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Why Use 'Maximum' Start Voltages?

  • 22 December 2014
    • Start Voltage Example
You can use the voltage to adjust the speed of a motor, commonly with vibration motors this is used to vary the vibration amplitude. But just how low can the voltage be whilst ensuring the motor still operates? We previously included the Certified Start Voltage on our datasheets. This has since been updated in the Operational Specification to the 'Maximum Start Voltage'. This change has confused some customers who question why we have a 'maximum' value, instead of a…

New Haptic Feedback Evaluation Kit Tutorial: Vibration Alerts on External Actuators

  • 10 December 2014
    • Haptic Feedback Evaluation Kit external PWM connection
The external actuator pins Haptic Feedback Evaluation Kit is designed to provide a true a connection to the DRV2605 as possible. Unfortunately as a design trade-off, this means the MOSFET used to play vibration alerts is not accessible through the pins. We've recently written a new tutorial that discusses how to work around this limitation, so you can now build your own vibration alerts in Engineering Mode or Development Mode and play them on your chosen external actuator. The…

AB-027 Released : Eccentric Mass Parameters for Vibration Motors

  • 18 November 2014
    • Parameters for a disc segment
How are we able to achieve different profiles and characteristics in ERM vibration motors? Well, given we know the vibration force is based upon the formula below, there are two parts that we can customise: #tex:F = m \times r \times \omega^{2}# The easiest is changing the DC motor, where different torque and speed constants will inevitably impact on the angular velocity, ω, leading to different vibration strengths and frequencies. However we can also see that the eccentric mass…

Vibration Motors Used to Combat Bruxism

  • 6 November 2014
    • bruXane® - The coin vibration motor is mounted on the reverse of the PCB
bruXane GmbH are a German based company working to develop a product that prevents excessive grinding of teeth. We take particular interest in their application because they use our vibration motors! The technical name of the activity is ‘bruxism’, which can occur whilst sleeping or awake and can cause a range of problems including tooth wear, a sore jaw, and headaches. Many ‘bruxers’ are unaware that they are ‘bruxing’, which can continue throughout the entire night if they are…

AB-026 Released : Sensorless Speed Stabiliser for a DC Motor

  • 24 October 2014
    • Precision Microdrives 132-100 PCB with AN6651
Achieving a constant speed for a DC motor with a varying load is a difficult task. For miniature DC motors, this was a common issue faced by manufacturers of tape players - the motor would see a range in torque as the tape moved between spindles. The problem is often solved with some form of sensor of the motor shaft, like an encoder, and a control loop. However, it's not a suitable solution for all designs - extremely small…

307-103 Released High Amplitude Encapsulated Vibration Motor

  • 20 January 2015
    • 307-103 Encapsulated Vibration Motor
At Precision Microdrives we have extended our range of encapsulated vibration motors with the new 307-103 Pico Vibe™ 9mm vibration motor. The 307-103 is a very powerful vibration motor,…

304-015 Released - Ultra Low Current SMD Vibration Motor

  • 16 October 2014
    • 304-015 Low Current SMD Vibration Motor
Precision Microdrives are introducing a new ultra-low current SMD vibration motor, designed to vibrate lightweight products as efficiently as possible. The 304-015 is available in production quantities and with…

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…
  • 308-103 ERM Vibrating Motor Ad
  • Product Release :: 308-103
  • New high amplitude eccentric rotating mass vibrating motor. Strongest sub-12mm vibration motor available!