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 Amateur Radio RF Measurements:


 Project Infinity Graphical LCD/CPU


A Project by:

Tony / I2TZK, Frank / K7SFN , Dinesh / VU2FD


End of project:

Please visit New Graphic CPU project: GCPUx


Project "Infinity" Concept:

Project "INFINITY" Graphic CPU is developed keeping in mind the purpose that we use same CPU/LCD/Hardware for various Purposes or Projects.

Concept is very useful and money saving for most homebrewers as RF measurement is not  a daily requirement!!

With this, we build only one Graphic CPU and then add an add-on module, either analog or I2C type, load new firmware that Tony/I2TZK makes for Amateur Radio Community, and we are ready with new RF Test Equipment for our station. 

PC Software & PIC Firmware developed by Tony/I2TZK for Graphic CPU hardware are designed to achieve following tasks:  

Simple single Micro Controller with PIC18F4550
Graphic CPU is all that a Ham Station may invest in. Present and future Add-Ons will keep it expanded
Graphic CPU hardware details:
128 x 64 Graphic LCD with Back light control  
Stable Reference voltage.
D9 Connector for Analog and I2C Interface
LCD Backlight Control  
LCD Contrast Preset
DC12V (standalone) or USB Operation 
Expansion slot for relays and alarms (FRC16)
4 Analog and I2C for Project add-on (D9)
I2C and 8 Relay Outputs at FRC16 Extension
8 DIP Switches for CPU Config
Works with or without a PC.

Graphic CPU is also a powerful development board for those who wish to write their own PIC Firmware

Completed Graphic CPU-0613:  

Graphic CPU with SWM4 Firmware loaded

Click picture for larger view

Graphic CPU has One front panel push button, an encoder with push button and LCD backlight dimmer control. Also has FRC16 type expansion socket and 8 X DIP switches for CPU configuration.

Right hand side of the board has a D9F connector for add-on module interface and USB+DC12V sockets.

Projects listed below uses GCPU-0613 as a display:

 SWM4: Dual Channel SWR Meter with Graphic LCD

Click the image to visit SWM4 Webpage and Buy Kits

 PM4: Dual Channel 500MHZ RF Meter
Click the image to visit PM4 Webpage and buy kits


 AAZ-0713: Antenna Analyzer
Click the image to visit AAZ-0713 Webpage and buy kits
Click the image to visit related webpage
 Graphic CPU-0613: Project Info Documents


GCPU-0613 Tech Info Doc. 0-500MHZ RF Sensor Document
GCPU-0613 Schematic JPG
GCPU-0613 Schematic and Parts List 0-500MHZ RF Sensor Document



0-500MHZ RF Sensor Document

GCPU-0613 Troubleshoot

0-500MHZ RF Sensor Document

GCPU-0613 DIP SWITCH settings for Projects

0-500MHZ RF Sensor Document

 Graphic CPU Component Datasheets:
Encoder EC12 ALPS 0-500MHZ RF Sensor Document

74HC165 0-500MHZ RF Sensor Document
74HC595 0-500MHZ RF Sensor Document
128X64 JHD LCD 0-500MHZ RF Sensor Document
 Understanding GCPU-0613 usage:
GCPU-0613 Kit without any add-on module is available to developers who wish to design their own add-on and develop PIC firmware. 
An Expansion board with I2C Interface and 8 Relays is now available for Grpahic CPU
Normally, GCPU requires an add-on module to operate with a suitable PIC Firmware loaded into PIC18F4550. 

Firmware and PC Software (if developed) for GCPU are available on  add-on module Project web pages such as: PM4, SWM4, AAZ-0713

 Grpahic CPU Development Source Code
GCPU Source Code by Tony/I2TZK

GCPU Skaleton code
 GCPU hex for Antenna Analyzer


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