From: Nathaniel D. <de...@gm...> - 2010-07-19 11:58:52
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Does anyone know of a way to convert 1.8V to 3.3 V in a bidirectional way? I have 1.8V I was thinking about amplifiers and resistors but it seems like it would be a common problem solved by a specialty device or some other simple means. Any suggestions? |
From: Victhor <vic...@gm...> - 2010-07-19 12:10:32
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If that's for I/O connections you can use the Sparkfun logic level converter. http://www.sparkfun.com/commerce/product_info.php?products_id=8745 > Does anyone know of a way to convert 1.8V to 3.3 V in a bidirectional > way? > > I have 1.8V > > I was thinking about amplifiers and resistors but it seems like it > would be a common problem solved by a specialty device or some other > simple means. > > Any suggestions? > > ------------------------------------------------------------------------------ > This SF.net email is sponsored by Sprint > What will you do first with EVO, the first 4G phone? > Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users |
From: Nathaniel D. <de...@gm...> - 2010-07-19 12:18:45
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Can these be implemented on a custom board? Is there a way to buy them for single channels and configure on a per channel basis? Or even on pairs of channels? I have found Level Shift Transceivers but they seem to group outputs into one voltage range or another while I need ones to shift only specific channels to certain voltages. Thank again Nate On Jul 19, 2010, at 8:10 AM, Victhor wrote: > If that's for I/O connections you can use the Sparkfun logic level > converter. > http://www.sparkfun.com/commerce/product_info.php?products_id=8745 >> Does anyone know of a way to convert 1.8V to 3.3 V in a bidirectional >> way? >> >> I have 1.8V >> >> I was thinking about amplifiers and resistors but it seems like it >> would be a common problem solved by a specialty device or some other >> simple means. >> >> Any suggestions? >> >> ------------------------------------------------------------------------------ >> This SF.net email is sponsored by Sprint >> What will you do first with EVO, the first 4G phone? >> Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first >> _______________________________________________ >> gumstix-users mailing list >> gum...@li... >> https://lists.sourceforge.net/lists/listinfo/gumstix-users > > > > ------------------------------------------------------------------------------ > This SF.net email is sponsored by Sprint > What will you do first with EVO, the first 4G phone? > Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users |
From: Gilson, M. W. <Mar...@jh...> - 2010-07-19 12:25:01
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Here's one level shifter we're using that works well. It has 2 8-bit busses that can be configured to go either direction (or both in same direction). It's used by one of the gumstix boards...can't remember which one. http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=296-14002-1-ND I think you could probably sample some if you wanted. Just remember they are TSOP, so make sure you can solder them...and read up on the datasheet to make sure it's what you want. -----Original Message----- From: Nathaniel Delp [mailto:de...@gm...] Sent: Monday, July 19, 2010 8:19 AM To: General mailing list for gumstix users. Subject: Re: [Gumstix-users] Digital Voltage Conversion Can these be implemented on a custom board? Is there a way to buy them for single channels and configure on a per channel basis? Or even on pairs of channels? I have found Level Shift Transceivers but they seem to group outputs into one voltage range or another while I need ones to shift only specific channels to certain voltages. Thank again Nate On Jul 19, 2010, at 8:10 AM, Victhor wrote: > If that's for I/O connections you can use the Sparkfun logic level > converter. > http://www.sparkfun.com/commerce/product_info.php?products_id=8745 >> Does anyone know of a way to convert 1.8V to 3.3 V in a bidirectional >> way? >> >> I have 1.8V >> >> I was thinking about amplifiers and resistors but it seems like it >> would be a common problem solved by a specialty device or some other >> simple means. >> >> Any suggestions? >> >> ------------------------------------------------------------------------------ >> This SF.net email is sponsored by Sprint >> What will you do first with EVO, the first 4G phone? >> Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first >> _______________________________________________ >> gumstix-users mailing list >> gum...@li... >> https://lists.sourceforge.net/lists/listinfo/gumstix-users > > > > ------------------------------------------------------------------------------ > This SF.net email is sponsored by Sprint > What will you do first with EVO, the first 4G phone? > Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users ------------------------------------------------------------------------------ This SF.net email is sponsored by Sprint What will you do first with EVO, the first 4G phone? Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first _______________________________________________ gumstix-users mailing list gum...@li... https://lists.sourceforge.net/lists/listinfo/gumstix-users |
From: Alex G. <al...@al...> - 2010-07-21 03:46:51
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On 19/07/2010 10:18 PM, Nathaniel Delp wrote: > Can these be implemented on a custom board? > > Is there a way to buy them for single channels and configure on a per > channel basis? Or even on pairs of channels? > > I have found Level Shift Transceivers but they seem to group outputs > into one voltage range or another while I need ones to shift only > specific channels to certain voltages. > > > Thank again > > > Nate Have a look at the schematics on the sparkfun site for their level shifter board >> http://www.sparkfun.com/commerce/product_info.php?products_id=8745 >> Or for i2c see http://www.nxp.com/news/backgrounders/bg_esc9727/ Have a read of Dave Hylands post yesterday titled Re: [Gumstix-users] Problems using I2C on Overo & Tobi board Note the level shifters are for digital only not analog. For analog use a resistor network. Alex -- UTS CRICOS Provider Code: 00099F DISCLAIMER: This email message and any accompanying attachments may contain confidential information. If you are not the intended recipient, do not read, use, disseminate, distribute or copy this message or attachments. If you have received this message in error, please notify the sender immediately and delete this message. Any views expressed in this message are those of the individual sender, except where the sender expressly, and with authority, states them to be the views the University of Technology, Sydney. Before opening any attachments, please check them for viruses and defects. |
From: Mannissa C. <man...@gm...> - 2010-07-19 17:56:01
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You can get cheap level shifters. This is the one I'm using: http://www.datasheetcatalog.org/datasheet/motorola/MC14504BCL.pdf You can simply place it on a breadboard, and the wiring is pretty simple from there. Take a look at the link to the data sheet I provided above. FYI: I bought mine for less than a dollar. :) Good luck! Victhor wrote: > If that's for I/O connections you can use the Sparkfun logic level > converter. > http://www.sparkfun.com/commerce/product_info.php?products_id=8745 > >> Does anyone know of a way to convert 1.8V to 3.3 V in a bidirectional >> way? >> >> I have 1.8V >> >> I was thinking about amplifiers and resistors but it seems like it >> would be a common problem solved by a specialty device or some other >> simple means. >> >> Any suggestions? >> >> ------------------------------------------------------------------------------ >> This SF.net email is sponsored by Sprint >> What will you do first with EVO, the first 4G phone? >> Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first >> _______________________________________________ >> gumstix-users mailing list >> gum...@li... >> https://lists.sourceforge.net/lists/listinfo/gumstix-users >> > > > > ------------------------------------------------------------------------------ > This SF.net email is sponsored by Sprint > What will you do first with EVO, the first 4G phone? > Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > |
From: Andrew K. (m. l. account) <ak...@mi...> - 2010-07-19 13:11:01
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On Monday, July 19, 2010 07:58:12 am Nathaniel Delp wrote: > Does anyone know of a way to convert 1.8V to 3.3 V in a bidirectional > way? > > I have 1.8V > > I was thinking about amplifiers and resistors but it seems like it > would be a common problem solved by a specialty device or some other > simple means. The TXS/TXB series from TI are bidirectional (no direction signal) logic-level translators. TXS0101 is a 1-bit version, for example. The TXS series are a little faster than the TXB ones, but for general I/O either are fine. -A. |