I am creating a small circuit with an arduino + a ACS712 current Sensor.
I have seen that at times turning on/off a particular device causes large spikes on the AC signal that the ACS712 creates.
I have read that a ZENOR diode can be used to protect a pin. But everything I look at has a combined resister with it and it is confusing me.
I have created a small Fritzing which shows my setup. I am wondering if someone who knows more than me could place a 5.1v zenor diode onto my circuit so I can understand it.
The ACS712 is measuring 240v AC current.
Link to Fritzing Project http://weather.crowe.co.nz/attachments/CurrentSensor.fzz