Chief Delphi - Encoders for 2015 Season

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- Electrical (http://www.chiefdelphi.com/forums/forumdisplay.php?f=53)

- - Encoders for 2015 Season (http://www.chiefdelphi.com/forums/showthread.php?t=131492)

jman4747

13-01-2015 16:09

Re: Encoders for 2015 Season

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Quote:

Originally Posted by marshall (Post 1427527)

That's a complicated mess though. Mounting one of these widgets is bad enough. I really just want someone to start selling 3.3v absolute encoders instead of 5v ones.

We are already building a custom breakout to do the conversion... it's just extra circuitry that I'd love to get rid of.

Are the MXP/0-9 GPIO not 5V tolerant?

James Kuszmaul

13-01-2015 16:13

Re: Encoders for 2015 Season

Quote:

Originally Posted by jman4747 (Post 1427551)

Are the MXP/0-9 GPIO not 5V tolerant?

The Talon SRX analog pin isn't.

marshall

13-01-2015 16:14

Re: Encoders for 2015 Season

Quote:

Originally Posted by jman4747 (Post 1427551)

Are the MXP/0-9 GPIO not 5V tolerant?

They are but the Talon SRX is not. The goal is to offload PID control to the Talons. We just need more options for 3.3v absolute encoders that output a 3.3v analog values.

ToddF

14-01-2015 10:06

Re: Encoders for 2015 Season

In 2013 I put together a group buy for sealed US Digital encoders. You can see all the details in this thread:
http://www.chiefdelphi.com/forums/sh...d.php?t=116899

We absolutely love them.

Despite what the product page says (http://www.usdigital.com/products/en...otary/shaft/s4) these are available for purchase. I just got off the phone with the sales rep I worked with on the group order, and they are available for same day shipping.

If someone wanted to put together another group buy to get the price down, we would be interested in participating. But, fair warning, during build season might not be the best time to put one of these together.

Monochron

14-01-2015 12:41

Re: Encoders for 2015 Season

Quote:

Originally Posted by marshall (Post 1427554)

They are but the Talon SRX is not. The goal is to offload PID control to the Talons. We just need more options for 3.3v absolute encoders that output a 3.3v analog values.

Just to put me at ease, the quadrature input pins on the Talon ARE 5V tolerant correct? It is only the analog input that needs 3.3V?

marshall

14-01-2015 13:34

Re: Encoders for 2015 Season

Quote:

Originally Posted by Monochron (Post 1428143)

Just to put me at ease, the quadrature input pins on the Talon ARE 5V tolerant correct? It is only the analog input that needs 3.3V?

That is correct. I highly recommend the awesome datasheet for the Talons that CTRE has: http://www.crosstheroadelectronics.com/Talon%20SRX%20User's%20Guide.pdf

Monochron

14-01-2015 13:50

Re: Encoders for 2015 Season

Quote:

Originally Posted by marshall (Post 1428168)

That is correct. I highly recommend the awesome datasheet for the Talons that CTRE has: http://www.crosstheroadelectronics.com/Talon%20SRX%20User's%20Guide.pdf

Yeah I didn't see any specifications for what voltage was allowed on the quadrature pins. Thanks!

ayeckley

14-01-2015 13:54

Re: Encoders for 2015 Season

We typically use our Automation Direct voucher towards the purchase of the TRD-family ("light duty") encoders they offer. I believe they are re-branded Koyo units.

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