IntroductionThis is a 4-channel optpcoupler-isolated relay Arduino UNO Shield, capable of controlling high-power devices operating at AC 240V 5A or DC 24V 5A for each channel.In a home automation project, relay modules play a crucial role in managing devices such as lights, pumps, garage doors, speakers, power outlets, and fans. However, traditional relay modules are burdened by space requirements, intricate wiring, and a potential for unreliable operation. Moreover, low-quality relay modules lacking optocoupler isolation compromise the safety of the entire project.By adopting the Arduino Shield approach, this product not only eliminates the need for complex wiring but also provides a substantial boost to project reliability. Through the integration of a 4-channel relay, it enables an Arduino UNO mainboard to exercise comprehensive control over a diverse range of devices.4 Channel Relay Shield for ArduinoFurthermore, this expansion board boasts an XBee interface in addition to 14 3-pin digital ports and 6 3-pin analog ports. With the inclusion of the XBee interface, users have the freedom to integrate wireless modules like Bluetooth, WiFi, or Zigbee, unlocking a realm of advanced capabilities such as IoT integration, seamless smart home integration, convenient mobile control, and efficient coordination among multiple devices.Arduino Uno Relay Shield Boasts an XBee InterfaceWith its 4-channel optocoupler isolation and independent power supply features, this relay expansion board effectively isolates the electrical connection between AC and DC, guaranteeing the utmost electrical safety. This meticulous design effectively eliminates any potential electromagnetic interference, thereby safeguarding the Arduino mainboard from the perils of high-voltage electrical signals and mitigating the risk of damage.FeaturesCompatible with Arduino UNO Rev3Each Relay has its own test button to test the connectionStandard DFRobot 3 Pin outXBee I/O direct controlSpecificationCompatible with Arduino UNO Rev34 buttons to test moduleLED status indicator of relaySupport Xbee IO directly controlXbee socket for wireless communicationSelectable digital IO pin for control (Default digital 2,7,8,10) 6 channels Analog IO & 13 channels Digital IO Up to 4 Relay with photo-coupled circuitContact Rating 3A AC 120V / DC 24VMax Switching Voltage AC 240V / DC 60V (Less than 38V is recommended)Max Switching Current 5AMax Switching Power AC 360VA / DC 90WElectrical Life (Min) 100,000 OperationsMechanical Life (Min) 10,000,000 OperationsSafety Standard(relay) UL cUL TUV CQCCoil Working Voltage 9VDCWorking temperature -30℃ to +85℃Working Humidity 40% - 85%Size: 95x65mmDocumentsWiki (Relay Shield for Arduino V2.1)SchematicsBoard LayoutSample codeHJR4102 datasheetShipping ListRelay Shield for Arduino V2.1 x1Nylon stand-off with screw x2
IntroductionThis is a dissolved oxygen sensor kit. A dissolved oxygen meter is used to measure the dissolved oxygen in water, to reflect the water quality. It is widely applied in many water quality applications, such as aquaculture, environment monitoring, natural science, etc. There’s an old saying regarding keeping fish, “Good fish deserves good water”. Good water quality is very important to aquatic organisms. Dissolved oxygen is one of the important parameters to reflect water quality. Low dissolved oxygen in the water will lead to difficulty in breathing for aquatic organisms, which may threaten their lives.The probe is galvanic, does not need polarization time, and stays available at any time. The filling solution and membrane cap are replaceable, leading to the low maintenance cost. The signal converter board is plug-and-play and works from 3.3V - 5V which makes it compatible with most popular microcontrollers such as ESP32, Raspberry Pi and Arduino. You may also check Liquid Sensor Selection Guide to get better familiar with our liquid sensor series.SPECIAL INSTRUCTION:Due to the International Import and Export Policy, the corrosive solution (acid & alkaline solution) cannot be delivered by air transportation. The filling