Voltmeter IC for Measuring Voltage in BCD

[david90]

Is there an IC that ouput the input voltage in BCD? I want to make a voltmeter that can display the voltage in decimal number.

 

[faust9]

Yes, PICs, and AVRs can be programmed to output BCD with a given voltage input... Another option(s) would be a VCO to PIC frequency counter or (like your original question asked) an ADC-BCD IC. There are a miriad of methods available. Cruise by fairchild or dallas semiconductors and look through their products.

Here, Maxim has ADC to BDC near the top of the page: http://para.maxim-ic.com/ADConverters.htm

Personally, I'd use an Atmel micro or a Pic micro for a project like this. The design can be more versatile. You can switch to LCD, serial, or parallel if you feel so inclinde.

Good luck.

 

[david90]

I found this http://braincambre500.freeservers.com/ddv.htm
Just what I'm looking for. I haven't study micro programming yet so that is out of the quesiton.

 

[david90]

the a/d chip on that site uses multiplexing to power the 7 seg led. How does that work? THe chip turn the led on and off so fast that our eyes won't see the flickering?

 

[faust9]

the a/d chip on that site uses multiplexing to power the 7 seg led. How does that work? THe chip turn the led on and off so fast that our eyes won't see the flickering?

Yes

Have you learned how to read the data sheets? If your going to explore electronics, reading data sheets is one of the most important things you can do. http://www.nteinc.com/specs/2000to2099/pdf/nte2054.pdf this tells all you need to know about using this particular chip.

Skip to the circuit description and all should become clear.

Well, good luck