I was thinking a hi-Z output as well. Especially when Hoodey said he had the sensor outputs 'connected together', you know, like can be done with open collector outputs for a 'wired or' output. But I was also thinking that enough folks have experimented with the Nissan sensors that the output was documented. ? ? ?EssEss wrote:this sounds like a level issue. opto's are usually open-collector - therefore you need a pullup somewhere.
what is 'connect both' ?
Hoodey, are you using the 'interrupt on change' port inputs? And are you having the problem when both the cam and crank signals are connected to the processor on separate input pins? If so, you might have to account for an interrupt occurring while one interrupt is being serviced.
- Jim