HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Feature
Electronics & Test

Reed Relays Switch in Time

NO RATINGS
View Comments: Newest First|Oldest First|Threaded View
Jon Titus
User Rank
Blogger
Reed relays reconsidered
Jon Titus   7/1/2011 11:55:46 AM

John Beigel, a consultant for MEDER electronic, a manufacturer of reed relays, took exception to my reed-relay bounce-time data, obtained from a Keithley Instruments handbook, and responded, "The vast majority of reed relays are single pole single throw (SPST) normally open contacts. The majority of the contacts close completely in approximately 0.5 milliseconds. This includes bounce. Bounce typically lasts about 100 to 150 microseconds. On new reed relays the operate time is typically 100 microseconds max with a bounce time of 50 microseconds maximum. The bounce time called out by Mr. Titus--'a few milliseconds'--is simply not true."

 

I obtained sample relays from MEDER and measured relay-bounce times of about 50 microseconds.  But other electro-mechanical characteristics as well as test-and-measurement applications also govern the use of relays.  Read my follow up column set for the August 2011 issue of Design News. --Jon Titus



Partner Zone
Latest Analysis
As more electric cars and plug-in hybrids hit the highways, the need for battery chargers is growing.
Festo is developing small wind turbines for generating power to buildings. The model for the mini wind devices is the seagull wing.
MIT students modified a 3D printer to enable it to print more than one object and print on top of existing printed objects. All of this was made possible by modifying a Solidoodle with a height measuring laser.
A battery management system to support an electric motorcycle lithium-ion battery pack took first place in Texas Instruments' annual engineering innovation contest.
This Gadget Freak Review looks at a keyless Bluetooth padlock that works with your smartphone, along with a system that tracks your sleep behavior and wakes you at the perfect time in your sleep cycle to avoid morning grogginess.
More:Blogs|News
Design News Webinar Series
7/23/2014 11:00 a.m. California / 2:00 p.m. New York
7/17/2014 11:00 a.m. California / 2:00 p.m. New York
6/25/2014 11:00 a.m. California / 2:00 p.m. New York
5/13/2014 10:00 a.m. California / 1:00 p.m. New York / 6:00 p.m. London
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Aug 18 - 22, Embedded Software Development With Python & the Raspberry Pi
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Next Class: September 30 - October 2
Sponsored by Altera
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2014 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service