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Best Choice eMagTech 
eMagTech 50PCS PC817 Optocoupler in-Line 2.54mm Pitch 4-pin DIP-4 Mounting Transistor Output Opticalcoupler for Computer Feature : Integrated circuits have the advantages of small size, light weight, small solder joints, long life, high reliSING F LTD 
SING F LTD 4X 1-Channel PC817 Optocoupler Isolation Module (3-5V) Suitable for Photoelectric Isolator Signal Ssolation 1-Channel PC817 Optocoupler Isolation module adopts 5.0 pitch screw terminals for easy wiring.Best Value Senzooe 
2PCS PC817 2 4 8 Channel Optocoupler Insulated Circuit Board Voltage Converter Adapter Module 3.6-30V Driver Light Insul 2PCS PC817 2 4 8 Channel Optocoupler Insulated Circuit Board Voltage Converter Adapter Module 3.6-30V Driver Light InsulLT Easiyl 
LT Easiyl 4 Pcs Circuit Board 2 Channel Optocoupler Isolation Board Module PC817 3.6-30V Fit for Sensors Actuators Power This product is a 2-channel isolation module based on PC817 optocoupler, which can achieve signal isolation transmissionWaour 
1Pc Green 1-Channel PC817 Optocoupler Isolation Module Optoelectronic Isolator Signal Isolation and Anti-Interference 3- PC817 OPTOCOUPLER MODULE: 1-channel isolation module using the PC817 optocoupler for reliable signal isolation.Zopsc 
Zopsc 4 Channel Voltage Converter Optocoupler Isolated Board Adapter Module, 3.3V/5V to 3.6V/24V, Strong Anti-Interferen 【Easy for Use】It can realize 3.3V or 5V to control the interface of 3.6--24V voltage level. After the control terminal iLT Easiyl 
LT Easiyl 2Pcs AC 220V to DC 3–24V Optocoupler Isolation Module, 1-Channel Trigger Switch Sensor Board Compatible with A Function: Converts AC 220/230V input signals to safe DC logic levels for microcontrollers and PLCs, enabling reliable siEMSea EMSea 50x Op Amp Timer Darlington Optocoupler Low Input IC Assortment Kit 10 Type Package includes: In total 50pcs 10 size, each size per 5pcs. You will get LM324, LM358, LM386, LM393, UA741, NE5532, NELXJLXD ADUM1201 Two Channel Digital Isolator Board Replace Optocouplers Low Power and Optocoupler Replacement Optocoupler Alter Quiet with digital isolation technology, the ADUM1201 is more resistant to external interferences, improving overall relKHADBXCP 5PCS PC817 4 Channel Optocoupler Insulated Circuit Voltage Converter 3.6-30V Driver Light Insulation Shield 5PCS PC817 4 Channel Optocoupler Insulated Circuit Board Voltage Converter Adapter Module 3.6-30V Driver Light InsulatioDIANN DIANN 10pcs DC 5V Relay Module 1 Channel Relay Board with Optocoupler Support High/Low Level Trigger Relay Board Maximum Load: AC 250V/10A; DC 30V/10A With Power and Relay Action Indicator;Trigger Current: 5mANikovoke 2Pcs 3V Relay Module Switch Board, 1 Channel Optocoupler Module with Isolation Control, Compatible for IoT ESP8266 and A [Rapid Response Time] This 3V Relay Module Switch Board features an ultra-fast response speed of less than 20 milliseconSING F LTD SING F LTD 4X 1-Channel PC817 Optocoupler Isolation Module (12V) Suitable for Photoelectric Isolator Signal Ssolation an 1-Channel PC817 Optocoupler Isolation module adopts 5.0 pitch screw terminals for easy wiring.DIANN DIANN 2pcs 4 Channel 5V Relay Module with Optocoupler High or Low Level Trigger Expansion Board Relay Module : Channel: 4 Channel; Working Voltage: DC 5V; Equipped with High-Current Relay, Maximum Load: AC250V 10A, 1DIANN DIANN 10pcs DC 12V Relay Module 1 