Modify an m104 tachometer to work with an om603?
Modify an m104 tachometer to work with an om603?
anyone worked with a w116 tach before? it looks to be based off the same frequency to voltage conversion set up but with a slightly more complicated front end. im also having trouble getting a pin out for the main chip its a SN29707P. just trying to figure out which of the small MKP caps is the main biasing cap for the chip. the standard w123,126,124,ect,ect tachs use a LM2917 which is easy to find pin outs for but im not having any luck with the 29707.