Tact1 Tactile Sensor Mount Kit

USD $2.60

This clever "spring-in-loop" sensor configuration is a well-proven touch-sensor for small to medium size robot applications

In stock (can be backordered)

SKU: 60175 Categories: , , Tag:


We've been using a variation of this sensor method for many, many years with great success, and have been asked more than once for a kit. So, here's a quicky we put together.

The Tact-1 tactile touch sensor uses a custom-manufactured nickel-plated spring as a deflection sensor. Bend it beyond a threshold, and it touches the ring surrounding it, creating a signal. You can apply force to the sensor from nearly any angle to get useful "I've bumped something!" feedback.

The originals were constructed using guitar or bass strings and paperclips, hand-soldered to spare circuit boards. This design features simple, easy-to-adjust construction.

Variations of this sensor have been built by scaling the concept up or down. The largest used wire-cable guides from a car throttle mechanism, and the smallest used fine wire built in a vertical array. This small one was used in an interesting experiment to build a "Reactive Maze Solving Robot with Biologically-Inspired Wind Sensor", built by Mark Tilden at the Telluride Biomorphic Workshop in 1999. It used wind currents hitting this sensor array to sum wind direction and direct a Khepera robot (affectionally refered to as the "Rastabot").

Other variations of this sensor have been used for full-perimeter detection, by anchoring the free end of the sensor around to the far side of the robot, creating a full bumper rather than an antenna. It's a very versatile sensor!


  • Simple, robust design used on hundreds of robots
  • Built-in 10k pull-up resistor
  • Digital (yes/no) signal
  • 3-wire communication (Gnd, Signal, optional Vcc)


  • 15cm (5.9") nickel plated sensor spring
  • 4-40 mounting hardware included

Note: This kit builds one sensor (not a pair)

Additional information

Weight 0.0053 kg
Dimensions 2 × 1.5 × 0.5 cm


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Warning: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
Please visit www.P65Warnings.ca.gov for more information. This item was manufactured prior to August 31, 2018.

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