Channel Relay Board with Optocoupler Support High/Low Level Trigger Relay Board Maximum Load: AC 250V/10A; DC 30V/10A With Power and Relay Action Indicator;Trigger Current: 5mACreate idea Create idea 5pcs 817 2-Channel Optocoupler Isolation Voltage Control Switching Module 3.6-24V Driver Photoelectric Isola This module is used when it is necessary to isolate the control in actual work and voltage conversion.It can realize 3.3Fullnightfirefly Star 10pcs 1-Channel 12V Relay with optocoupler Isolation Supports high and Low Level triggering 10pcs 1-Channel 12V Relay with optocoupler Isolation Supports high and Low Level triggeringPhefop 2 Channel 12V Relay Module with Optocoupler Isolation, High and Low Level Trigger Selectable, AC 10A DC 30V 10A for Ardu [Fault-tolerant Design] Relay remains stable even if the control line is broken, ensuring reliable operation.YIQFOCA 5 Set 3V 1 Channel Relay Power Switch Board, High Level Driver Optocoupler Module Isolated Drive Control Board for ESP82 You will recevie 5Pcs 3v Relay 1 Channel power switch module compatible with 10A 250VAC and 10A 30VDC load.5pcs * 2.5 mmDONGKER Optocoupler Isolation Board, 8CH Optocoupler Isolation Module DC 3.3V 5V 8-Channel PNP NPN Low High Level Output Signal Optocoupler isolation control.KHADBXCP 4pcs 4-Channel 5V Relay Module with optocoupler Isolation Supports high and Low Level triggering 4pcs 4-Channel 5V Relay Module with optocoupler Isolation Supports high and Low Level triggeringDomary 3 Channel Relay Module High Voltage Relay Board Isolated Optocoupler High Low Level Control for Home Automation (5v (3.3 [Convenient Interface Design] With a user-friendly interface, all connections can be easily made through terminal wiringRivermidfish AU 10PCS 1-Channel PC817 Optocoupler Isolation Module 12V Photoelectric Isolator 10PCS 1-Channel PC817 Optocoupler Isolation Module 12V Photoelectric IsolatorBadafaci Badafaci 1 Channel Optocoupler Relay Module Strong Driving Ability with High Low Level Selection for 5V 12V 24V Operatin [High Performance Optical Isolation] This 1 channel optocoupler relay module features advanced patch photocoupler isolatEC Buying EC Buying 5Pcs 3-5V Optocoupler Isolation Board Optoelectronic Isolator EL817 PC817 Card Rail Bracket Input 3-5 V Optoco 1-way optocoupler isolation module with EL817 features, providing input voltage of DC 3V ~ 5V and output voltage suitablCHICIRIS CHICIRIS One Way Relay Module, 30A High Power Optocoupler Isolation Relay Module for Stable Performance in Industrial Us [SUPERIOR OPTOCOUPLER QUALITY] Crafted with top-notch miniature optocoupler for stable and reliable performance.Somkaco 4-Piece 12V Relay Module Kit, 1-Channel Module with Optocoupler Isolation, Supports High-Level and Low-Level Trigger, Fa Reliable Fault-Tolerant Design for Enhanced Safety and Dependability: Ensures the relay remains unaffected even if the cCryfokt MOSFET Module, with Indicator MOS Tube Module, Quick Connection Strong Anti-Interference Ability for High Power Equipmen Stable Performance: MOS Tube Module uses high-quality ultra-small optocouplers with strong anti-interference ability, stEujgoov Eujgoov 1 Channel Optocoupler Relay, Relay Module, 1 Channel Relay Module 12V Relay Module Board 12V Relay Board Trigger Optocoupler Isolation Technology: Adopt patch photocoupler isolation with strong driving ability and stable performance,Jimcat star 2PCS DC 3.3V 5V NPN Low Level Output 