Tachometer

[richard62]

I am new at this but do have some knowledge on the subject. I am building a digital tachometer for a college project and have picked the 555 timer and icm 7217 chip.. i do not want to use a microcontroler. Is this the right approach and I would want to hook 4 digit 7 segment segment display. Any advise would surely help.

Thanks

Richard62

[Carl_W]

If you do not want to use a microcontroller then what are you using? Are you wanting to program this in LabVIEW?

[richard62]

Thanks carl,

  I want to design this in labview. after I am done I need to build on circuit board. It has to read up to 10,000 rpms. not sure if the 555 timer and icm 7217 will work. What do you think.

Thanks

Richard

[Henrik_Volkers]

I have the impression, that you mixed ud 'circuit design suite' with LabVIEW. In labVIEW you could (ab)use your PC soundcard (and some protection circuit for the line in) and do the rest in software 😄

I assume you want to build something close to fig. 19A in the intersil ICM7217 datasheet...   nearly obsolete this part....