Cheap, Small TNC?
I was working on designing a surface mount PC board to build up a
bunch of Bob Ball's nifty $25 PIC-based TNCs together so every RACES radio would have one built-in. . . and then read the source code and discovered it doesn't do AX.25 connected mode! Any suggestions for a TNC that: - Is cheap enough I can afford to give away 20 of them, - Is small enough to install inside a mobile radio, - Is AX.25 connected mode capable, - Is NOT KISS or APRS (UI) specific, - Is NOT dependant on ANY PC interaction or support, - Will digipeat. So far I can't find anything that meets all those requirements. We are currently using a limited number of Alinco internal TNCs but they are expensive, don't digi and only work with Alinco radios. And - NO - I'm NOT looking for a different way to do what I need to do: it's Plain Old AX.25 connected mode; NOTHING ELSE! Thanks in advance, Bill - WB1GOT |
Cheap, Small TNC?
"Bill Powell" wrote in message
... I was working on designing a surface mount PC board to build up a bunch of Bob Ball's nifty $25 PIC-based TNCs together so every RACES radio would have one built-in. . . and then read the source code and discovered it doesn't do AX.25 connected mode! Any suggestions for a TNC that: - Is cheap enough I can afford to give away 20 of them, - Is small enough to install inside a mobile radio, - Is AX.25 connected mode capable, - Is NOT KISS or APRS (UI) specific, - Is NOT dependant on ANY PC interaction or support, - Will digipeat. Bill - The NO KISS specification I think eliminates the John Hansen products ? He now lists these under the name Coastal ChipWorks - TNC X solution http://www.tnc-x.com/ You can also ask John of his thoughts (his designs are also PIC based) His TNC-X boards are expandable via an expansion header that allows the addition of "daughter boards". w9gb |
Cheap, Small TNC?
"g. beat " @spam protected wrote in message
. .. "Bill Powell" wrote in message ... I was working on designing a surface mount PC board to build up a bunch of Bob Ball's nifty $25 PIC-based TNCs together so every RACES radio would have one built-in. . . and then read the source code and discovered it doesn't do AX.25 connected mode! Any suggestions for a TNC that: - Is cheap enough I can afford to give away 20 of them, - Is small enough to install inside a mobile radio, - Is AX.25 connected mode capable, - Is NOT KISS or APRS (UI) specific, - Is NOT dependant on ANY PC interaction or support, - Will digipeat. Bill - The NO KISS specification I think eliminates the John Hansen products ? From a practical standpoint, I can't see much difference, unless OP has some specific software beyond the typical terminal emulator. The TNC-X works quite nicely from a laptop and a mobile (haven't tried it with a hand held). And consume little power. However, they don't digipeat without the addition of a daughter card, and that would drive the price up, maybe too high ... |
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