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AB-029 Released : Vibration Motors - Voltage vs Frequency vs Amplitude

  • 27 March 2015
    • Results from our haptic feedback testing
Our latest Application Bulletin attempts to draw together some of our existing content and puts a much more practical emphasis on how the voltage directly affects the vibration amplitude and frequency of ERM motors. Regular readers and email subscribers may be familiar with all of the concepts, but hopefully we've been able to help clarify some aspects of the relationships. It will also provide as an excellent 'go-to' reference when discussing the topic with colleagues, particularly is they're not…

AB-026 Updated - One last method for sensorless speed stabilisation

  • 16 March 2015
    • Motor speed control using back EMF in switching mode analogue circuit
AB-026 has been updated to include one further method for stabilising DC motor speed, with out the use of external sensors. This final method uses a 'Sample and Hold' circuit to store the value of the motor's back EMF - which is proportional to the motor speed. Comparing this value with the desired speed (set with potentionmeters) we are able to adjust the PWM duty cycle to form a control loop. Although this method is not suitable for motors…

Arduino IDE 1.6.0 Updated Code for Haptic Feedback Evaluation Kit

  • 25 February 2015
    • Arduino 1.6.0 PROGMEM Errors
Attention users of the Haptic Feedback Evaluation Kit! Recently Arduino released the latest version of their IDE, version 1.6.0, which has several changes that affect the Modes of Operation that we provide. Specifically, the Arduino IDE is now in-line with the newer AVR GCC. The compiler (GCC) for the microcontroller in the Arduino UNO R3 (AVR based microcontrollers) handles PROGMEM statements differently, you can see the errors in the image below. The full Arduino release notes can be read…

AB-028 Released : Vibration Motor Comparison Guide

  • 24 February 2015
    • Different Types of Vibration Motor
Our latest Application Bulletin provides a quick reference for comparing different types of vibration actuators. We've included brushed ERMs, BLDC ERMs, and linear resonant actuators, discussing their most important differences. From driving techniques to vibration direction, or form factors to mounting advice. It draws from lots of our existing content, but houses it in a single place and emphasises the design decisions that set each type apart. All the differences are summarised in an easy access table at the…

VibroMat Application and Research

  • 3 February 2015
    • Full Colour; 8 bit Grayscale; 1 bit Grayscale
We’ve recently been in contact with one of our customers at the National ICT Institute of Australia (NICTA) who have been using our coin vibration motors in their research. The team is working on a project called VibroMat, which looks to present a “2D view of the world” using an array of vibration motors to users with visual impairment. In total 96 vibration motors are used to translate complex visual information into tactile information as a form of ‘sensory…

304-121 Released : Low current PCB through-hole vibration motor

  • 30 March 2015
    • 304-121 PCB through-hole vibration motor
At Precision Microdrives we have recently introduced the 304-121, a new PCB through-hole vibration motor specifically designed for low current operation. With a Typical Vibration Amplitude of 1.05 G…

210-101 and 210-200 Released - 10mm Spur Gearmotors 100:1

  • 13 March 2015
    • 210-101 and 210- 200, 250:1 10mm Gearmotors
Here at Precision Microdrives we’ve released two new 10mm spur gear motors (a 3 V version and a 6 V version) - both with a torque of 10 mNm…

210-101 and 210-200 Released - 10mm Spur Gearmotors 250:1

  • 12 March 2015
    • 210-102 and 210- 201, 100:1 10mm Gearmotors
To go alongside our new 3 and 6 volt 100:1 10mm gearmotors, we at Precision Microdrives have also released similar 250:1 variants - with a higher torque of 25…
  • 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!