What sort of range do you get out of high power leds ?
I'd go with LEDs
Are there any ways this could be made faster ?
but are IR phototransistors responsive to IR emitted by humans & animals,
Please enter a valid email to subscribe
We need to confirm your email address.
To complete the subscription, please click the link in the
email we just sent you.
Thank you for subscribing!
via Egeo 16