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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…

Haptic Touchscreen Example Application

  • 13 October 2014
    • Haptic Touchscreen Example Application
We are seeing a wide range of manufacturers implementing touchscreens in their products. Whilst they've been commonplace in the mobile arena for some time, now products like various whitegoods, information kiosks, printers and even industrial CNC machines are replacing dials and buttons. Adding haptic feedback to touchscreens is very simple, we outlined some mounting options in Application Bulletin 014 : Mechanical Layout of Vibration Motors for Typical User Interfaces and Controls. To compliment the mounting guide, we’ve added a…

AB-025 Released : Using SPICE to Model DC Motors

  • 2 October 2014
    • Basic electrical and mechanical equivalant of a DC motor
Our latest Application Bulletin walks through modelling DC motors in SPICE. For those unfamiliar with SPICE, it’s a very popular open source program designed to let you build and simulate electrical circuits. It’s widely used by students and professionals, but as with all software it requires some basic knowledge to get the most from it. So in this AB we’re explaining how to model DC motors. We don’t just cover basic DC motors, but also vibration motors and gearmotors.…

AB-024 Released : Introductory Gear Equations

  • 18 September 2014
    • A gear of 60 teeth attached to a 16 teeth gear reduces the speed by 3.75
Our latest application bulletin is slightly less challenging than some recent releases, but tackles a topic which generates a lot of support requests - how to calculate speed and torque in gear chains. We carry a wide range of gearmotors, but there are obviously instances where creating your own custom gearing is required. Perhaps you already have a DC motor, or can’t find a gearmotor that exactly meets your specification. This application bulletin provides you with the necessary equations…

Rugged Piezoelectric Passcode Haptic Example

  • 26 August 2014
    • A Piezoelectric Sensor
We've written a new example application for the Haptic Feedback Evaluation Kit. Piezoelectric sensors can be used for a variety of applications, but we chose to look at using them for touch buttons. They're great because they don't get damaged as easily as normal contact switches (such as from moisture or dust), but they lack the tactile response of a physical button. So we used our Haptic Feedback Evaluation Kit to develop a simple passcode system. Using 3 piezo…

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…

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