Let's Make Robots!

PICAXE-08M Zapped?

I have a PICAXE-08M that I belive is zapped. Not sure how I would have killed it but the program editor will no longer download code to it. When I check the firmware, it see's that it is an 08M, etc. 1) Can I confirm the death of this chip for sure? 2) Is it possible to ressurect the chip?

Worth mentioning, we can eliminate the USB, program, or circuit being the point of failure since my 14M works just fine.

Thanks in advance.

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have you checked the battery, that could prevent it from getting proged

 

When I had the 08M working I did have it overclocked to 8mhz. Although the prog editor reads 4mhz, no go.

Update. After fidgeting with a hard reset, everything seems to be back to normal. It didn't work the first time I tried a hard reset, I had to do it a few times before the editor recognized and downloaded to the chip.

All good. Thanks for the help!

This happens to be frequently when I use breadboards or my own circuits. I have to hit F5 and then connect the batter or flip the switch to provide power. I don't use my picaxe project boards much so I'm not sure if it is a problem with picaxe or my circuit. Turning it on after pressing f5 usually works after a few tries.

Do you all run your PICAXE chips from AA batteries or do you all use a regulated power supply? I have tried using a 9vdc/400ma power supply with a 5vdc regulator, but I seem to get variable and inconsistent results.

Thoughts?

I've used 4 AAA cells (6v) unreged without issue on a couple of my paxes without issue so far. I've also run with a (7805)regulated 9v(energizer I think) cell without issue.

One thing I noted when looking at the image is that your serin isn't tied to a common ground. It's advisable to do so, as this can potentially cause inconsistant operation issues.

scratch that, didn't see the ground line at first...dang where are my glasses!

But have you used one in conjunction with a power adapter?

There was another thread when someone tried to run a picaxe using a wall adapter. The problem was it supplied too much voltage when there wasn't a load on it. I believe it fried something, but it wasn't a picaxe. It was a servo board or motor driver that was rated for 12volts, but without a load the adapter send 14 or 16.

Edit: Found the link http://letsmakerobots.com/node/2040

negative. I only use sources that I plan to use in a project which are mostly rechargable batteries. I do(okay it's really my dads) have a bench supply I think it's regulated to 5 volts or 9 volts, but I never tried it.
Why not prototype with the real thing? If it's going to use a 7.2 nimh, test with a 7.2 nimh.

Thats what I was saying. I mainly use 9.6v nimh rechargable cells or 9v(6xAA/AAA). Those are what I refer to as my sources.