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I am looking for help installing firmware on my U3s. I am using Arduino IDE as the ISP. Also using Avrdudess. I had a hard time getting the libusb0.dll installed but now have it in the two windows folders per instructions, I now don't get an error starting Avrdudess any more, However, I do get this error massage from Avrdudess,,?

avrdude.exe: stk500_getsync() attempt 10 of 10: not in sync: resp=0x00
avrdude.exe done.? Thank you.

Now I am lost. Can anyone help me with this problem?? The U3s reboots every time it starts to transmit. I tried? a restore with the same results. Carl

Are you sure that your power supply is sufficiently robust? I had a similar problem with my u3s; changing the power supply fixed the problem. You might try putting a 4700uF cap across the power and see if it helps.

Roger
G3YTN


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Sent from my Android device with K-9 Mail. Please excuse my brevity.

Hello Carl.

Have you tried a reboot of your PC after installing the libusb.dll.

Also, are you selecting the arduino from the Avrdudess drop down menu.
I'm assuming that you have flashed the arduino isp sketch to the arduino.?
And are you selecting the correct com port to be used with the arduino as the programmer.
Can you see the arduino com port in your PC device manager.

I've always found zadig a useful tool to install peripherals like the arduino etc to the PC to be used with Avrdudess too.

Kind regards, James.

That's a good call Roger.

Dam it James, I think you hit it on the head. No I didn't flash the arduino. What a Dumass I am.I will do the arduino? and try it again. Some one smack me up side the head. I'll let you know. Carl

Before you flash the U3 did you check what Roger suggested.

Is the U3 working fine before transmitting?
Can you go through the menus etc..
Have you tried a different PSU.
What PSU are you using first.
Is it your first build of this kit kit.

Cheers James.

The first U3 I built years ago I seem to remember having a similar problem. I was using a very small phone charger I seem to remember which caused all sorts of problems.

Swapped it out with a linear PSU and never looked back.

Cheers. James.

Hay there James
Yes the U3s works fine up to the start of transmitting then reboots
Yes I can go through all the menus and set the correct info
Yes different power supply same results
Home made PSU running to 7805 5 volt regulator.
I have been into building and repairing radios for almost 55 years. I am 70 years old and got my first ham ticket in 1975.? I have built about 30 Heathkits including the complete SB-104A station.. Repaired Kenwood TS 820s, Icom 740 Many kits built by others. Lots of AA5 type radios etc. etc. So I can solder. This U3s was working well but the Atmal 328P became corrupt and factory reset did not solve the problem. That is why I am trying to flash the firmware.
Now my error reads,,,,
Reading | ################################################## | 100% 0.00s
avrdude.exe: Device signature = 0xffffff
avrdude.exe: Yikes!? Invalid device signature.
???????????? Double check connections and try again, or use -F to override
???????????? this check.
avrdude.exe done.? Thank you.

I don't understand where to use "-F" so I can't try that yet.
My wire connections are correct and the same as the arduino sketch list them. I know the 328P is corrupt because I tried a new chip from QRP labs. I have ordered a new chip but won't get it for a couple weeks. Any Ideas? Carl?? AB1ZI