--- In [EMAIL PROTECTED], Jon Elson <[EMAIL PROTECTED]> wrote: > Fred Smith wrote: > > >I have a control signal that varies from 0-5vdc and want to use it on > >another device that needs 0-10vdc. Fast control response is not > >required. > > > >Available power is 5vdc and 12vdc both regulated. > > > >A solution that fits home-hobbyists budgets is required. > > > >What kinds of solutions can be used? > > > >An LM317 variable voltage regulator might be a possible solution > >(certainly cheap). > > > >Is there a ready to go solution already available? > > > > > I think this would be difficult with just a regulator chip. An OP Amp > is the tool of choice. Use a rail-to-rail op amp if you really need to > go all the way to zero. Or, power the op amp from +12 and -5 or - 12 V, > so it can deliver zero volts when needed. > > The circuit would be to connect the 0-5 V input to the + input of the > op amp. Connect a 10 K resistor from the output to the - input. > Connect another 10K resistor from the - input to the signal ground. > The output will now swing from 0-10 V as the input goes from 0-5. > You may need a small capacitor, say 100 pF in parallel from output > to - input to stabilize the op amp. > > Jon
If you can get the rail to rail from Radio Shack, you can use a small perf board and get it put together in short order. If not, a 15 volt transformer with center tap would offer the ability to get enough voltage spread for a 741 op-amp. it uses the negative to get below zero and Forrest Mimms has a small booklet on op-amps with circuits at radio shack. still all fit on a perf board from RS Dave Addresses: FAQ: http://www.ktmarketing.com/faq.html FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/ Post Messages: [EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] Unsubscribe: [EMAIL PROTECTED] List owner: [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED] Moderator: [EMAIL PROTECTED] [EMAIL PROTECTED] [EMAIL PROTECTED] [Moderators] URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO OFF Topic POSTS: General Machining If you wish to post on unlimited OT subjects goto: aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if you have trouble. http://www.metalworking.com/news_servers.html http://groups.yahoo.com/group/jobshophomeshop I consider this to be a sister site to the CCED group, as many of the same members are there, for OT subjects, that are not allowed on the CCED list. NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........ bill List Mom List Owner Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
