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Try reducing C10 and C11 down to 22p or 15p. It may also be worth increasing C13 to smooth out the 5v to the MAGPI-1 as there is a lot of heavy switching going on. Add another 0.1 cap to pins 5 and 14 of the MAGPI-1 directly on the underside of the PCB.
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Hi ,does anyone help how i can construct search coil of this detectorComment
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Hi,
Do anyone have the schematics for the Stuart 2 PI? There is lot of version in the forum. I am confuse.... Thanks....Comment
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Hello Fred, do you have the "Modifications" schematic and parts placement for the posted pcb?
Cheers
JohnComment
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Can anyone tell me what the MAGPI-1, IC5 is?Comment
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16f84aComment
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Thank you I wondered if it was that number but there was one in the yellow diagram so I assumed the hex on page 1 was to it, instead of IC5. So I assume the hex is unknown for IC5?Comment
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The Hex for the 16c84a was written by Mark Pauls I believe,It has adjustable properties,as per the yellow diagram.
I ported the hex to a 16f84a,but didnt work.
The only hex that worked was a pre programmed 16f84a supplied by Magenta Electronics in the UK.
That chip is code locked.
I gave up on that project as its performance was not good.
There are many PI projects here...
Some are micro controlled also.
Hope that helps
JohnComment
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hi brothers
iam beginner in electronic
and i looking to make metal detector
so i need simple board with good efficiency in depth
plz advice meComment
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I have persevered with this design and find it excellent. Some modification required. Some errors on the schematic. Code as it comes from Mark Pauls has problems. Some rewriting was needed. Pulse width, repetition rate, read width and read delay are real time adjustable and can be stored in 4 non volatile memory locations and recalled. Set up and optomise for 4 coils, recall as needed. don't underestimate this design, it just needs work.
Eric.Comment
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