Hi All
I am totally new to all this so please give me a chance. In the past the most complicated thing I have had to deal with was Dolby Cinema sound processors and old valve cinema amps so PIC and programming is all new.
As I am now disabled I needed to find new hobby's and reinvent old ones so 6 months ago I started with electronics and PIC's. Having used the 16F877A for my midi organ I looked for an alarm using the same pic as I still had 5 left. when I found the John Becker one it was perfect. I know that this has been talk about back in 2008 but none of that has helped me so far. I built it up on the bread board, downloaded the program but no matter what I do I can not get it to work. I am using PikLab, picprog2009, the Velleman 8048. I have downloaded 3 asm file and the Hex file from EPE. I programmed the Hex file then read the pic and the Hex file from the pic is identical to the original. I have replaced the pic and the LCD but all I get is a blank LCD. I have tried other programs to check the pic and LCD and they worked fine.
I have added transistors and led's to the programmer board to monitor the data, clock and reset to the pic and it all looks fine.
I have one concerns, one, the crystal I am using is a 4Mhz and not the 3.286 as in the diagram.
Could this be the crystal or am I doing something totally stupid?
This alarm is perfect for my needs as I have 2 sheds and a workshop plus it has the panic button for when I fall.
Any help would be very much appreciated.
Steve
I am totally new to all this so please give me a chance. In the past the most complicated thing I have had to deal with was Dolby Cinema sound processors and old valve cinema amps so PIC and programming is all new.
As I am now disabled I needed to find new hobby's and reinvent old ones so 6 months ago I started with electronics and PIC's. Having used the 16F877A for my midi organ I looked for an alarm using the same pic as I still had 5 left. when I found the John Becker one it was perfect. I know that this has been talk about back in 2008 but none of that has helped me so far. I built it up on the bread board, downloaded the program but no matter what I do I can not get it to work. I am using PikLab, picprog2009, the Velleman 8048. I have downloaded 3 asm file and the Hex file from EPE. I programmed the Hex file then read the pic and the Hex file from the pic is identical to the original. I have replaced the pic and the LCD but all I get is a blank LCD. I have tried other programs to check the pic and LCD and they worked fine.
I have added transistors and led's to the programmer board to monitor the data, clock and reset to the pic and it all looks fine.
I have one concerns, one, the crystal I am using is a 4Mhz and not the 3.286 as in the diagram.
Could this be the crystal or am I doing something totally stupid?
This alarm is perfect for my needs as I have 2 sheds and a workshop plus it has the panic button for when I fall.
Any help would be very much appreciated.
Steve