Reed Switch Sensor Circuit

A reed switch switches a current on the same way but a magnet provides the pushing pressure instead of your finger.

Reed switch sensor circuit.

What problem do reed switches solve. A reed switch is a very basic 2 lead switch that is switched on by a magnet being brought into the vicinity of the switch. There are normally open reed switches and normally closed reed switches. However reed switches can be fragile to use directly hence this module can make it easier to handle and mount the sensor in various applications.

The reed switch is an electrical switch operated by an applied magnetic field it was invented at bell telephone laboratories in 1936 by walter b. How to build a reed switch circuit. There are 2 basic types of reed switches. Simply put it is a magnetic switch.

In case a capacitor is connected in series or in parallel with a reed switch in a closed circuit the inrush current which flows during charge and discharge of the capacitor will cause deterioration of the reed contacts. The pcb tracks can be designed in such a way that a full tank gives high resistance and an empty tank gives low resistance or vice versa. In its simplest and most common form it consists of a pair of ferromagnetic flexible metal contacts in a hermetically sealed glass envelope. A spring makes it pop back out again when you take your finger away.

A push to make switch makes a connection and completes a circuit when you push it in. Reed switches and reed sensors are used along with resistors or special reed sensors with integrated resistor to give out a potentiometric feed back across two outputs as a foamed magnetic float moves along the pcb s length. The contacts are usually normally open closing when a magnetic field is present or they may be.