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MPaulHolmes · 04-13-2009, 10:52 AM

Not fiberoptics. These optocouplers are only like $0.95 or so.

You turn the PWM rectangle waves into on/off's of an LED that's deep inside a little Integrated Circuit. The LED beams it's light across the void of the inside of the chip (electrically isolated now!) to a thing that turns on and off whenever it gets hit with light.

http://www.mech.uwa.edu.au/NWS/How_t...to_circuit.jpg

04-13-2009, 10:52 AM	#902 (permalink)
MPaulHolmes PaulH Join Date: Feb 2008 Location: Maricopa, AZ (sort of. Actually outside of town) Posts: 3,832 Michael's Electric Beetle - '71 Volkswagen Superbeetle 500000 Thanks: 1,362 Thanked 1,202 Times in 765 Posts	Not fiberoptics. These optocouplers are only like $0.95 or so. You turn the PWM rectangle waves into on/off's of an LED that's deep inside a little Integrated Circuit. The LED beams it's light across the void of the inside of the chip (electrically isolated now!) to a thing that turns on and off whenever it gets hit with light. http://www.mech.uwa.edu.au/NWS/How_t...to_circuit.jpg __________________ kits and boards