8-Channel Optocoupler Isolation Board Signal Converter Opto Voltage Isolation Modul 2PCS DC 3.3V 5V NPN Low level output 8-Channel Optocoupler Isolation Board Signal Converter Opto Voltage Isolation ModulEujgoov Eujgoov 1 Channel Optocoupler Relay, Relay Module, 1 Channel Relay Module 12V Relay Module Board 12V Relay Board Trigger Optocoupler Isolation Technology: Adopt patch photocoupler isolation with strong driving ability and stable performance,Jimcat star 2PCS DC 3.3V 5V NPN Low Level Output 8-Channel Optocoupler Isolation Board Signal Converter Opto Voltage Isolation Modul 2PCS DC 3.3V 5V NPN Low level output 8-Channel Optocoupler Isolation Board Signal Converter Opto Voltage Isolation Modulzozii zozii Optocoupler Tester Online Test Detection Tool for Electronic Repair Special 4 Pin Optocoupler Test PCB Repair Blue 4,Measurement to that the optocoupler test board and the measured optocoupler have good contactGeneric 2 Pcs 1 Channel 12V Relay Module with Optocoupler Isolation Support High or Low Level Trigger Module uses genuine high quality relay, normally open interface maximum load: AC 250V / 10A, DC 30V / 10ATIKATARER TIKATARER 16 Channel Relay Module Optocoupler 10A Low Actuator for MCU Development Appliance Control [HIGH CONTACT CAPACITY] Contact capacity of 10A with optocoupler protection ensures safe and reliable operation.Reland Sun 3.3V 5V 12V 3 Channel Relay Module 5mA With Optocoupler Isolation Signal (3.3V-5V) 3.3V 5V 12V 3 Channel Relay Module 5mA With Optocoupler Isolation SignalYechiry Yechiry 4 Channel Optocoupler Isolated Board, Voltage Converter Adapter Module with Photoelectric Isolation, Ideal for 3 [Independent Channel Control] Each of the four optocoupler channels operates independently, enabling simultaneous controEujgoov Eujgoov Small Relay Module 2 Channel 3.3V 5V Optocoupler Isolation NO NC Switch with Light Indicator for AC DC Control B [VERSATILE COMPATIBILITY] This relay module is fully compatible with both 3.3V and 5V TTL control signals, making it ideYechiry Yechiry 4 Channel MOS FET Module, PLC Amplifier Board Driver Circuit, Optocoupler Isolation Module with Signal Indicator [Visual Signal Indicators] Equipped with clear input/output signal indicators, this module offers visual feedback for eaGeneric 2-Channel 12V 30A Relay Board Module with Optocoupler Isolation High Low Trigger Signal Input Terminal Normally Open Clo The module can be set high or low trigger.DIANN DIANN 2pcs 4 Channel 12V Relay Module with Optocoupler High or Low Level Trigger Expansion Board Relay Module : Channel: 4 Channel; Working Voltage: DC 12V; Equipped with High-Current Relay, Maximum Load: AC250V 10A,Senzooe 2PCS PC817 2 4 8 Channel Optocoupler Insulated Circuit Board Voltage Converter Adapter Module 3.6-30V Driver Light Insul 2PCS PC817 2 4 8 Channel Optocoupler Insulated Circuit Board Voltage Converter Adapter Module 3.6-30V Driver Light InsulVOANZO VOANZO 8 Channel Optocoupler Isolation Board Module 817 3.6-30V Optoelectronic Isolated Module for Electrical Isolation Signal Isolation and Protection: This 8-channel optocoupler isolation board ensures safe and reliable signal isolation,EC Buying EC Buying XL9535-K8V5 8-Way Expandable Relay Module 5V Power Supply IIC Communication Optocoupler Isolation for Arduino Effortlessly control up to 32 relays with just 2 IO ports using the XL9535-K8V5 8-Way Expandable Relay Module, ideal forAKLOSIPY AKLOSIPY 3-Channel High