You are buying a Talon SRX breakout board. The Talon SRX is the latest smart speed controller of the Talon platform from Cross the Road Electronics and is widely used in FIRST Robotics competitions.

The header pins provided by the Talon SRX are described in Section 1.4 of the Talon SRX User's Guide.

Features:
  • Piggyback board mounts directly onto the controller. No ribbon cable is needed!
  • LED's to show limit switch activity
  • Supports both 5V and 3.3V analog encoders. Just set the micro-switch on the board to the correct setting.
  • Supports quadrature encoders
  • Supports shrouded connectors for secure connections (not provided)
  • Completely open-source
The board comes with a 12-pin header as shown in the photo. The header has standard 0.1" spacing.

Open-source files:
  • Eagle CAD schematic and board files can be found here
  • Gerber files can be found here
  • Bare PCB's can be ordered here
  • Bill-of-materials can be found here

Included in this auction:
  1. Talon SRX speed controller breakout board as shown in the photos
  2. 12-pin header with 0.1" spacing
Take a look at the team's other breakout board for the RoboRIO.

Tip1: Remember to use good soldering techniques when attaching the headers! Faulty solder joints can cause intermittent electrical problems.
Tip2: Try to keep the underside of the board smooth (see reviews below). Look at the photo to see how the pins should be soldered.

Designed, built and tested by MVRT #115

Reviews:
"Hi, I've been meaning to send you our comments on the two boards we ordered.
The good: The boards work like we hoped. We're using them a little differently than generally intended by sending the sensor data from the talon to the Rio. We have two IR proximity switches connected to the encoder inputs for feedback and an analog absolute encoder as well. We made an adapter cable to go from the encoder connection to our proximity switches to get the signal onto the board.
We like not having any trace or plane under the screw mounts, makes it a lot less worrisome someone will torque the board down and short traces together.
The bad: During soldering, the tab on the 3.3/5v switch broke. We're not sure why, but we were able to use a jewelers screwdriver to set it to 5v. I think the switch was rubbed a few too many times by the stand we used to hold it during soldering but we're not sure.
Future: We're going to see if we can use our IR proximity switches on the limit switch inputs. We're going to check the drawings first.
Recommendations/Requests:
1) See if a more robust switch can be found or find a tab which doesn't stick up. Also possible, not having it pre-soldered or having the whole board pre-soldered.
2) Consider adding a power pin to the limit switch for active/powered discreet sensors. We're probably unusual in the number of sensors we run every year, but we like being able to have all sensors go into the motor controller(s) for each subsystem.
3) The pins could use a little repositioning with regards to the underlying talon. The board is at a noticeable angle relative to the talon due to the through hole pins. We trimmed them shorter but the board still angles up. Anything which would allow the board to lie flat would improve the long term life of the board. For example, changing the pin placement/orientation such that the stub sticking through the board sits between the talon fins would allow it to sit lower.
Regardless, you guys have the best board we've seen so far and we plan to get more as we need them. "

"We have been using these for the past couple of months now. We really like the ability to get to all the pins of the Talon on this board instead of making choices from a subset with other breakout boards. That feature allows for changing needs in an adaptive environment. Instead of using the supplied headers, we used a locking header that will secure the cable during competition without resorting to hot glue. We used a molex connector of this family from digikey WM4114-ND.
Be sure to smooth down the through-hole pins on the back side to prevent them pricking through your insulator and shorting to the Talon case.
As stated in the other review, rearrangement of the pins so the board sits flat would be nice."

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