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Using Haptic Drivers as Battery Level Monitors

  • 19 August 2015
    • Component count can be extremely important for wearable devices
Reducing power consumption is one of the most important aspects of designing a device that is powered by batteries. This means there is a great incentive to keep the component count to an absolute minimum, especially active components which draw small amounts of current even when in 'sleep' mode. One of the most common ways to achieve this is to use chips that combine multiple functions, the term SoC or 'System on Chip' is often used. This works particularly…

DC Motor Speed: Voltage and Torque Relationships

  • 3 August 2015
    • Typical DC Motor / DC Gearmotor Performance Characteristics (The 108-104 DC Motor)
Something we have discussed in the past is how varying the voltage to a vibration motor can change the amplitude, particularly with reference to haptic feedback and playing different effects. However, something we haven’t explicitly shown is why this happens, or discussed it in the context of a normal DC motor. So in this short article, we will demonstrate how an increased voltage will increase the speed and an increased load will decrease the speed of a motor. It…

A Change on Datasheets: Torque Becomes Load

  • 21 July 2015
    • Rated Torque has been updated to Rated Load
You may have noticed a recent change on our datasheets and in some sections of our website, relating to how we qualify our DC motors and gearmotors. The previous value of ‘Rated Torque’ has been replaced with ‘Rated Load’ (see bottom left in the image above). It is important to recognise these parameters represent the exact same value. Although it’s a small change, we believe it makes some of the technical values easier to understand. Our motors undergo a…

VAB-03 Released : How Do LRAs Work?

  • 3 July 2015
    • VAB-03 : How Do LRAs Work?
Video Application Bulletin 03 rounds off our introductions to our 3 most popular product lines by covering Linear Resonant Actuators. We appreciate LRAs are a more difficult concept than ERMs, so hopefully this video should address some of the most common questions. The video is embedded below, but for our email subscribers you can access the video on precisionmicrodrives.com here, or directly on our Vimeo page. Remember, the video acts as a quick overview - so you may have…

Gravity Light's Unique Use of Motors to Create Lamps

  • 16 June 2015
    • Gravity Light generates fuel-free lighting
The Concept Recently we were contacted by the GravityLight™ team regarding a very interesting project they are working on, an alternative to kerosene lamps that is powered only by gravity. Kerosene lamps are still commonly used in the developing world, despite the numerous financial and environmental repercussions. The concept of the GravityLight is elegantly simple. A weight is manually raised and as it falls it turns the shaft of an electric motor via a gearbox, creating a voltage across…

C10-000 Released : 205 Hz 10mm LRA

  • 31 August 2015
    • C10-000 is 205 Hz Resonant Frequency, 1.4 G
The new C10-000 serves as a higher frequency alternative 10mm linear resonant actuator to the extremely popular Precision Microdrives C10-100. They are similar models, but the C10-000 has some…

908-100 Released : New 8mm Brushless Vibration Motor

  • 11 August 2015
    • 908-100 8mm Brushless Vibration Motor
At Precision Microdrives we recently added the 908-100 brushless vibration motor, part of the Dura Vibe™ range, to our online product catalogue. At only 8mm this is our smallest…

C08-001 Released New 8mm LRA Available

  • 30 July 2015
    • The 8mm LRA C08-001
At Precision Microdrives we are excited to announce our smallest linear resonant actuator to date, the C08-001. This LRA is only 8mm in diameter and just 3.2mm in height,…
  • 308-103 High Amplitude ERM Vibrating Motor
  • Product Release :: 308-103
  • New high amplitude eccentric rotating mass vibrating motor. Strongest sub-12mm vibration motor available!