{"product_id":"2-channel-smart-dual-coil-latching-relay-board-2-channel-bistable-relay-module","title":"2 Channel Smart Dual Coil Latching Relay Board – 2 Channel Bistable Relay Module","description":"\u003cp\u003eThis is a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eSmart Dual Coil Latching Relay\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ethat can control the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eON\/OFF\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003epower of a device by applying a short voltage pulse to\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eInput 1\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eInput 2\u003c\/strong\u003e. This project is helpful in low-power applications since the coil is not powered all the time, it only requires a short voltage pulse. Relay Coil also remains in that position even if the power is disconnected. Polarized, bi-stable, latching relays are utilized in many kinds of electronic equipment and diverse applications. These relays usually employ two coils, one to move the relay contacts(s) from the open to close position and another coil to move the contacts(s) from the close to the open position.  to facilitate mechanical movement, the relay coils need to be energized for a specific time interval. Once the contact(s) have changed position, the voltage should be removed from the winding of the relay. As shown in the schematic, a dual-coil relay is connected to its supply rail at the center point of the two relay windings Each winding can be energized by applying a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eTTL-short\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003epulse to input A1, A2, B1, and B2. Diode D6, D7, D8, and D9 are used as clamping diodes. Operation is very simple, apply a minimum 150mS-500mS trigger voltage to input A1\/B1, this will energize relay coil -1 and the coil moves contact(s) open to close, and when the pulse applies to input A2\/B2, coil-2 energized and moves the contact(s) from close to open. All inputs can be triggered using push switches, Arduino\/microcontroller and other circuits, applying\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e150mS to 500mS\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eTTL pulse will energize the coil.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSupply 12V DC @ 60mA\u003c\/li\u003e\n\u003cli\u003e4 x Inputs to trigger Relay Contacts\u003c\/li\u003e\n\u003cli\u003eRelay Contacts Current Load 16A Maximum\u003c\/li\u003e\n\u003cli\u003ePCB Dimensions 54.61 x 44.45mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eConnectors\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eConnector CN1\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003ePin1: VCC 12V DC @ 40mA\u003c\/li\u003e\n\u003cli\u003ePin2: Relay 1 Coil-1 A1 Trigger Input\u003c\/li\u003e\n\u003cli\u003ePin3: Relay 1 Coil-2 A2 Trigger Input\u003c\/li\u003e\n\u003cli\u003ePin4: Relay 2 Coil-1 B1 Trigger Input\u003c\/li\u003e\n\u003cli\u003ePin5: Relay 2 Coil-2 B2 Trigger Input\u003c\/li\u003e\n\u003cli\u003ePin6: GND\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector CN1:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eRelay 1 Connections Open, Common, Closed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector CN2:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eRelay 2 Connections Open, Common, Closed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLED D1, D2, D4, D5\u003c\/strong\u003e: Relay Operations\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLED D3:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ePower LED\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"dotfry","offers":[{"title":"Default Title","offer_id":47171147464876,"sku":"B107","price":28.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0757\/6436\/7532\/files\/B107A.jpg?v=1789028994","url":"https:\/\/dotfry.com\/products\/2-channel-smart-dual-coil-latching-relay-board-2-channel-bistable-relay-module","provider":"dotfry","version":"1.0","type":"link"}