666=the price of the beast (Sharp IR sensor & cable)
![erco](https://forums.parallax.com/uploads/userpics/032/nK79TF2YS9C2I.jpg)
The $6.66 price is bad for numerologists, but good for bargain hunters like myself:
http://www.ebay.com/itm/New-Arduino-Sharp-GP2Y0A2YK-IR-Infrared-Range-Sensor-With-Cable-/300964844918
It's a Sharp GP2Y0A2YK IR range sensor with analog output. Domestically, I buy these for $9.25 from Junun, specs at http://www.junun.org/MarkIII/Info.jsp?item=73 plus another $1.10 for a cable.
Just found these. They're from Hong Kong, might be counterfeit. I have a dozen of the real units (I hope) from Junun, so I will be able to test them side by side. I ordered two to try out. FYI.
http://www.ebay.com/itm/New-Arduino-Sharp-GP2Y0A2YK-IR-Infrared-Range-Sensor-With-Cable-/300964844918
It's a Sharp GP2Y0A2YK IR range sensor with analog output. Domestically, I buy these for $9.25 from Junun, specs at http://www.junun.org/MarkIII/Info.jsp?item=73 plus another $1.10 for a cable.
Just found these. They're from Hong Kong, might be counterfeit. I have a dozen of the real units (I hope) from Junun, so I will be able to test them side by side. I ordered two to try out. FYI.
Comments
Non-US folks (China seller won't ship to US, curiously) might want to check out the same sensor for AU $3.99 (US $3.64), no shipping specified.
http://www.ebay.com/itm/200940090233
Ken Gracey
I'm almost positive Sharp no longer manufactures these sensors in this form factor, and hasn't for years. So whatever is out there is quite old stock by now.
Wait a minute there, "Ken" Now that you've been to China, how do we know you just aren't a really good copy??? 18 years of "visiting"? Hmmmm......
OK, "Ken", if that's who you really are, who won the 1959 Super Bowl and who kicked the tie breaking goal in the 7th inning???
I was thinking how Sharp had a bunch of these they wouldn't sell into the US. And then 10s of thousands suddenly appeared. I bet that had a hundred thousand of them, but might have preferred not to have them sold in the US to protect their distributor channels.
Someday I'd like to go to China, but I think I'd be like Karl in 'An Idiot Abroad.' Not sure I could ever stomach toad.
http://www.youtube.com/watch?v=lgugWED16PQ
Oh, and Rick, Ken is a lot older than he looks. He's really 84. It's all due to clean living!
He was OK with a non-Ebay transaction. I ordered ten units for $54 total, his "rock bottom" price, paid thru Paypal. Perhaps a tad risky for me, no Ebay protection, but I enjoy a good caper and I've never been stiffed by a China seller. Will advise.
Seller's email is ma jinna <majinna@gmail.com> for anyone who just can't wait.
That doesn't seem to bother this HK servo seller, Gordon. Genuine counterfeit, I bought some. They work, but are very poor copies proudly wearing a Futaba label. http://www.ebay.com/itm/S3003-Standard-Servo-with-accessories-For-RC-Futaba-Car-Boat-NIB-Plane-TR-/181297739170?pt=LH_DefaultDomain_0&hash=item2a362ff5a2
BTW, these Sharp sensors are suddenly popping up all over ebay for the first time. So either somebody just found a warehouse full of originals or it's the latest copycat part. I can already sense a contest with Amanda to find the lowest price!
Sharp GP2D02 digital output sensor, $6.71 free ship from US seller, sale ends in 17 hours. Or make offer. I must have two!
Requires 2 I/O lines for clock & data FYI.
http://www.ebay.com/itm/Sharp-GP2D02-Infrared-Distance-measuring-ranging-Sensor-IR-Ranger-New-/350955542539
Datasheet at http://info.hobbyengineering.com/specs/SHARP-GP2D02.pdf
Application at http://www.ottawarobotics.org/articles/gp2d02/
I managed to avoid this deal the first time is was posted but when you mentioned it here, I could no longer resist. I purchased 6 of them (it seemed an appropriate amount).
Only 6? Please tell me you didn't pay more than $5.40 each w/free ship?
Only 6? You'll have to try harder, my young Padawan.
But don't have one of these 100-550 cm beasts yet: http://www.ebay.com/itm/Sharp-GP2Y0A710K0F-Distance-Measuring-Sensor-distance-100-to-550-cm-with-cable-/181268115065?pt=Home_Automation_Modules&hash=item2a346bee79#ht_568wt_929
Now I will be scouring ebay for more sensor to play with!
That last long-range sensor I linked to really looks like a symmetrical pair of giant robot eyes, like Wall-E, even moreso than the GP2Y0A2YK I used here: https://www.youtube.com/watch?v=08YB5BOLzgU
I noticed the voltage goes up until you get close to it, then as you get really close the voltage starts going back down again. Is that normal?
I think if you get too close the IR spot moves out of the receiving sides field of view. I'm pretty sure I've seen an article explain the geometry of the sensors. I'll try to find it.
Really glad you posted that before I mounted them, thanks.
Very true, I noticed that when I put a horizontal scanning sensor on Spiderbot. Thought I mentioned that somewhere in one of my many useless posts... My solution was to offset it somewhat.
Edit: Le voila: http://forums.parallax.com/showthread.php/151632-Spike-the-Spider-Robot?p=1232292&viewfull=1#post1232292
No trouble doing an end run around Ebay, I still used Paypal. The only odd thing is that I can't contact the seller through his new Ebay listing. I had to go back to "my messages" and reply to an older email from our previous transaction. Maybe I ruined it for everybody else.
Tonight I gave in and ordered one of the jumbo units. Best price was $25 from this US seller: http://www.ebay.com/itm/141324675326
I have an interesting project in mind for this long range unit. It's an autofocus unit, working range is 1-5.5 meters. http://www.sharp-world.com/products/device/lineup/data/pdf/datasheet/gp2y0a710k_e.pdf
That does look interesting. I was going to say let us know how it works when you receive it but I'll go buy one for myself. I can feel your Jedi mind trick working on me as I type.
These are not the droids we're looking for. Must buy sensor.
Curse you Jedi erco.
can pir sensors do this? or a ultrasonic sensor?
Without further information this is impossible to answer.
Welcome to the forum. I removed your duplicate post in the Prop 2 forum. Cross posting is not allowed and the Prop 2 forum was not the appropriate area for that question.
Please read:
http://forums.parallax.com/showthread.php/134682-Forum-Guidelines
No risk of that with PIR or Ultrasonic. You'll need a contact sensor of some sort.
Or, if you got tricky and built the V-notch jig illustrated, and the diameter was big enough to get an ultrasonic reading, you could calibrate that for some kind of accuracy.
Got mine yesterday and I have a pretty cool application in process. Hope it works as planned, will advise.