hi,
i am an absolute beginner with an "uno". got it under linux after upgrading firmware running well. finished some howtos. blinkin in different ways and "hallo world" and even sound work :). and even i started to understand how to connect the breadboard:) now i am looking for kind of howto connecting a light barrier (low-cost) i built with the arduino uno. The light barrier is workin fine.
idea is: i want to control the speed or more of the light barrier.
i am not looking for a scetch, this i want to make by my own. i need few advices how to connect the light barrier with the uno. google didnt help so far. few hints would be great.
thnx
btw i hope i asked at the right forum place. If not, admin pls move my question
hell, i am sorry ! i am german and took it from dictionary. in german is "Lichtschranke". i do my best:
2 light emitting diodes, distance lets say 2 meters, have contact with a beam. if our cat walks through, i made sure to switch all house-lights on. hope is to understand. thnx for your question.
I see. You have a transmitter on one side, and a receiver on the other side (or, maybe a mirror so the receiver can be next to the transmitter.)
Or maybe you just have the receiver (or detector) and the transmtter runs all the time.
So you need to see that light is being received/detected all the time, and turn on house lights when it is not.
Is there some signal that comes out of the light barrier now?
What do you mean by "speed or more" of the light barrier?
signal from barrier: no. if you break the beam a relay(?) in (german relais) switch it on.
speed or more: future idea: if i understand arduino and light barrier so may be i can connect a camera too and make a picture from a falling water drop. i must laugh will take few years i guess
Ok, in the first post you said the light barrier was working fine. What is the output from that? Is it something you can measure with a multimeter? A light that turns on, a buzzer, anything? We can help you bring that as an input to the arduino.
Folks have made camera triggers based on sound, other things. If you search you can find posts on those.