Hello!
I need to build a circuit with a DC output that is ON whenever the AC input is active (a.i. voltage is present at the input) ideally from as low as possible but it could be as high as 200, 250 VAC and still be acceptable but needs to survive up to 1000VAC spike and some 600VAC constant...
I was pondering it would be cool to create a, lets call it a "toy" and suppose it's a bear or a doll or something, which can detect passers by and turn it's head as though it's watching them. Ok maybe it's just creepy.
Is there some kind of sensor, or way of making a sensor, which can detect...
The photodetector is to be used to detect green light from an optical fiber (emitted by fluorecein, about 500nm). I have tried using this detector, but with no readings. This diode has a response of about 0.25 A/W at 500nm.
This is the amplifier I have used (OPA27GP):
Is there a better...