LCD PIC18F4550 HF SWR Meter/Bridge:: Dual Channel LCD SWR Meter SWM3 By Tony/I2TZK, Frank/k7sfn, Dinesh/VU2FD

Amateur Radio Frequency Measurements:

0-30MHZ RF Power Measurement:

Dual Channel LCD SWR Meter SWM3 USB

SWM3-0915: 2X16 LCD Version

Project by: Tony/I2TZK, Frank/K7SFN , Dinesh/VU2FD

SWM3 is also available with a TFT Touch Screen Display...

SWM3-QRP: 10W 2x16LCD SWR METER WITH BUILT-IN HF BRIDGE IS HERE........

PCB Revised to Version 1018 (Accepts both TFT & 2x16LCD)

SWM3-0915 is an USB / DC12V Powered SWR Meter. Project is Based on Microchip's PIC18F4550.

SWM3-0915 is redesigned (from last version) keeping in mind existing HF and VHF Bridges and popular demand of Radio Amateurs looking for simple SWR measurement for their station Radios.

Firmware and PC Software (WinXP/WIN7) for SWM3 is developed by Tony / I2TZK and offered free of change for the Amateur Radio Community.

Purpose of this project is to encourage radio amateurs to build their own SWR Meter at a low price. Keeping this in mind, we have avoided use of SMT parts.

SWM3-0915 has following design task:

Simple single Micro Controller with built-in A/D converter (PIC18F4550)

Supports: HF Dual Scale, HF Balanced HFB3, HF Balanced 2KW Bridge HFB5 etc

CPU Unit:


	2 Channels: Can connect to Bridges at same time

	2 x 16 LCD with Back light control

	Stable Reference voltage.

	D9 Connectors for Bridge

	SWR, FWD, POWER and Actual Power to antenna calculations/Display.

	Bargraph mode for SWR & Forward Power

	Configure the computational parameters of the LCD Unit (CPU)

	Collect data for statistical analysis

	Works without a PC as a Stand alone with external 5V supply from USB port or DC12V adapter.

PC Software & Data-logger views:

Software V2.05 (WinXP/WIN7)

Click to enlarge

Project Bases:

Project is developed on two double-sided PTH board. The first one is CPU board where LCD, Regulator and Back Light Controllers are located. This board receives pure DC level from sensor (Bridge) board for calculation & display. A good quality D9 cable will make difference.

This kit is intended for experienced Radio Amateurs.

SWM3 is 100W / 1KW HF/VHF SWR Meter. Dual scaling (measuring 100w and 1KW on same channel) is possible when used with dual scale HF Bridge. Readings were very accurate compared to commercial SWR Meter.

A simple powder coated case for SWM3 and bridges are available and offered free of charge with kit or assembled.

SWM3 is also available as "Assembled" at the price of a kit to Senior Radio Amateurs.

SWM3-0915 Dual Ch LCD SWR/Power Meter CPU Unit: