Reed Relays and
Electronics India Limited
Manufacturer of Reed Switches, Reed Sensors and Reed-based products
Reed Relays and Electronics India Limited Incorporated in 1971

Notebook computers Sleep Functioning using Reed Sensors

Notebook computer
Notebook Computer

Notebook computers and Netbooks are part of personal life. Screen time on these devices is anywhere between 2 and 6 hours and this too when on the move, with minimal charging. To be energy efficient to the maximum, simple functions such as the closing of the screen or a case should cut off supply to the screen and change the Notebook Computer’s state to a power saving or sleep mode.

Due to the extremely competitive market of Notebook Computers and digital devices, manufacturers need to come out with thinner and smaller models every year and are embedding batteries permanently into the enclosure with no option to have them changed. Furthermore, components being used on such circuits also need to be energy efficient to ensure maximum battery life. The simple motion of closing the screen on a notebook computer should instantly put the device in sleep mode and save battery.

Reed Switch and reed-based sensors are inherently energy saving devices as they do not require power for operation and can reliably switch extremely low current signal loads in the range of few femto-amps. Even when the sensor is in an actuated state, the resistance across the contacts is so low in the order of a few milli-Ohms, that unnecessary battery drain is avoided.

All one needs is a reed sensor mounted on the control circuit with a tiny rubber or plastic magnet on the screen. The Reed Sensors is triggered when the screen is closed and this enables the sleep function.

Application Classification

Applications are classified as Position Sensing, Pulse Counting, Electromagnetic or Relay, Temperature Sensing or Magnet Biasing types. This application is classified as follows and the link gives more information on best practices to help select the most suitable AT band and matching magnet.

Position sensing Type
Position sensing Position Sensing type application When an application requires the end position of a movement sensed, or the sensing of a part when it Continue reading ->

Feb 28, 2024

The Reed Switches and Sensors used in such applications need to be robust, durable and efficient in meeting a high life expectancy. Our engineers work hard in life testing our products under various conditions, and our intention is to ensure end product durability and life. Although we wouldn’t want to restrict any of our products for use in only certain applications, the recommended products for use in this application are listed below.

UM-0018-M Ultra Miniature Reed Switch
Ultra Miniature Reed Switch Size 5 mm This highly sensitive, Form A type, UM-0018-M Ultra Miniature Reed Switches are designed for switching high speed signal loads with an Continue reading ->

Nov 8, 2022

R3 Miniature SMD Reed Sensor
Miniature Reed Sensor These miniature SMD reed sensors are designed for low power, high speed switching applications, and have a cost advantage over the Continue reading ->

Jun 7, 2021

R2 Standard size SMD Reed Sensor
Standard Size Reed Sensor R2-S Gull-wing SMD Formed Reed SensorR2-S Gull-wing SMD Formed Reed Sensor Pad LayoutR2-F Low Profile SMD Formed Reed SensorR2-F Low Continue reading ->

Dec 2, 2020

RM-1318 Reduced Miniature Reed Switch
Reduced Miniature Reed Switch Size The RM-1318 Reduced Miniature reed switches are designed for applications where a size restriction is present, but a higher Contact Continue reading ->

Nov 8, 2022