www.shaneburrell.com BLOG Search – Rescue – Scuba – Diving – Telecom – Electronics – HAM Radio

27Jul/100

AVR – CTCSS 2 Tone and APRS AX.25 project.

Brother Toner Transfer to PCB working!!!

AX.25 encode is complete and seems to work well.  AX.25 decode works, but I have a special mode and also have a CTCSS listen setup to remotely turn on that mode.  Still some items to do , but its almost time to put this on a board.  If you are interested in this project please let me know.  I was able to get my Brother Laser printer to work with the toner transfer method after some trial and error.  I had great results using a Brother HL-4070CDW and Kodak inkjet photo paper using a iron and being very patient with the soak.

25Jul/102

AVR CTCSS Tones and 2 Tone Paging.

I have several radios that don't have CTCSS or the ability to page out fire tones.  I figured I'd solve it with a programmable AVR.  I started with a basic Arduino board and progressed to c code to control various circuits for the generation and detection of tones.  I'll be posting some pics and information soon.

AVR Radio Controller TNC CTCSS PL TWO TONE