Hello!
I have a Denso 19630-64013 alternator. I would like to get the RPM from it. So far I have got:
There is a connector: 90980-11349, one pin is the P terminal, according to some datasheet this is the stator. I have connected this terminal to the base of a bc548 transistor through a 10 kohm resistor. And counting the falling edge with Arduino. It works okay, but my problem is that I have counting around 180 pulses per sec (10800 rpm) with no gas, with full gas around 570 pulses per sec (34200 rpm). If I divide those numbers with 12, then I would get 900 rpm to 2850 rpm, which sounds ok. But how do I get the 12? Or is it correct?
Thanks,
Szotyi
I have a Denso 19630-64013 alternator. I would like to get the RPM from it. So far I have got:
There is a connector: 90980-11349, one pin is the P terminal, according to some datasheet this is the stator. I have connected this terminal to the base of a bc548 transistor through a 10 kohm resistor. And counting the falling edge with Arduino. It works okay, but my problem is that I have counting around 180 pulses per sec (10800 rpm) with no gas, with full gas around 570 pulses per sec (34200 rpm). If I divide those numbers with 12, then I would get 900 rpm to 2850 rpm, which sounds ok. But how do I get the 12? Or is it correct?
Thanks,
Szotyi