Sharp

Hey everyone. So, I just finished my first robot in a few years, my first being 2 1/2 years ago. This one is a lot more complicated in terms of hardware since I made my own boards and all, and have 5 ICs in one circuit. I'm done with programming and everything runs well but there's one ongoing problem with my Sharp IR GP2D120 sensor.

Ok so I want a basic obstacle avoiding program with my sharp sensor. It is made on the start here robot. The programming language is picaxe basic. After hours of trying I still cant get it going correctly. So i hope u can help me. Thanks

The idea- It is supposed to read the distance and then decide whether it is far enough away to proceed forward or to go to sub program ahead (go backword, I know confusing haha sorry). So if you have any ideas please tell me. Better yet revise my program or make a new one and show me it. Thanks! First time with sharp.

main: 

I have some problems with Sharp GP2D120 IR distance sensor on my next robot, Hammer. Sharp seems to cause noise on the power rail and the noise gets to LM386N-1 audio amplifier making really annoying "ringing" from speaker. Or at least this is what I suspect. Check the embedded video for a sample of that noise (or go here: http://www.youtube.com/watch?v=WIQ0qY6gFpQ). The video starts with Sharp disconnected and then I connect and disconnect it couple of times.

For some time now ive been trying to get m sharp ir sensor to work with my arduino.
its all plugged in and fine but no matter what is infront of it the data will keep bouncing around 1000.

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As you may have seen in the LMR Live Show, we need a replacement for the Sharp sensor used in the Start HEre kit, as the sensor used till now is no longer being produced.

On http://letsmakerobots.com/node/22657 a lot of really new and interesting sensors came to my attention.

Now, since I am going to do a whole ned version anyway (we cant have instructions with images that doesnt match), I was wondering if there would be other parts that should also come in to the modern times?

I am working on a much faster & stronger version of Robot Wall Racers, using quite fast RC-cars

I want to use lasers as distance sensors, but I think they will be a little over budget, altough this is a paid for job :)

Yes, SRF05's clai, they can detect a broomstick on 3 meters.. but in reality they are not stable before say 1.5 meters.

1.5 meters when you are traveling at 25km/h is NOT a lot, when you even are set up with drifting tyres.

Hello

I am trying to control my bot using a sharp IR sensor mounted on hitec servo with arduino mega. The pseudocode i have so far is as follows:

1. Set servo at 90deg and read IR sensor value
2. If val > 200, then stop the bot for a second
  a. Turn servo 0 deg completely and read ir val
  b. if val < 200 then turn bot left
  c. else turn servo 180 deg and read ir val
  d. if val < 200 then turn bot right
  e. else if cant turn right or left, reverse a bit and then turn the bot 180 degree and go straight.

I am shopping for Sharp distance sensors like the one used in "Start Here". My local mail order supplier charges €26 and I am boycotting them for that reason alone.

So I am searching for other suppliers and I find confusing part numbers. I understand the difference between Analogue and Digital sensors. I want the Analogue kind. And I want to measure distances up to 11.8" (30cm).

Are these parts all that different? 

Just found this on hackaday:

" ... Why open collector?
An open collector output doesn’t toggle between high and ground, it toggles between ground and unconnected. The unconnected state, also called high impedance, exerts nothing on the output and allows the signal line to float.
...
Open collector outputs are useful when several sensors need to share the same microcontroller pin. ..." (my emphasis)