====== Garagenzugang ======
---- datatemplateentry project ----
template      : :sys:tpl:project
description   : Automatische Geragentorverrigelung/-öffnung
coordinators  : [[:users:skruppy:]]
confidants    : 
state_tags    : in progress
type_tags     : elektro, software, AVR, C
----

===== IR Sensor =====
4-Fach OP-Verstärker:
<code>
KIA324P
     8C
</code>

Komplette Platine analog => Lampe als Schnitstelle zu mC verwenden + Helligkeitssensor abzicken (dunkel machen) [oder im gehäuse lassen und wieder abkleben]

{{:projects:pir-sensor-back.jpeg?direct&760|}}

{{:projects:pir-sensor-front.jpeg?direct&500|}}

===== Türöffner =====
{{:projects:door-lock.jpeg?direct&750|}}

===== System =====
{{:projects:garage.jpg?direct&300|}}


<code>
setState(state) {
    switch(state) {
        unlocked:
            disableIsr(unlockSwitch/ir);
            enableIsr(door);
            break;
        locked:
            enableIsr(unlockSwitch/ir);
            disableIsr(door);
            break;
    }
}

ISR(unlockSwitch/ir) {
    setState(unlocked);
}


ISR(door) {
    setState(unlocked);
    setLed();
}

////////////////////////////////////////////////////////////
// Detect current peak                                    //
////////////////////////////////////////////////////////////

// Find a rising edge (the same as the code below) (rising edge has to be detected before falling ege to prevent detection of the power on current)

// Find a falling edge
while(true) {
	if(adx >= error) {
		stop();
	}
	else if(adc > max) {
		max = adc;
		th = adc;
	}
	else if(adc < th) {
		if(th == max) {
			th *= 0.9;
		}
		else {
			stop();
		}
	}
}
</code>


[[http://www.ganssle.com/debouncing-pt1.htm|Debouncing statistics]]