Easier: Interfacing 5v to the Prop.
![Oldbitcollector (Jeff)](https://forums.parallax.com/uploads/userpics/867/nV6URMYKHT1D6.jpg)
Picked up a couple of these from Sparkfun.
Looks like a really easy way to handle the 5v--3v interfacing issue.
Logic Level Converter
www.sparkfun.com/commerce/product_info.php?products_id=8745#
OBC
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New to the Propeller?
Getting started with the Protoboard? - Propeller Cookbook 1.4
Updates to the Cookbook are now posted to: Propeller.warrantyvoid.us
Got an SD card? - PropDOS
Need a part? Got spare electronics? - The Electronics Exchange
Looks like a really easy way to handle the 5v--3v interfacing issue.
Logic Level Converter
www.sparkfun.com/commerce/product_info.php?products_id=8745#
OBC
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
New to the Propeller?
Getting started with the Protoboard? - Propeller Cookbook 1.4
Updates to the Cookbook are now posted to: Propeller.warrantyvoid.us
Got an SD card? - PropDOS
Need a part? Got spare electronics? - The Electronics Exchange
Comments
-Phil
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'Still some PropSTICK Kit bare PCBs left!
PS:· I think a patent on a simple circuit like that is rediculous!· I doubt it would hold up in court anyway...
Graham
@Graham,
I think NXP would have to sell an actual product for it to hold up. It seems too obvious and idea to try to defend.
Leon
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Amateur radio callsign: G1HSM
Suzuki SV1000S motorcycle
Leon is correct although there is not much point defending it for the sake of it.
Graham
Totally! But, at $1.95 per board? And I doubt Sparkfun will sell millions. AND, I don't see Phillips as that big a bean counter. It does them more good to ignore than to litigate, right?
Sorry, no more about patents.
But, can one simply replace the mosfet with a transistor? Just clarifying, cause at some point (soon) all my sensors will go 5V.
-Phil
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'Still some PropSTICK Kit bare PCBs left!
Most circuits I've seen for converting between buses with different logic levels use MOSFETs.
Leon
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Amateur radio callsign: G1HSM
Suzuki SV1000S motorcycle
Post Edited (Leon) : 6/30/2008 5:01:07 PM GMT
"I2C licenses for standard mode under the remaining patents in the program will be free of any royalties, for any use of the patents after October 1, 2006, without any prejudice to any claims for past use whatsoever".
Previously that page used to say ...
"I²C Licensing information - I2C licenses under the remaining patents in the program will be free of any royalties, for any use of the patents after October 1, 2006, without any prejudice to any claims for past use whatsoever".
Not sure Phillips can retrospectively tighten up or restrict such a license, and I have no idea whether it applies to this buffer or not but I wouldn't expect a knock on the door from their lawyers.