Post by thread:[OT]: Regulation voltage

Hello! Maybe some kind person want to help me with this problem: I have two voltages on 13,3 and 12V as I want to take down to a level on 2,3 and 1V, accordingly the same difference between them. The voltages isn`t pre-set without changing between 13,3 and 12V. My intention is to with this voltage drive a levelindicator. Is there any IC as can do that or it`s possible on any other way? Thanking You in advance ! Regards ÅkeN -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email spam_OUTlistservTakeThisOuTmitvma.mit.edu with SET PICList DIGEST in the body

I have two voltages on 13,3 and 12V as I want to take down to a level on 2,3 and 1V, accordingly the same difference between them. The voltages isn`t pre-set without changing between 13,3 and 12V. My intention is to with this voltage drive a levelindicator. Is there any IC as can do that or it`s possible on any other way? More information needed. What are you trying to do with these voltages? Why do you need to maintain the same difference or are you effectively trying to measure the difference? What is the level indicator telling you? Are the voltages always 13.3 and 12 (if so its an easy task :-) ) or do they vary and if so over what range? How much does the difference vary by.? Is one always larger than the other or can they swap? What we really need to know to answer your question well is - "WHAT ARE YOU TRYING TO DO?" regards Russell McMahon -- http://www.piclist.com hint: To leave the PICList .....piclist-unsubscribe-requestKILLspam@spam@mitvma.mit.edu

Hello Russell, Thursday, March 22, 2001, 1:20:40 PM, you wrote: RM> I have two voltages on 13,3 and 12V as I want RM> to take down to a level on 2,3 and 1V, RM> Is there any IC as can do that or it`s possible RM> on any other way? It seems, I seen some ICs on MAXIM web-site http://www.maxim-ic.com -- Best regards, Alexey Musin

At 08:20 PM 3/22/01 +1200, Russell McMahon wrote: >I have two voltages on 13,3 and 12V as I want >to take down to a level on 2,3 and 1V, >accordingly the same difference between them. >The voltages isn`t pre-set without changing >between 13,3 and 12V. >My intention is to with this voltage drive a >levelindicator. >Is there any IC as can do that or it`s possible >on any other way? Use a Zener diode to "trim off" the excess voltage. -- Dave's Engineering Page: http://www.dvanhorn.org Where's dave? http://www.findu.com/cgi-bin/find.cgi?kc6ete-9 -- http://www.piclist.com hint: To leave the PICList piclist-unsubscribe-requestKILLspammitvma.mit.edu

> At 08:20 PM 3/22/01 +1200, Russell McMahon wrote: > >I have two voltages on 13,3 and 12V as I want > >to take down to a level on 2,3 and 1V, > >accordingly the same difference between them. > >The voltages isn`t pre-set without changing > >between 13,3 and 12V. > >My intention is to with this voltage drive a > >levelindicator. > >Is there any IC as can do that or it`s possible > >on any other way? I think he wants to reduce the voltages but still keep the 1.3v difference between them? Zener diodes are not perfect ,ie the zener knee varies greatly with voltage changes. Maybe two opamps? One op amp? What sort of level indicator is it?? :o) -Roman -- http://www.piclist.com hint: To leave the PICList .....piclist-unsubscribe-requestKILLspam.....mitvma.mit.edu