beaglebone metal detector

hi i am trying to build a special type of metal detector called a constant current metal detector. i need to use 7 gpio's to and turn some on transistors and some off in a repeating pattern. i will show a table at the bottom to make things more easier understand what iam trying to do each of the 7 gpio's are responsible for turning on transistor or turning it off switch s57,s58,s59,s60,s61,s62,s63 to s64 are each equivalent to one gpio all the logic states are repeated after the whole cycle has finished. as i see it i can look at it this way if i chose s57 which was gpio60 i would have to put a if statement so it would not just turn the gpio60 on again before the first iteration had finished

S57	S58	S59	S60	S61	S62	S63	S64

on	off	off	on	n/a	on	n/a	off

on	off	off	on	n/a	off	n/a	on

off	on	on	off	on	n/a	off	n/a

off	on	on	off	off	n/a	on	n/a	.

off	off	on	on	on	on	off	off
off	off	on	on	on	off	off	on

off	off	on	on	off	on	on	off

shabaz over 9 years ago

Hi Anthony,

I didn't try to follow the pattern (hint: it would have been easier to follow with colored squares!) however surely any microcontroller or processor can be used for this?
If you're asking how to implement it, you could create an array and step through it using a for loop perhaps, and repeat forever.
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clem57 over 9 years ago

Like this Constant current metal detector - White's Electronics, Inc.?
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clem57 over 9 years ago in reply to clem57

Found this gpio - how to implemment this metal detector code - Raspberry Pi Stack Exchange Could be yours? What state is n/a?
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Former Member over 9 years ago in reply to clem57

i believe it may have been given to me but due to a computer crash i lost the link to the site and could not remember site
and as to other fellow it works similar to that but its not pulse induction its called zero voltage transmission made bruce cany from from minelab i got it from the patent and also i don't what is meant by n/a i gather it means the state of the switch is irrelevent http://www.google.com/patents/US20140232408
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Former Member over 9 years ago

hi guys i hope that additional information helped using python what be the best way to implement the above on a beagle bone black or possibly raspberry pi 2 as i have both devices i just found the support was greater raspberry pi 2 a much larger community than anklebone black
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