johndeverill Posted November 17, 2004 Report Share Posted November 17, 2004 Hi, Relating to my other post. I have a pressure transducer that outputs 0-100mV for 0-30psi. What I would like to do is create a 7 segment led (well double/triple) figure type that would display 0-30 for 0-100mV being supplied.If anyone could point me in the right direction on this one that would be great. Even if you just know a good site that would be fantastic.Many thanksJohn Quote Link to comment Share on other sites More sharing options...
MP Posted November 18, 2004 Report Share Posted November 18, 2004 Look in our projects section for the digital voltmeter project. This sounds like it is exactly what you want.MP Quote Link to comment Share on other sites More sharing options...
johndeverill Posted November 22, 2004 Author Report Share Posted November 22, 2004 Many thanks. Ill take a look,John Quote Link to comment Share on other sites More sharing options...
johndeverill Posted November 22, 2004 Author Report Share Posted November 22, 2004 Hi MP,I've taken a look and I can see it could display the voltage for me fine. The issue I have is that I want to display 0-30 instead of 0-100mV so that it displays the pressure. Can you point me in the right direction so that I can do the conversion?Many ThanksJohn Quote Link to comment Share on other sites More sharing options...
MP Posted November 23, 2004 Report Share Posted November 23, 2004 Hi John, The data sheet has information regarding resistor changes needed for different ranges. This is a pretty versatile chip.MP Quote Link to comment Share on other sites More sharing options...
johndeverill Posted December 2, 2004 Author Report Share Posted December 2, 2004 Hi MP,I may have missed the point here, you'll have to excuse me as I'm quite new to electronics but learning......slowly but surely!!I actually think the input will be 0-330mV for a 0-30psi range off the tranducer. The thing is if i set full scale to be 330mV etc the unit will read 99. What I would like it to read is 30. Can you advise on this?Many thanksJohn Quote Link to comment Share on other sites More sharing options...
johndeverill Posted December 2, 2004 Author Report Share Posted December 2, 2004 Hmmmm,Just been thinking and I may have answered my question.Is it just a matter of changing the resistance to alter Vref so that when the transduer is at full scale the voltmeter is only displaying 30 on the LED's?ThanksJohn Quote Link to comment Share on other sites More sharing options...
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