solution is not included in the kit. You have to purchase it from the local shop or deploy the solution by yourself, refer to WiKi FAQ-Q4. It can’t work without a filling solution! Please be cautious with the purchase!Note:1. The filling solution is 0.5 mol/L NaOH solution. You need to pour it into the membrane cap before use. Please be cautious with the operation because the solution is corrosive. Please wear gloves! If the solution accidentally drops onto the skin, wash your skin with plenty of water immediately.2. The oxygen permeable membrane in the membrane cap is sensitive and fragile. Be cautious when handling it. Fingernail and other sharp objects should be avoided.3. The DO sensor will consume a little oxygen during the measurement. Please gently stir the solution and let the oxygen be distributed evenly in the water.FeaturesDissolved Oxygen Probe：1. Galvanic probe, no need polarization timE2. Filling solution and membrane cap is replaceable, low maintenance costSignal Converter Board：1. 3.3~5.5V wide-range power supply, compatible with most Arduino microcontroller2. 0~3.0V analog output, compatible with all microcontrollers with ADC function.3. Gravity interface, plug, and play, easy to useSpecificationDissolved Oxygen ProbeType: Galvanic ProbeDetection Range: 0~20mg/LResponse Time: Up to 98% full response, within 90 seconds (25℃)Pressure Range: 0~50PSIElectrode Service Life: 1 year (normal use)Maintenance Period: Membrane Cap Replacement Period: 1~2 months (in muddy water); 4~5 months (in clean water) Filling Solution Replacement Period: Once every monthCable Length: 2 metersProbe Connector: BNCSignal Converter BoardOperating Voltage: 3.3~5.5VOutput Signal: 0~3.0VCable Connector: BNCSignal Connector: Gravity Analog Interface (PH2.0-3P)Dimension: 42mm * 32mmDocumentsDissolved oxygen sensor Product WIKIShipping ListGalvanic Dissolved Oxygen Probe with Membrane Cap x1Spare Membrane Cap x1Signal Converter Board x1Gravity Analog Sensor Cable x1Waterproof Gasket x2Screw Cap for BNC Connector x1Plastic Dropper x2
IntroductionThis is a 4-channel optpcoupler-isolated relay Arduino UNO Shield, capable of controlling high-power devices operating at AC 240V 5A or DC 24V 5A for each channel.In a home automation project, relay modules play a crucial role in managing devices such as lights, pumps, garage doors, speakers, power outlets, and fans. However, traditional relay modules are burdened by space requirements, intricate wiring, and a potential for unreliable operation. Moreover, low-quality relay modules lacking optocoupler isolation compromise the safety of the entire project.By adopting the Arduino Shield approach, this product not only eliminates the need for complex wiring but also provides a substantial boost to project reliability. Through the integration of a 4-channel relay, it enables an Arduino UNO mainboard to exercise comprehensive control over a diverse range of devices.4 Channel Relay Shield for ArduinoFurthermore, this expansion board boasts an XBee interface in addition to 14 3-pin digital ports and 6 3-pin analog ports. With the inclusion of the XBee interface, users have the freedom to integrate wireless modules like Bluetooth, WiFi, or Zigbee, unlocking a realm of advanced capabilities such as IoT integration, seamless smart home integration, convenient mobile control, and efficient coordination among multiple devices.Arduino Uno Relay Shield Boasts an XBee InterfaceWith its 4-channel optocoupler isolation and independent power supply features, this relay expansion board effectively isolates the electrical connection between AC and DC, guaranteeing the utmost electrical safety. This meticulous design effectively eliminates any potential electromagnetic interference, thereby safeguarding the Arduino mainboard from the perils of high-voltage electrical signals and mitigating the risk of damage.FeaturesCompatible with Arduino UNO Rev3Each Relay has its own test button to test the connectionStandard DFRobot 3 Pin outXBee I/O direct controlSpecificationCompatible with Arduino UNO Rev34 buttons to test moduleLED