. - Is high precision required for this frequency meter?
No, this small unpretentious frequency meter is designed for applications like ATV where great precision is not looked for. - Where can I find the schematic and source code files?
The scheme is available at ISIS screen or JPEG format, and files including source code are available for download in a ZIP file.
