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Some Ideas On Using Sonars And Ir'S

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on object and bumpers for robot to get a very good distance from sonar or IR,most read from like 3cm to 80cm its only a example but problem is the nearest reading will be off to make it from from 0 to the farthest detection ,set the sensor back on the robot if 3cm then thats the distance to set it back can do it in software as a offset

another item if your sensor doesnt have a stable reading try 1-10 mfd on the v+ pin on the sensor board,it does need to be one the pcb for it to work well dont want to go to high or to low of a value

another tip for using IR sensors if you place it horiz it will have the widest detection if placed vertical is good for edges and small objects like rods or legs

to narrow the beam pattern on sonars to detect small objects use a paper tube line with sound asborbing material placed on transmitting sonar


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#17  

its $21.90 each if you buy 10 of them $219.50 total maxsonar when i order the last time i paid $17.50 because i got a deal for 20 total cost i paid was $350 now need 20 more almost

#18  

Thanks...how do these work in ARC? Since I only see support for HC-SR04.

#19  

that have ping and echo,ping is RECEIVE pin on maxsonar ECHO is PWM pin then it works the same also has analog output and TTL also can select the MAXSONAR for the beam width ,on other sonars like parallax ,hc-sr04,srf04 and others you cant goes by the model # and gives info on the site witch sensor is need for object beening detected

#20  

I will try one and see what difference it make, which one is best to buy? EZ1? im not expert there are so many maxsonar model...lol

#21  

LV-MAXSONAR-EZ1 is the most common for detection objects and people,it like detecting a pencil or leg EZ4 has the smallest beam width LV line draws 2 ma plus low voltage

#22  

Got it. Probably gonna use this on my omnibot 2000 project. Wall-E is already getting expensive:).

How about making wall-e into line following robot as well, is that possible? how?

Thanks

#23  

yes that is where i am using mine on too line folling is easy only need a led and detector something like IR but just a little different.mostly a optical sensor but very close together,there a simple package for it 4 pin low cost ,will locate the one i have and get the part # or see if i have a lot so can sell some ,i think they cost about $5

info on a line following robot how it works : you place a black line on the floor about 1/4 TO 1/2 width and the floor needs to be a light color ,like white is perfect no black color in is ,can use white paper with a black line in the center now,IR LED SENDS the light to the black line and returns back to the IR detector,depending on the type of digital output high or low if a black line is high ,white line is low,or if sensor is inverted then black line is low and white is high,doesnt matter witch output,can be set up in ARC

now circuit very simple IR LED needs a current set resistor and IR DETECTOR most 2 pins emitter and collector,emitter goes to gnd and collector has a pull up of 10k resistor,somes times is a IR diode used as a detector with anode and cathode but most use whats called a IR phototranstor as a detector

#24  

Ok I have the simple package you're talking about that has both IR and Detector in one package, but how do you hook it up to EZ-B and how to set up in ARC? same with the IR cliff detection script...I've ordered the IR sensor and maxsonar...don't leave me hanging:)

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