Troubleshooting Chance PI

[baum7154]

Here are what I hope are higher resolution photos of my Chance V1 board.

Dan

[6666]

They are much better pics, thanks.

[baum7154]

Yes for some reason I can't move pix from my library to an attachment and get acceptable resolution. I had to take these pix as a direct attachment and they were good. Thanks for noticing.

Regards,

Dan

[6666]

Yes for some reason I can't move pix from my library to an attachment and get acceptable resolution. I had to take these pix as a direct attachment and they were good. Thanks for noticing.

Regards,

Dan

They are now 2592 × 1936 pixels .

[baum7154]

Boris,
I would examine each component value and its proper orientation for diodes, transistors, electrolytic caps, ICs, and the switches. I would clean up any solder joints that are not smooth and shiny. I don't know if it would help if I posted closeup pictures of my working board component side and trace side for a little 'stare and compare' with yours. I'll try to get that done tomorrow.

Good luck,

Dan

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Boris,

Have you had any luck with your board comparisons to the pictures provided? Please let me know if you have any questions.

Dan

[dantech]

You do not need to use so big dumping resistor (I mean size). It is can be 0,125W (when original 390 ohm). There is no heat to fell over resistor because of very short pulses

[hecbom]

Hello Boris

I just ordered the Chance PI circuit board from Silverdog along with the pre-programmed Atmega microcontroller. I was following this thread because there has been several revisions to this MD and I want to make sure I order the correct components. My questions is, did you ever find out why your unit was not functioning? If you could post your results, it would be helpful to others.

Thanks in advance!

Hector

[Borisimo]

Update- No progress I'm afraid

Gentlemen,


I'm afraid I didn't get much further with this. I had a car problem and a sick mother problem (both of which are much better now).


Anyway, I will try to have another go once I get some time. If I get any results I will definitely post them on here. In the mean time I am trying to finish a Minipulse Plus project.


Dan, your coil advice came in handy as my 'prototype' basket coil is being used to test the MPP project. Did you find any gold with your Chance unit?


Hector, did you build the Chance PI successfully or run into any problems?


Cheers, Boris

[Virdi_248]

I think that already I have the programmed well chip. Now I want to verify the voltage in points of check. Can someone indicate me that points of the circuit to look? In the pin 15 of the screen come 11,7v and it does not seem to me to be normal. I am using this pcb.

It seems that there is an error in the pin + LED, this pin has to have 5v and however it reaches 11.7v, I think the screen can be damaged.

[dantech]

12V on pin 15 of LCD is right. That is backlight power line.

[Virdi_248]

I listened and everything works fine. Now the coil. Thank you