Dave Koller
New Member
I have found a ratio of 2.76 from the transmission of a Saturn SL2's VSS (Vehicle Speed Sensor NOT power terminal lol) at 230 HZ it goes to the PCM (Power Control Module ie computer) and outs 60MPH to speedometer in pulses at 83.333333 HZ. - hence 230 \ 2.76 = 83.333333... My car is now being converted to electric and I would like to get rid of the PCM to run the speedometer ... VSS will vary from 0 to under 300 HZ and I would like to divide this frequency by 2.76 - always... I know how to do this in software BUT do not want to go that route..
Generating new frequencies with decimal points is hard with embedded micros.. IS there a simple way to do this with flip-flops or programmable chips.. the decimal part has me stumped. I can use PLL and multiple by 100 then divide using 276 but there must be some way I have overlooked... Thanks.
Dave
Generating new frequencies with decimal points is hard with embedded micros.. IS there a simple way to do this with flip-flops or programmable chips.. the decimal part has me stumped. I can use PLL and multiple by 100 then divide using 276 but there must be some way I have overlooked... Thanks.
Dave