We will use 4 LEDs, depending on the level of light that we capture with the LDR sensor.
We also need a 100ohm pull-up resistor connected to the same pin to allow a controlled flow of current to the digital input pin. The switch will be initiated when there is a presence of the magnetic field around the switch. Connecting Reed Switch with Arduino is very simple.
Project showcase by Team The Instrumentation Crustaceans. If contracts are open, there is no electrical contact. Pair of ferrous metal contacts. Therefore we want to display the switch cycles to the serial output of the Arduino IDE. The microcontroller reads the analog value of the reed switch and prints it to the serial output.
3. But the KY-025 has a build in LED with the same functionality.
Let's make a neat one! There is also the magnetic hall sensor. Utilized in the telephone exchange . Did you make this project? Arduino Reed Switch: Hello everyone!The Reed devices are electronic or electromechanical components that work using the technology of the reed contacts, realized for the first time by the Bell.The Reed contact switch is a lamina (normally open) which closes in the prese… Reed switch is used in many of the real-life applications such as magnetic door switch, laptops, smartphones etc. The following pictures show the wiring.
We are using a normally open reed switch in this project. This time for the KY-021 Mini reed switch. In laptops to set the screen on sleep if the lid is closed. The following video shows how I place the magnet in distance to the reed switch and tune the potentiometer that the LED is turned on by this exact distance. It is made up of two small metal pieces managed inside a glass tube under a vacuum. 1. Magnet has to be perpendicular to magnetic hall sensor, Reed Switch KY-025 and KY-021 in Sensor Pack, Has moving parts that are not able to operate over frequencies greater 10 kHz, Switch has debouncing effect like all switches, 0 for the threshold is not exceeded (build in LED is off), 1 for the threshold is exceeded (build in LED is turned on). Therefore we take a look in the wiring between the reed switch and the microcontroller. In the following sections, we want to measure the magnetic field with both, the KY-025 and the KY-021. Switch is closed in the presence of magnetic field and it is open in the absence of magnetic field. Therefor we do not need an extra LED. To interface reed switch with Arduino, we require to develop a voltage divider circuit. When you buy this switch, it also comes with 4 screws, so that you can attach it to your door. To interface reed switch with Arduino, we require to develop a voltage divider circuit. In a digital setup I usually use a LED to display the exceeded threshold. The following program code reads the digital value of the module and prints. There are two reed switch modules on the market. We are using a usually open reed switch in this project. To interface reed switch with Arduino we need to build a voltage divider circuit as shown in the figure below.
Vo is +5V when the switch is open and 0V when the switch is closed. In the following table you find the comparison between the two magnetic switches with the advantages and disadvantage and also how the magnet – sensor orientation has to be. Arduino Uno-- We'll be using a digital pin on the Arduino to read the state of the switch. Please copy the following code and upload it to the arduino Board : How to control your light switch from your smartphone. Reed switches are magnetically-actuated electrical switches which switch based on a magnetic field. To interface reed switch with Arduino we need to build a voltage divider circuit as shown in the figure below. In this tutorial we learned how a magnetic switch is used to build a security system for doors or windows for example. As an Amazon Associate I earn from qualifying purchases. The sketch is pretty straight forward.
The sketch is pretty straight forward. In this setup the magnetic field has a dead zone in the middle of the reed switch. Yep yep, I made another simple project. For some use cases there is no difference if you use a reed switch or a magnetic hall sensor. Share it with us! If magnetic field through a magnet or a strong electrical current is present to the reed switch, the connection inside the switch closes and the circuit is closed so that a current flow is present. Reed switch is used in many of the real-life applications such as magnetic door switch, laptops, smartphones etc.
Voltage is +5V when the switch is open and 0V when the switch is closed. I only added the part that the external LED is turned on and off depending on the strength of the magnetic field. The following pictures show the wiring between the KY-025 and the Arduino and NodeMCU for the analog connection. We also need a 100ohm pull-up resistor connected to the same pin to allow a … Reed switch is used in many of the real-life applications such as magnetic door switch, laptops, smartphones etc. Therefor we have to read the analog values and tune the potentiometer that we exceed the threshold in case of that specific value. Magnet-- You'll need something to actuate the reed switch, and this small magnet should fit the bill. Any Arduino-compatible development platform -- be it a RedBoard, Pro or Pro Mini-- can substitute.
You can find further information on this under, Reduce the ESP32 Power Consumption in 3 Simple Steps, MQ2 Gas Sensor Tutorial for Arduino, ESP8266 and ESP32, Fire Sensor Tutorial for Arduino, ESP8266 and ESP32, SD Card Tutorial for Arduino, ESP8266 and ESP32.
On the left side the magnet is parallel to the reed switch and in the right picture, the magnet is perpendicular to the magnetic switch.