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Hi there!!!
I have read this post http://www.geotech1.com/forums/showt...314#post129314
Tepco wrote:
My detector is not exactly Surf, but similar, just works whit different timing. I believe this component values will be good for Surf and mod's will work on different boards and SM incarnations.
First, you have to change TX timing, whit these values you will have about 5.2kHz repetition and 18uS pulse. (components referred to "original" White's schematic, check what you have on your PCB version)
Change R2 (3K3), between 555 pin 6&7 to 1.2K (or 1.5K) this will shorten TX to 18 (22us). Change R1 (100K) between 555 pin 8&7 to 10K, to increase frequency.
My question is: can I make these changes to my surf PI 1.2 kit without modifying the sample timing? And if yes, what would I get with this mod?
Thanks to all
Andrea
I have read this post http://www.geotech1.com/forums/showt...314#post129314
Tepco wrote:
My detector is not exactly Surf, but similar, just works whit different timing. I believe this component values will be good for Surf and mod's will work on different boards and SM incarnations.
First, you have to change TX timing, whit these values you will have about 5.2kHz repetition and 18uS pulse. (components referred to "original" White's schematic, check what you have on your PCB version)
Change R2 (3K3), between 555 pin 6&7 to 1.2K (or 1.5K) this will shorten TX to 18 (22us). Change R1 (100K) between 555 pin 8&7 to 10K, to increase frequency.
My question is: can I make these changes to my surf PI 1.2 kit without modifying the sample timing? And if yes, what would I get with this mod?
Thanks to all
Andrea