Optical sensor on/off

  • #1
Hi all I would like some ideas and pointers on how you think that I could drive my electromagnet to turn on/off with some form of optical sensor. I’m using a 12V 3.6A battery. I’m not too knowledgeable in the optical sensor arena. So if you have any ideas on how I could drive this inductive load give me your thoughts, thanks.
 

Answers and Replies

  • #2
101
4
What do you want the optical sensor to sense? A break in the beam would toggle power to the electromagnet?
 
  • #3
yes, sorry for not making that clear.
 
  • #4
101
4
yes, sorry for not making that clear.

You might want to consider a photointerrupter. And some basic digital logic to control a digital mosfet.
 
  • #5
I'v looked into them, I did not know of any others that may be easer.
 
  • #6
101
4
I have just one more question. Do you need the optical sensor as a safety device such that power to the magnet is cut off when the beam is cut or to mimic the behavior of a switch?
 
  • #8
I need it to mimic the behavior of the switch. I like the idea of a relay but relays have limited life's and don't last for as much repetitions as I need.
 
  • #9
meBigGuy
Gold Member
2,323
405
Then find a solid state photoelectric switch. Granger has them, but they are expensive.

Google "phototriac coupler".
 
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