Subject:
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SONARS GALORE!!!
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Fri, 21 Mar 1997 17:40:13 GMT
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Original-From:
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Adam <ADAM@RING.ZENOXstopspammers.COM>
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Viewed:
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1613 times
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For those who are interested.....
I have recently developed a way of signalling 4 sonars
from the HB using a logical switching circuit controlled
by one ranging board and another board developed to switch
which transducer is being signalled by the ranging board.
The NEW board is simply a 7405 (open collector hex invertor)
with 4 680ohm resistors, 4 IRF820 MOSFETs and some connectors
to hook everything together. If anyone is interested. Let me
know and I'll post the schematic. It's actually very simple.
I figure with a 4bit encoder, 16 transducers could be controlled
from the SPI. Even further, the #9 digital output could be used
to switch between 2 4bit encoders and 32 transducers could be
controlled. All this with the use of only 1 ranging unit.
Polaroid sells the transducers in boxes 10 (min. order)
Have fun.
----------------------------------------------------------
Adam B. Cox check out my web page
Computer Engineer http://www.zenox.com/~adam
Zenox Communications Corp. vmail: 416-241-7000 (x224)
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