Hello friends
I need one simply help, from you.
I would like to resused one old Tachometer from my car, but due to the fact of the car don´t have any sensor, I was thinking to use the alternator that it gives 210Hz at 750rpm it gives, for max rpm 5000rpm it gives 1290Hz. Amplitude is ~16V.
Now the tachometer accepted square wave whit 12V at maximum scale 7.000 rpm whit 233Hz, so for example the 3.100 rpm should be 103Hz: like the photo.
http://i236.photobucket.com/albums/ff166/PhantasticPhoto/img_3262_rs2.jpg
So my question, how can I make one simply wave converter whit frequency adapter, use the IC 741, but looks I can only have the same frequency?
Thanks,
JL
I need one simply help, from you.
I would like to resused one old Tachometer from my car, but due to the fact of the car don´t have any sensor, I was thinking to use the alternator that it gives 210Hz at 750rpm it gives, for max rpm 5000rpm it gives 1290Hz. Amplitude is ~16V.
Now the tachometer accepted square wave whit 12V at maximum scale 7.000 rpm whit 233Hz, so for example the 3.100 rpm should be 103Hz: like the photo.
http://i236.photobucket.com/albums/ff166/PhantasticPhoto/img_3262_rs2.jpg
So my question, how can I make one simply wave converter whit frequency adapter, use the IC 741, but looks I can only have the same frequency?
Thanks,
JL