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Quadrature
Encoder
Cards
&
Software

...simple as a laptop.

Data Acquisition & Control
  • Free 30-Day evaluation.
  • No special drivers required.
  • No need to access internal card cages.
  • Use up to 32 cards on a single RS-232 or USB port.
  • Mix and match the cards to provide any combination of features.

Digital Input Module
WTDIN-M
4 high speed input channel pairs which can track the position of 4 quadrature encoders simultaneously, and store a count value up to 16,777,215 each. Also includes 2 digital output channels.
Only $89       read more...
Digital Output Module
WTDOT-M
1 high speed input channel pair that can track the position of a quadrature encoder and store a count value up to 16,777,215. Also includes 8 digital output channels.
Only $99       read more...
Pulse Counter/Timer Module
WTPCT-M
1 high speed input channel pair that can track the position of a quadrature encoder and store a count value up to 16,777,215. Can also read Frequency, Period, or Duty Cycle.
Only $89       read more...

 

 

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Weeder Technologies Quadrature Encoder cards with free Window's software

To track the position of a rotating shaft an absolute quadrature encoder sensor is used which in many cases incorporates an optical photo detector circuit or hall effect circuit to sense the rotation. Also called an incremental shaft encoder, or rotary encoder, these sensors output a pair of square waves which are 90 degrees out of phase allowing the rotational direction of the shaft to be detected as well as the degree of movement. Our small low-cost counter/timer cards which plug into the RS-232 or USB port of a computer contain specialized circuitry to interface with and decode these pulse streams. Software running on the computer will then be able to track the shaft rotation on a continuous basis.