Voltage Relay Module with Isolated Optocoupler, Options for 5V/3.3V & 3V-7V Applications (5v (3. Versatile Triggers - Our relay module stands out with its ability to set both high and low triggers, catering to the disReland Sun 5V 9V 12V 24V 1 Channel Relay Module With Optocoupler Isolation Support High or Low Level Trigger (24V) Module uses genuine high quality relay, normally open interface maximum load: AC 250V / 10A, DC 30V / 10ADcnhfdsw Dcnhfdsw Optocoupler Tester Optocoupler Test Detection Tool Optocoupler Online Test Module Optocoupler Electronic Repair Before testing, the motherboard must be powered off and then discharged. Testing cannot be carried out while the power iReland Sun 5PCS 5V 9V 12V 24V 1 Channel Relay Module with Optocoupler Isolation Support High or Low Level Trigger (12V) 5PCS 5V 9V 12V 24V 1 Channel Relay Module with Optocoupler Isolation Support High or Low Level TriggerJINdanju JINdanju Optocoupler Test Detection Tool Optocoupler Repair Electronic Repair Accessories It uses a type-c interface, which is rechargeable and the pins can be replaced.Generic Generic 4 Channel Optocoupler Isolated Board Converter for Voltage Control Interface 3.6-24V for DIY Enthusiasts 【VERSATILE VOLTAGE CONVERSION】Convert 3.3V or 5V to control 3.6-24V with this module, ideal for isolation control and voReland Sun RELAND SUN 30A 5V 12V 24V 1 Channel Relay Module Optocoupler Isolation High Level Trigger Relay (5V) 30A 5V 12V 24V 1 Channel Relay Module Optocoupler Isolation High Level Trigger RelayReland Sun 5pcs 5V 12V 24V 2 Channel DC Relay Module with Optocoupler High/Low Level Trigger Expansion Board (12V) 5pcs 5V 12V 24V 2 Channel DC Relay Module with Optocoupler High/Low Level Trigger Expansion BoardReland Sun 5pcs 5V 12V 24V 2 Channel DC Relay Module with Optocoupler High/Low Level Trigger Expansion Board (24V) 5pcs 5V 12V 24V 2 Channel DC Relay Module with Optocoupler High/Low Level Trigger Expansion Board20% Off ELEGOO ELEGOO 4 Channel DC 5V Relay Module with Optocoupler for Arduino UNO R3 MEGA 2560 1280 DSP ARM PIC AVR STM32 This relay module is 5V active low. Relay output maximum contact is AC250V 10A and DC30V 10A.cizihuu 1pcs PC817 Optocoupler Isolation Board Voltage Converter Adapter Module,8 Way Jumper Cap Can Achieve Output Port Is High POtential Or Pull Down OutputReland Sun Reland Sun 10pcs PC851 DIP-4 PC851XNNSZ0F DIP PC851XJ0000F DIP4 optocoupler 10pcs PC851 DIP-4 PC851XNNSZ0F DIP PC851XJ0000F DIP4 optocouplerJINdanju JINdanju Optocoupler Tester, Optocoupler Test Detection Device for 817 4-Pin TL431 MOS IGBT Transistor Bold and hardened test pin with elasticity.ECSiNG ECSiNG 2Pcs 1 Channel 12V Relay Module with Optocoupler Isolation Expanding Board Support Low-Level Trigger Or High-Leve Our relays have a fault-tolerant design, even if the control line is broken, the relay will not operate, making it saferReland Sun Reland Sun 10pcs H11A817B DIP-4 H11A817 817B optocoupler 10pcs H11A817B DIP-4 H11A817 817B optocouplerTizuqe 4 Fiberglass Optocoupler Board and Simplified Bridge Easy Install Optocoupler Achieve high measurements with this isolator tester module, featuring 4 fiberglass materials for stable electrical and iReland Sun IR Infrared Slotted Optical Speed Measuring Sensor Detection Optocoupler Module for Motor Test Reland SunDONGKER 4-Channel optocoupler Insulator PLC Signal Level Voltage Converter Module 3.3 V to 24 V / 5 V to 24 V / 12 V to 3.3 V / Widely used: can be used for signal isolation, PLC signal level conversion, PNP / NPN signal to NPN signal and signal leDWEII DWEII 5pcs 5V 2 Channel 5V Relay Module with Optocoupler Low Level Trigger Expansion Board Compatible with R3 MEGA 2560 Standard interface that can be controlled directly by microcontroller (Compatible with Arduino, 8051, AVR, PIC, DSP, ARMGeneric 3.3V/5V/12V/24V 1/2/4/6/8 Channel Relay Module High and Low Level Trigger Dual Optocoupler Isolation (4 Channel,3.3V) The module uses genuine quality relay, normally open interfaces , Maximum load: AC 250V/10A, DC 30V/10A.Fafeicy Fafeicy Relay Module Board 1 Channel Relay Module High & Low Actuator Optocoupler for Home (12V) Fault-Tolerant Design: Fault-tolerant design,even if the control line breaks,the relay will not move.Badafaci Badafaci Safety Isolation, CH340T USB, High Speed, Optocoupler, Voltage Regulator, Step Down Converter, Adjustable, Self [SAFETY ISOLATION]: Our TTL output module effectively prevents damage to the computer's USB port and motherboard, protecTbest Tbest 817 4-Channel Optocoupler Isolated Voltage Converter Module for Safe Isolation Control: This 4-channel optocoupler isolated board is designed for applications requiring isolation control anTiiyee 4 Channel Optocoupler Relay Module, Board High and Low Trigger Module with Isolation Support High/Low Level for Automati High and Low Level Controllable: Optocoupler relay module with a jumper cap, you can choose a low level control or a higDcnhfdsw Dcnhfdsw 2X Optocoupler Tester Optocoupler Test Detection Tool Optocoupler Online Test Module Optocoupler Electronic Rep After many hardware updates and parameter modifications, the current generation is very easy to use. As long as the indiASHATA Relay Module,8 Channel Optocoupler Relay Module Board High & Low Trigger 5V/12V/24V,Relay Module with Isolated Optocoupl Adopt patch photocoupler isolation, strong driving ability, stable performance. Trigger current is 5mA.Generic Generic 16 Channel Optocoupler Relay Board with Industry-Grade Isolation Stability for MCU 10A [SAFE AND RELIABLE] Optocoupler protection ensures safe operation, while the high contact capacity of 10A offers reliablEosnow Eosnow 4 Channel Optocoupler Isolated Board for Voltage Conversion and Control, Strong Anti-Interference Ability, for Pr [EASY VOLTAGE CONVERSION] Easily convert 3.3V or 5V to control a 3.6--24V interface with this module.Domary Domary 8 Channel Optocoupler Relay Module Board High & Low 5V/12V/24V, for Versatile Applications (24V) Adopt patch photocoupler isolation with strong driving ability; current is 5ma.Hsyzygian 1 Channel Relays Switches with with Optocoupler Isolation ABS Housing 10A Load Capacity for DIYer Electronics Projects O 【Efficient Control Solution】This single channel relays ensures stable signals transmission and control for industrial auCGTOLOS CGTOLOS 4 Channel Relay Module 30A Load Current with Optocoupler Isolation Supports High and Low Triger 5V 12Volt 24Volt This module uses a double-sided printed circuit board, and the layout of the entire module is reasonable and beautiful.HSJDNCBA 2PCS 5V 8 Channel Optocoupler Relay High & Low 2PCS 5V 8 Channel Optocoupler Relay High & LowHSJDNCBA 2PCS 12V 8 Channel Optocoupler Relay High & Low 2PCS 12V 8 Channel Optocoupler Relay High & LowReland Sun DC 5V 12V 24V 1 Channel Relay Module 30A with optocoupler Isolation high and Low Level Trigger