http://www.onsemi.com/pub_link/Collateral/NL17SZ17-D.PDF well, i will stop sending email, find at maxim, microchip, national, analog devices, and others and search schimitt triger and buffers
Em 11 de março de 2012 12:47, Roberto Spadim <robe...@spadim.com.br> escreveu: > http://www.datasheetcatalog.org/datasheet/philips/74LVC14APWDH.pdf > Hex inverting Schmitt-trigger with 5V tolerant input > > > > Em 11 de março de 2012 12:44, Roberto Spadim <robe...@spadim.com.br> escreveu: >> you could use a opamp like a buffer or schimitt triger (first is >> analog, the second is 'digital') >> >> first check what´s the max/min voltage and select a right buffer opamp >> (it´s not isolate like double coil transformers, or optocouplers) >> if you want isolation, use a optocoupler or a isolated transformers >> (double coil transformers normally) >> if you want less voltage you can use zener diodes to cut max voltage >> (check what´s the current you will use) >> >> check that relay is not only a on/off circuit, it have a time to turn >> on, and a time to turn off, it´s like a big digital output lowpass >> filter >> if your circuit is very fast maybe you will need a rc filter (low pass >> filter) >> opamp with buffer configuration is usual in analog signals, schmitt >> triger are usual in digital signals, there´s cmos/ttl buffers that >> make the same job like schimitt triger but with diferent voltage >> levels >> check: >> >> http://en.wikipedia.org/wiki/Schmitt_trigger >> http://en.wikipedia.org/wiki/Buffer_amplifier >> >> here have many usual components to eletronic with boards and devices >> included: >> http://www.mikroe.com/eng/products/view/208/mikrobuffer-board/ >> http://www.mikroe.com/eng/products/view/209/mikrobuffer-proto-board/ >> http://www.mikroe.com/eng/categories/view/41/various-boards/ >> >> Em 11 de março de 2012 11:45, Patryk <p4tr...@o2.pl> escreveu: >>> Dnia 11.03.2012 o 14:47 Chris Lautre <chris.lau...@karusoft.com> Chris >>> Lautre <chris.lau...@karusoft.com> napisał(a): >>> >>>> Hi >>>> >>>> A while ago I saw some discussion about a Vibration sensor. >>>> I have found an adjustable one that works great: >>>> http://www.assemtech.co.uk/ >>>> There are 2 models NPN(PDS1000-1) and PNP(PDS1000-2) output. >>>> They are about 40 GBP. >>>> >>>> I have the circuit below working fine. >>>> The DS2406 reads the Relay open/close. >>>> I know there must be a way of reading the output without using the relay. >>>> (My circuit design knowledge is a bit limited to say the least) >>>> Can anyone suggest a suitable circuit? >>> >>> I'm not an expert myself. I would use a optoisolator. Those are cheap and >>> draw less power than a relay. >>> http://en.wikipedia.org/wiki/Opto-isolator >>> >>> Here's one 4N33 it about $1 and you will need some resistors >>> http://www.me.umn.edu/courses/me2011/arduino/technotes/4N33.pdf >>> >>> Look at the page 4 on the left there is example of a circuit. >>> However the one thing I'm not sure if this particular one(4N33) would run >>> 5V on the detector side. If you have some local electronics shop I think >>> they will give you one suitable for 5V. >>> >>> Or maybe the 6N138 can be supplied with 5V on detector side. >>> >>> I never used those but once built one optoisolator from a diode and >>> phototransistor an put them in a black shrinktube. If your local shop does >>> not have optoisolaotrs(optocouplers) the will certainly have a >>> phototransisotr(which looks like a LED) >>> >>> >>> -- >>> p4trykx >>> >>> ------------------------------------------------------------------------------ >>> Virtualization & Cloud Management Using Capacity Planning >>> Cloud computing makes use of virtualization - but cloud computing >>> also focuses on allowing computing to be delivered as a service. >>> http://www.accelacomm.com/jaw/sfnl/114/51521223/ >>> _______________________________________________ >>> Owfs-developers mailing list >>> Owfs-developers@lists.sourceforge.net >>> https://lists.sourceforge.net/lists/listinfo/owfs-developers >> >> >> >> -- >> Roberto Spadim >> Spadim Technology / SPAEmpresarial > > > > -- > Roberto Spadim > Spadim Technology / SPAEmpresarial -- Roberto Spadim Spadim Technology / SPAEmpresarial ------------------------------------------------------------------------------ Virtualization & Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but cloud computing also focuses on allowing computing to be delivered as a service. http://www.accelacomm.com/jaw/sfnl/114/51521223/ _______________________________________________ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers
