Re: bitx40 displays version, hums, but does not receive #bitx40help #bitx40 #radiuno
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One comment in this user's comment makes me remember something
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that no doubt others know but it may still be useful for someone who has not heard it before. Some people pick up a wall wart and see something like 12V 2A printed on and think this is suitable for general use. Unless it's a newer version of the device that is not depending on a transformer and rectifier to give the 12V 2A and is of solid state design where the voltage is pretty much on target for the 12V, an old transformer type with rectifier will deliver the 12V at 2A but if you hook it up to a device only pulling a fraction of that current, 1/2-A for example, the voltage may be up to something like 18V. In other words, a simple wall wart device delivers that voltage at that current but if the load is decreased, the voltage climbs and could be much hither than the device needing a power supply can survive. Ideally, all our electronic devices will avoid wall warts and a fully regulated power supply, voltage-wise, should be a minimum requirement. Using a wall wart for anything is inviting a castrophe. By the way, built my UBITX and love it. Still have to get a microphone because I think I got the eletret element too hot. But as a receiver, I am fully satisfied. Reminds me a little of the IC-718 as regards the menus but the UBITX is much, much simpler and no menu list need be carried to the field when using it. Bob ¡ª KK5R nocrud222 at yh dot com -------------------------------------------- On Sun, 12/16/18, Christopher M. Hobbs <cmhobbs@...> wrote:
Subject: Re: [BITX20] bitx40 displays version, hums, but does not receive #bitx40help #bitx40 #radiuno To: [email protected] Date: Sunday, December 16, 2018, 8:13 PM When I connect a serial monitor to the arduino, I don't get any data out of it.?? I've also tried to hook the arduino back up to my computer to burn the new v1.28.1 code to it and I have the exact same problem I had with the previous arduino that shipped with the kit (that formerly worked) when I try to upload the sketch: avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x00 avrdude: stk500_recv(): programmer is not responding ... avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x00 Problem uploading to board.? See for suggestions. This was happening when I realized the last board was toast and I fear this one is as well.? It is *not* a connection issue between my computer and the board.? I successfully programmed this board twice before.? My guess is last time I hooked the radio up, when I thought the board was dead, it was a matter of adjusting the contrast.? I bet the last board was stuck displaying the Raduino version as well as it's making the same humming noise it made previously when the other board failed. At this point I think that something must be shorted somewhere or maybe my power isn't clean.? This new board is exhibiting the same behaviour as the other board when it failed.? I'll shelve the project for now.? I'm not sure i have the patience or equipment to figure out what's killing these arduinos. Thanks to all for your help! 73 DE KD5RYO |
Bob Lunsford