Where can I buy Gyros that fit requirments?

[Salik Syed]

Where can I buy gyros/yawrate sensors that fit with the requirments (price wise) and can interface w/ the robot computer w/o any custom circuitboards or anything? Can i use the Analog Devices ADXR150EB ? I'm not sure if it works with the robot controller and outputs the same stuff....

[jacob_dilles]

Originally Posted by Salik Syed

Where can I buy gyros/yawrate sensors that fit with the requirments (price wise) and can interface w/ the robot computer w/o any custom circuitboards or anything? Can i use the Analog Devices ADXR150EB ? I'm not sure if it works with the robot controller and outputs the same stuff....

http://www.drrobot.com/products_wiro...p?categoryID=7 is a good source... the ADXR150 outputs a 40KHz samplerate 'analouge' value ( do a search on this there are hundrads of posts ) and can be read by the RC ana_in's

[KenWittlief]

you could use the Analog Devices ADXRS150EB which has a +/- 150° per second rate, or the Analog Devices ADXRS300EB which is +/- 300° per second

we are using the 150 on our bot - you connect +5 V and Gnd to a couple pins I think there are 2 +5V pins - and the signal that is produced if perfect for the analog inputs to the Robot controllers - roughly 0 to 5 volts

I got a pair from Avent electronics for $50 each - I dont know if future or digikey has them in stock - their prices were higher.

search on ADXRS150EB here on CD - you will find several threads discussing how to use them.

[Salik Syed]

I could not find any Gyros on the Dr. Robot page that you gave me....maybe i don't geet something.... can you give me the web address for avent electronics if i search i just get loads of garbage...
thank you
Salik Syed...
btw the gyros from 2003 or 2002 are definitely overpriced right?

[KenWittlief]

oh gosh- Ive been so brain dead lately!

I spelled it wrong in my post - its Avnet

sorry about that

edit: this is the electronics part page - but they show none in stock now
http://www.em.avnet.com/

you might try calling them - they may stock them as samples since they are evaluation boards

[Salik Syed]

Aha...........thanks.....do you know of anyother places where i can be able to get them? anyone ? Thank You

[KenWittlief]

if you cant find any from the distributors or catalogs, you might start a new thread specifically asking if anyone has a extra ADXRS150EB that they could spare?

I got two and would hate to give my only spare away, since its vital to the operation of our robot

but some teams might have purchased several and be willing to give up one.

but I would start a new thread to ask - not everyone reads everythread on CD all the way to the last post.

[Joe Ross]

Originally Posted by KenWittlief

I got a pair from Avent electronics for $50 each - I dont know if future or digikey has them in stock - their prices were higher.

Remember that even if you get the part from a different source, you must count the digikey/future active/newark price when doing your BOM.

edit: nevermind, see below

[Dave Flowerday]

Originally Posted by Joe Ross

Remember that even if you get the part from a different source, you must count the digikey/future active/newark price when doing your BOM.

That's what I thought as well, but the FIRST Q&A says differently:

Q: We heard that a single gyro evaluation board (ADXRS300EB) at Future-Active costs $100.50, but if several are bought, the price is about $97.00. Also the device is available at Analog Devices for $50.00. Is it legal to use this part?
A: You may use this part, and the lower price from Analog Devices is OK for costing purposes.

[Joe Ross]

oops, I misread that message on Q/A. I had though it said the lower price from future active.

carry on.

[KenWittlief]

digikey lists them for $75 - so they are technically not over the $100 limit for a single item rule - thats the price I put on our BOM, even though we got em for $50

its like, if I give you one for free, you still have to put down its 'normal' value.

[Doug G]

Should I buy the one with the PC board (EB) or ABG which it just says is a GYRO

[Mark McLeod]

Originally Posted by Doug G

Should I buy the one with the PC board (EB) or ABG which it just says is a GYRO

Order the EB (evaluation board). It comes in a 20 pin mount that'll fit right into a regular printed circuit board.
The other is impossible to solder without very specialized equipment.

[Joe Johnson]

Originally Posted by Mark McLeod

Order the EB (evaluation board). It comes in a 20 pin mount that'll fit right into a regular printed circuit board.
The other is impossible to solder without very specialized equipment.

The ball grid array is a MAJOR pain to work with. It took a very skilled electrical tech in our building 4 hours to wire a single yaw sensor and another similar 2D accelerometer (ADXL202) with the circuit that comes build into the EB versions. The only reason we did it was to meet the $200 limit. Now that FIRST has made the limit $300 and has allowed us to use a $100 "EB" part while only accounting for a $50 "ball grid" part (see above), there is no way I would have had a team member spend that kind of time (the only benefit is that it "saves" $50 -- not worth 4 hours of a persons time).

Bottom line: Buy the EB version and run.

Joe J.

[Salik Syed]

This circuit board that it fits onto.......where do i get it......do i have to make the circuit board or something like that????... We don't really have that capability...i mean i was hoping 3 wires.. ground 5v and signal and i'd just put some crimps on