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TASS

The TASS Computer-Controlled Switch System

The TASS (Totally Awesome Switch System) is a general purpose 8 port DC-150 MHz relay-based switch. The hardware is designed to be very generic, with an inexpensive processor such as an Arduino providing the system logic. Control is via USB, with ethernet and other interfaces also available.

The TASS can be configured several ways, and multiple boards can be combined to create large switching systems. The TASS has many uses, from switching signal sources on a test bench or in a laboratory, to selecting receive antennas and filters in a ham or SWL station.

The TASS system has two boards:

  • The TASS-R relay board, which does the mechanics of signal switching and provides a very simple 10-pin interface
  • The TASS-SHIELD board for use with an Arduino Mega 2560 microcontroller. The TASS-SHIELD allows up to four TASS-R boards to be controlled simultaneously.

The final component is open source software for the Arduino that acts as an interface between a host computer or other input system, and the switching hardware.

Note these important points:

  • The TASS-R board can handle 10W of RF power. It is not intended for use with greater-than-QRP level signals.
  • The TASS-R board requires nine digital control signals for full functionality. Thus, an Arduino R3 or similar board can control a single TASS-R, but may not have enough I/O lines available to support touchscreen, ethernet, or other add-on components.
  • The TASS-SHIELD mates to an Arduino Mega 2560 processor, which provides enough I/O to support four TASS-R boards with lines left over for other uses. TAPR does not provide the Arduino, but it is available from many sources for less money than TAPR would have to charge.

An introductory video is available on YouTube, or from the TAPR site at http://tapr.org/~n8ur/TASS/TASS_Intro_26Sep15.mp4

Software and documentation can be downloaded from http://tapr.org/~n8ur/TASS.

Documentation and software are still under construction, so check for updates.


Ordering Information

The price for the TASS-Shield is:

  • $ 19 US for members of TAPR

  • $ 19 US for non-members

    + shipping/handling if applicable.
(Place Web Order)

A note regarding email addresses: When checking out please use an email adress other than @earthlink.net, @hotmail.com, @live.com, @msn.com, @outlook.com. For some reason these domains reject email from tapr.org
ALSO There is a problem with Chrome inaccurately reporting that the connection is insecure when you are attempting to complete your order. We suggest using a different browser to place the order.
Both problems are being worked on, sorry for the inconvenience.

Shipping and Handling

Shipping and Handling within the US will be by USPS Priority Mail.

International shipping costs are calculated as closely as possible. If the actual cost exceeds the estimate by more than $10.00, TAPR will contact you to get approval for the additional funds. TAPR uses insured Priority Mail International, unless the purchaser requires something else.

Ordering Information

The price for the TASS-R is:

  • $ 119 US for members of TAPR

  • $ 119 US for non-members

    + shipping/handling if applicable.
(Place Web Order)

A note regarding email addresses: When checking out please use an email adress other than @earthlink.net, @hotmail.com, @live.com, @msn.com, @outlook.com. For some reason these domains reject email from tapr.org
ALSO There is a problem with Chrome inaccurately reporting that the connection is insecure when you are attempting to complete your order. We suggest using a different browser to place the order.
Both problems are being worked on, sorry for the inconvenience.

Shipping and Handling

Shipping and Handling within the US will be by USPS Priority Mail.

International shipping costs are calculated as closely as possible. If the actual cost exceeds the estimate by more than $10.00, TAPR will contact you to get approval for the additional funds. TAPR uses insured Priority Mail International, unless the purchaser requires something else.


Documentation


Acknowledgments

The TASS project team is:

  • John Ackermann, N8UR, project manager, designer
  • Bob Camp, KB8TQ, design contributor
  • Tom Holmes, N8ZM, design contributor
  • John Koster, W9DDD, kitting

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