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Old 03-14-2022, 08:30 AM   #121
badboydas
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Default Re: New tool to find short capacitors on motherboards : shorty with display

Anyone building Shorty should note that all MCP3421's are not equal, the SMD code dictates the address (which you would change in the code line 45)
If SMD code is
CAxx = 0x68
CBxx = 0x69
CCxx = 0x6A
CDxx = 0x6B
CExx = 0x6C
CFxx = 0x6D
CGxx = 0x6E
CHxx = 0x6F
some of you will have known this,some may not have

I have still have not got it fully working but it is now talking to the MCP3421 @ address 0x69
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Old 03-24-2022, 09:07 AM   #122
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Default Re: New tool to find short capacitors on motherboards : shorty with display

If there's a question of addresses, there are sketches included in the arduino gui where you can flash a program to the arduino and scan the i2c or spi bus for addresses.
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Old 03-25-2022, 10:54 AM   #123
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Default Re: New tool to find short capacitors on motherboards : shorty with display

Quote:
Originally Posted by clearchris View Post
If there's a question of addresses, there are sketches included in the arduino gui where you can flash a program to the arduino and scan the i2c or spi bus for addresses.
Yes you are right, but the code states
"0x68 is the default address for all MCP342x devices"
Not every one here would be a keen programmer.
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Old 03-25-2022, 02:42 PM   #124
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Default Re: New tool to find short capacitors on motherboards : shorty with display

And the line underneath,yeah come on this is hard work
uint8_t address = 0x69; // addresses do vary depending on smd code
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Old 03-26-2022, 11:50 AM   #125
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Default Re: New tool to find short capacitors on motherboards : shorty with display

Quote:
Originally Posted by badboydas View Post
Yes you are right, but the code states
"0x68 is the default address for all MCP342x devices"
Not every one here would be a keen programmer.
I have done some i2c work lately, and if I can't communicate with the chip, the first thing I do is scan for addresses, not to really check for the address, but to verify communication and wiring.

Hopefully I'd have noticed the different address, but I can't say for certain I would have.
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Old Today, 10:15 AM   #126
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Default Re: New tool to find short capacitors on motherboards : shorty with display

I am a member of the forum where the design work is being discussed for the shorty with display.

There is some recent activity on this project ( as of June 2022) in the thread.

The OP in the EEVlog forum mentioned possible selling the Gerber file for the PCB and I am definitely on board with that.
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Old Today, 10:39 AM   #127
stj
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Default Re: New tool to find short capacitors on motherboards : shorty with display

gerbers arent the issue,
i could cad that up in an hour or so.

the issue is Kripton changed the circuit because it couldnt provide enough stable current.
and a full circuit with changes wasnt released.
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