Talon SRX Data Port Header

[SquishyIce]

I've been trying to find a header that would work with the ribbon cable that connects to the data port header on the SRX, and I think I've found it: http://www.digikey.com/product-detai...C10K-ND/755176 Will this part work? If not, could someone direct me to one that will?

[marshall]

Originally Posted by SquishyIce

I've been trying to find a header that would work with the ribbon cable that connects to the data port header on the SRX, and I think I've found it: http://www.digikey.com/product-detai...C10K-ND/755176 Will this part work? If not, could someone direct me to one that will?

That part will not work. That is a .1" spaced header. The Talon SRX uses a .05" spaced header. I don't have a link handy to a part but I can find one later if someone doesn't beat me to it.

Also, don't forget your team's digikey voucher if you order anything from them.

EDIT:

Links:

I think these are all valid but double check them. It kind of depends on what you want. The .05 pitch makes these things tiny.
http://www.digikey.com/product-detai...627-ND/3883661
http://www.digikey.com/product-detai...629-ND/3883266
http://www.digikey.com/product-detai...5-5-ND/2264346
http://www.digikey.com/product-detai...389-ND/2264370
http://www.digikey.com/product-detai...383-ND/2264364

[SquishyIce]

Thanks a ton! I've been looking at making a custom breakout for the SRX, and depending on the path forward, that female header may come in very handy. Thanks again for your help!

[nixiebunny]

I am also thinking of making a different (better) SRX encoder breakout board.

Here's what it needs:

A 5 pin 0.1" header to match the Cui AMT103-V pinout, including Index

Two 2 pin 0.1" headers for the limit switches

A 3 pin 0.1" header for the analog pot sensor

A set of mounting screws so you can stick it to the robot!

Who wants some?

[nixiebunny]

I think a breakout board on the Talon might make more sense than having it at the end of a ribbon cable. A nice connector is this one:

Digikey 609-3754-ND

The board wants to be designed so that it is centered on the Talon when the plug is centered in the header.

[dellagd]

Speaking of the data port, the product description lists the Talon as being able to communicate over CAN and PWM, but also SPI and UART. Has anyone seen anything regarding the SPI and UART? The terms don't show up in the manuals.

[picklednerd]

Our team actually felt the exact same way about the current Talon breakouts; we aren't fans of the ribbon cables. We just finished designing two Talon boards, a breakout and a 5v to 3.3v analog converter, that mount directly to the Talon SRX. I've attached the white paper we've written, which includes all of the parts links on Digikey. If you'd like Gerber files or the Altium project files, I'd be happy to send them.

[Ether]

Originally Posted by picklednerd

We just finished designing two Talon boards, a breakout and a 5v to 3.3v analog converter, that mount directly to the Talon SRX.

Are you saying you will be mounting the Talon to a PCB board instead of mounting it to a heat-sink surface?

[SquishyIce]

Interesting design ideas... We were toying with the idea of mounting directly to the talon, but we went with (ironically) more ribbon cables. We basically feed all the data ribbon cables into one board that puts all the signals into a 34-pin ribbon cable which goes out to a board closer to the actual encoders and whatnot to reduce on messing with getting the encoder wires all the way back. I may end up adapting picklenerd's design into a board that supports multiple talons...I hadn't thought of using a jumper to switch between 5v and 3.3v for the quad. encoders. Maybe I'll revise our current design if we get a bit of pocket change, we JUST ordered boards tonight.

[marshall]

Originally Posted by Ether

Are you saying you will be mounting the Talon to a PCB board instead of mounting it to a heat-sink surface?

The breakout will be mounted to the top of the Talon. The Talon will be mounted to the chassis. At least, that is the current plan.

[Ether]

Originally Posted by marshall

The Talon will be mounted to the chassis.

Don't forget the TIM. It's explicitly permitted in the 2015 rules.

[wireties]

something like this? needs mtg holes though...

[Mike Copioli]

This is an example of what we had envisioned when designing the SRX encoder breakout.

We found that mounting a PCB directly to the Talon's housing is not without risk. Foreign objects such as wrenches, misplaced hands... would damage the PCB and sometimes the Talons data connector.

The other concern, there is no female counter part to the Data connector, at least not one that is keyed. This would make it possible to insert the breakout backwards, which could damage both the Talon and the down-stream device.
Since there is no easy way to enforce polarity we felt it would cause less stress for teams to have a breakout that was inline with the Talons wiring.

[wireties]

Originally Posted by Mike Copioli

We found that mounting a PCB directly to the Talon's housing is not without risk. Foreign objects such as wrenches, misplaced hands... would damage the PCB and sometimes the Talons data connector.

Yeah - it would be nice if the mounting holes were positioned so that they would polarize a top-mounted board. But the data connector will be protected by the board itself. I'm thinking the board is passive and in no more danger that the kinda-thin and vulnerable 0.025 ribbon cable. We are crossing our fingers.

[Ideal_Nerd]

We are making a board that mounts to the top of the talon. We are just breaking out the the pins. We are then going to print a case to protect it. I will post pics on the 24th when we get the boards.