status indicator of relaySupport Xbee IO directly controlXbee socket for wireless communicationSelectable digital IO pin for control (Default digital 2,7,8,10) 6 channels Analog IO & 13 channels Digital IO Up to 4 Relay with photo-coupled circuitContact Rating 3A AC 120V / DC 24VMax Switching Voltage AC 240V / DC 60V (Less than 38V is recommended)Max Switching Current 5AMax Switching Power AC 360VA / DC 90WElectrical Life (Min) 100,000 OperationsMechanical Life (Min) 10,000,000 OperationsSafety Standard(relay) UL cUL TUV CQCCoil Working Voltage 9VDCWorking temperature -30℃ to +85℃Working Humidity 40% - 85%Size: 95x65mmDocumentsWiki (Relay Shield for Arduino V2.1)SchematicsBoard LayoutSample codeHJR4102 datasheetShipping ListRelay Shield for Arduino V2.1 x1Nylon stand-off with screw x2
IntroductionThis is a dissolved oxygen sensor kit. A dissolved oxygen meter is used to measure the dissolved oxygen in water, to reflect the water quality. It is widely applied in many water quality applications, such as aquaculture, environment monitoring, natural science, etc. There’s an old saying regarding keeping fish, “Good fish deserves good water”. Good water quality is very important to aquatic organisms. Dissolved oxygen is one of the important parameters to reflect water quality. Low dissolved oxygen in the water will lead to difficulty in breathing for aquatic organisms, which may threaten their lives.The probe is galvanic, does not need polarization time, and stays available at any time. The filling solution and membrane cap are replaceable, leading to the low maintenance cost. The signal converter board is plug-and-play and works from 3.3V - 5V which makes it compatible with most popular microcontrollers such as ESP32, Raspberry Pi and Arduino. You may also check Liquid Sensor Selection Guide to get better familiar with our liquid sensor series.SPECIAL INSTRUCTION:Due to the International Import and Export Policy, the corrosive solution (acid & alkaline solution) cannot be delivered by air transportation. The filling solution is not included in the kit. You have to purchase it from the local shop or deploy the solution by yourself, refer to WiKi FAQ-Q4. It can’t work without a filling solution! Please be cautious with the purchase!Note:1. The filling solution is 0.5 mol/L NaOH solution. You need to pour it into the membrane cap before use. Please be cautious with the operation because the solution is corrosive. Please wear gloves! If the solution accidentally drops onto the skin, wash your skin with plenty of water immediately.2. The oxygen permeable membrane in the membrane cap is sensitive and fragile. Be cautious when handling it. Fingernail and other sharp objects should be avoided.3. The DO sensor will consume a little oxygen during the measurement. Please gently stir the solution and let the oxygen be distributed evenly in the water.FeaturesDissolved Oxygen Probe：1. Galvanic probe, no need polarization timE2. Filling solution and membrane cap is replaceable, low maintenance costSignal Converter Board：1. 3.3~5.5V wide-range power supply, compatible with most Arduino microcontroller2. 0~3.0V analog output, compatible with all microcontrollers with ADC function.3. Gravity interface, plug, and play, easy to useSpecificationDissolved Oxygen ProbeType: Galvanic ProbeDetection Range: 0~20mg/LResponse Time: Up to 98% full response, within 90 seconds (25℃)Pressure Range: 0~50PSIElectrode Service Life: 1 year (normal use)Maintenance Period: Membrane Cap Replacement Period: 1~2 months (in muddy water); 4~5 months (in clean water) Filling Solution Replacement Period: Once every monthCable Length: 2 metersProbe Connector: BNCSignal Converter BoardOperating Voltage: 3.3~5.5VOutput Signal: 0~3.0VCable Connector: BNCSignal Connector: Gravity Analog Interface (PH2.0-3P)Dimension: 42mm * 32mmDocumentsDissolved oxygen sensor Product WIKIShipping ListGalvanic Dissolved Oxygen Probe with Membrane Cap x1Spare Membrane Cap x1Signal Converter Board x1Gravity Analog Sensor Cable x1Waterproof Gasket x2Screw Cap for BNC Connector x1Plastic Dropper x2
