I was working on a design project which required some cooling fans. The fans I chose from Sanyo Denki have a sensor output which would can be used to feed the microcontroller with the fan information like the speed or whether the rotor has become locked.
I soon discovered that the signal from the sense line has to be conditioned. Sanyo Denki makes a small IC which, with a few resistors and caps, takes the sensor output from the fan and converts it to a micro compatible signal.
Now the catch, the IC is called a L8730 and no one stocks this IC and the minimum order is 100 pieces at $6.00 each. I would never use 100 pieces and the lead time for the device is almost six months.
My question is would it be possible to use a CMOS 555 timer circuit to condition the signal? I am not a design wiz and wondered if someone would be interested in helping me figure this problem out?
If anyone is interested in this little design challenge I can provide them with a copy of the L8730 datasheet and the fan datasheet.
I soon discovered that the signal from the sense line has to be conditioned. Sanyo Denki makes a small IC which, with a few resistors and caps, takes the sensor output from the fan and converts it to a micro compatible signal.
Now the catch, the IC is called a L8730 and no one stocks this IC and the minimum order is 100 pieces at $6.00 each. I would never use 100 pieces and the lead time for the device is almost six months.
My question is would it be possible to use a CMOS 555 timer circuit to condition the signal? I am not a design wiz and wondered if someone would be interested in helping me figure this problem out?
If anyone is interested in this little design challenge I can provide them with a copy of the L8730 datasheet and the fan datasheet.