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Wireless Temperature Sensing Example

  • 24 March 2014
    • Temperature Warning System Diagram
We recently released a new example application for the Haptic Feedback Evaluation Kit, a temperature monitoring system that would play a haptic effect when a sensor in a remote location sent a wireless warning signal to the kit. Read the guide here! In our imaginary situation we pictured somebody being in a dangerous environment, perhaps something like a fire-fighter, who would need to be warned when the ambient temperature was getting too high. As the sensor was transmitting signals…

5 Methods of Circuit Protection for Gearmotors Part 2

  • 20 March 2014
    • Low Side Current Sensing
Note: this is the second of two posts, continuing on from this post. 3) Use a current shunt monitor Current shunt monitoring takes two forms; high side and low side current sensing, each with their own advantages/disadvantages, and each available as analogue or digital output devices. Current shunt monitor ICs work by carefully monitoring the voltage drop over a low value resistor that is placed in the current path. An example of such a monitor is the INA170. Low…

5 Methods of Circuit Protection for Gearmotors Part 1

  • 3 March 2014
    • Torque Testing Machine
Note: this is the first of two parts looking at limiting current for gearmotors, our next post will complete the article. Our gearmotors are frequently used to drive a variety of industrial mechanisms, such as linear actuators or pulleys. A common design consideration in such applications is circuit protection of the motors. If an actuator reaches its mechanical limit or there is a fault with the mechanism, the gearmotor will keep on trying to turn even if it can’t.…

What Vibration Frequency is Best for Haptic Feedback?

  • 27 February 2014
    • Different mechanoreceptors have different frequency ranges
We should preface this blog post with the disclaimer that we are not a collection of biomedical engineers and that the details below are based on our own experience and our customer feedback! Having said that, we are often asked what vibration frequency is best for haptic feedback devices. The enquiry is looking at which of our actuators operate at the frequency our skin is most receptive to. So of course we should begin with a discussion of where…

Reading the Motor Constants from Typical Performance Characteristics

  • 2 February 2014
    • Motor constants can be calculated from the datasheets
DC motor constants can be a confusing world, there’s a lot of differing information and relationships can be difficult to figure out due to inconsistent naming and units. You shouldn’t need to find the constants for our vibration motors, they already have a fixed load and all the pertinent information like vibration amplitude and frequency is available on the datasheets you can download from our Product Catalogue. However you may want to know the constants for our DC motors…

308-103 Released - High Vibration Amplitude ERM

  • 13 November 2012
    • 308-103 High Amplitude ERM Vibrating Motor
Here at Precision Microdrives we have released a new high amplitude eccentric rotating mass vibration motor, the 308-103. Built from a high torque 3 V DC motor, the 308-103…

High Vibration Long-Life Brushless Vibration Motor : 912-101 Released

  • 16 July 2012
    • 912-101 Brushless Vibrating Motor
We have released a new brushless vibration motor, our first in a cylindrical form factor. Brushless vibration motors have a significantly improved lifetime over the commonplace ‘brushed’ vibration motor…

Our First Horizontal Linear Resonant Actuator (LRA) for Haptic Feedback : C13-000

  • 23 April 2012
    • C13-000 Linear Resonant Actuator
Update: Unfortunately we are no longer able to offer the C13-000 horiztonal LRA, please use the contact form below to enquire about a suitable replacement. Our latest Linear Resonant…
  • 308-103 ERM Vibrating Motor Ad
  • Product Release :: 308-103
  • New high amplitude eccentric rotating mass vibrating motor. Strongest sub-12mm vibration motor available!