To the interested reader

UPDATE 24 OCTOBER 2003
The password is now in EEDATA rather than program memory to facilitate easy changes.
It is located in 2A, 2B, 2C for password1, password2, password3 respectively.

UPDATE 23 OCTOBER 2003
The .BAS .HEX and .EEP files were updated to allow a simple reprogram of polarity for the controller inputs.
It is still necessary to solder the pullup/pulldown resistors R21, R22 to either +5V for active low operation or to GND for active high operation (see documentation). The software response may now be changed by altering the value of a byte in the EEDATA. The address of the byte is at HEX 2D. Use the following values for the desired polarity.
0= both mutes active low
1= repeater mute active high, simplex mute active low
2= repeater mute active low, simplex mute active high
3= both mutes active high

A further software modification was made to ensure that the repeater mute always received priority.

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The zip file contains a complete package for the production of the VK5DJ Repeater Controller.

The files are:
EEDATA.eep		{is the EEDATA file to be loaded into the programmer}

Repeat~1.hex		{is the data file for the programmer}	

Repeater with gateway.bas	{is the basic source code for the controller}

Circuit.pdf		{obviously the circuit of the device}

Component layer.pdf 	{shows component layout}

PartsOverlay.pdf 	{a colour print of the parts overlay and the circuit traces}

Populated Board.jpg 	{a picture of the completed board with parts minus PIC}

Repeater controller parts list {the parts list as .DOC}

RepeaterPCB.pdf 	{the PCB patterns for the production of boards. Note size is given in thousandths of an inch}

The VK5DJ Repeater Controller.doc {AR article in word format}

Hardware Programmers for the PIC can be purchased from Oatley electronics. I use the software program PICALLW which is free if you just want to program 16F84s. A search on the internet will sort this out. 


Best wishes
John Drew
VK5DJ
October 2003