The IR Sensor seems to be a IR LED
Metal sensor is Analog output so i assume the more induction (Because its an inductive sensor) the more voltage is outputed...
Your PIR Sensor is digital and goes high when there is motion...
If you need information like that datasheets are the way to go... To tell if they're analog or not, go to the datasheet and look at their output, if you find Ouput voltage or anything of that sort it means its analog, (Most single output analog devices are three pin for Vdd Vcc and Out like a LM35 temperature sensor... Digital will probably have four pins and up...
I see your metal detector as LM18-3008NA which is a tubular design having an 8mm sensing distance using open collector NPN output, at least from what I see here. Should that be the case it is either on or off at the output. It is a N/O (Normally Open) output. Max current is 200 mA.
Thanks for this useful informations. . . . .. in my attachments how have they given the output of sensors to microcontroller. . . . . .is this the right way. . . . . .will the microcontroller read that value. . . . . . .
Thanks for this useful informations. . . . .. in my attachments how have they given the output of sensors to microcontroller. . . . . .is this the right way. . . . . .will the microcontroller read that value. . . . . . .