![]() Molded frame – Relays are covered with plastic for protection. .Normally close – not connected when the relay is activated, and connected when it is inactive.ĥ. .Normally open – connected when the relay is activated, and disconnected when it is inactive. Set of electrical contacts – There are two contact points: Spring – When no currents flow through the coil on the electromagnet, the spring pulls the armature away so the circuit cannot be completed.Ĥ. And the armature can be moved with direct current (DC) as well as alternating current (AC).ģ. When current flows through them, the coil is it energized thus producing a magnetic field which is used to make or break the normally open (N/O) or normally close (N/C) points. Armature – The movable magnetic strip is known as armature. When electricity is passed through, it becomes magnetic. Electromagnet – It consists of an iron core wounded by coil of wires. The working of a relay can be better understood by explaining the following diagram given below.ġ. This relay module could be considered like a series switches: 1 normally Open (NO), 1 normally closed (NC) and 1 common Pin (COM). SIG – Controls relay, you can select high level active or low level active through the jumper on the pcb board.It has a 1*3(2.54mm pitch) XH2.54 header for connecting power (5V and 0V), and for controlling the relay. High current relay, AC250V 10A, DC30V 10A.Very useful project for application like Micro-Controller based projects, Remote controller, Lamp on Off, and any circuits which required isolated high current and high voltage switching by applying any TTL or CMOS level voltage. It can be controlled directly by Microcontroller (Raspberry Pi, Arduino, 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL logic). This is a 5V 1-Channel Relay Module board, Be able to control various appliances, and other equipment with large current. Osoyoo UNO Board (Fully compatible with Arduino UNO rev.3) x 1.Note: In this lesson, we set the relay module to be active high Preparations Hardware ![]() ![]() In this lesson, we will show you how the OSOYOO Relay Module works and how to use it with the Osoyoo Uno board to control high voltage devices. Relays are used where it is necessary to control a circuit by a separate low-power signal, or where several circuits must be controlled by one signal. Many relays use an electromagnet to mechanically operate a switch, but other operating principles are also used, such as solid-state relays. A relay is an electrically operated switch.
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