Relay Module (5V) Reland SunHSJDNCBA 3PCS 5V 8 Channel Relay with Optocoupler 3PCS 5V 8 Channel Relay with OptocouplerASHATA Relay Module,8 Channel Optocoupler Relay Module Board High & Low Trigger 5V/12V/24V,Relay Module with Isolated Optocoupl Adopt patch photocoupler isolation, strong driving ability, stable performance. Trigger current is 5mA.HSJDNCBA 3PCS 12V 8 Channel Relay with Optocoupler 3PCS 12V 8 Channel Relay with OptocouplerGebildet Gebildet DC 12V 4 Channel Relay Module Board Shield Support High or Low Level Compatible Development Board Trigger with Main Specification Peak Load of NO Connector: AC 250V/10A, DC 30V/10A; Trigger Current: 5mA; The Module Operating VoltagGebildet Gebildet 4pcs DC 24V 1 Channel Relay Module Board Shield with Optocoupler Isolation Support High or Low Level Compatible This Relay Board Maximum load: AC 250V/10A, DC 30V/10A With power and relay action indicator.each relay has normally opeGeneric Imported TLP2745 SOP6 Patch Drive optocoupler optocoupler SOP-6 Package contents:TLP2745 SOP6 (1pieces)Sluffs 1 Channel Optocoupler Isolation Board Voltage Converter Adapter Module,Opto Isolator Module Voltage Detection for PLC AC [DETECT OUTPUT TTL LEVEL]: This Opto Isolator Module allows for the detection of output TTL level by a microcontroller.JESSINIE JESSINIE 24V Relay Module with Optocoupler Isolation, 1 Channel High/Low Level Trigger, Compatible with Arduino Raspberr **High-Quality Relay with Optocoupler Isolation:** Ensure stable performance and reliable operation with genuine high-quDollaTek DollaTek AC 220V Microcontroller TTL Level Optocoupler Insulation Module scm Test Card for SPS 1 Channel The 1-channel AC-220V optocoupler module is specially designed for testing or recognition.VGOL VGOL 10 Pcs Optocoupler IC DIP 8 Pin Compatible with 6N139 EL6N139S EL6N139 for CNC Controllers 3D Printing White - Compatible with 6N139 EL6N139S EL6N139 for use in optical isolation circuits and replacement needsFullnightfirefly Star 10PCS 1 Channel Relay 12V Expansion Shield with Optocoupler 10PCS 1 Channel Relay 12V Expansion shield with OptocouplerReland Sun DC 5V 12V 24V 1 Channel Relay Module 30A with optocoupler Isolation high and Low Level Trigger Relay Module (12V) Reland SunNOYITO NOYITO TLP281 4-Channel Optocoupler Isolation Board for High and Low Level Optocoupler Isolation Expansion Board (Pack o TLP281 4 Channel Optical Coupler Isolation ModuleTYSQXQ 1pcs D207 ILD207T optocoupler SMD SOP8 Dual-Channel optocoupler Model Number: ILD207TASHATA Relay Module,8 Channel Optocoupler Relay Module Board High & Low Trigger 5V/12V/24V,Relay Module with Isolated Optocoupl Adopt patch photocoupler isolation, strong driving ability, stable performance. Trigger current is 5mA.Generic Generic PLC Amplification 4 Channel MOS Module with Optocoupler Isolation Driver for High Power Equipment Control [STRONG INTERFERENCE PROOF] Quality optocoupler for excellent anti-interference abilityTOPINCN TOPINCN Optocoupler Isolator Board 24V to 5V Signal Converter Module for PNP to NPN Conversion Lightweight PCB Material [STABLE PERFORMANCE] Optocoupler Isolator guarantees reliable 24V to 5V conversion.FainWan FainWan Relay Module One Way 30A Optocoupler Isolation Relay Module High Power Relay High/Low Level Trigger YYG-2(12VDC) ANTI-INTERFERENCE---Made of the high quality miniature optocoupler, the relay module is of anti-interference ability, stReland Sun Reland Sun NPN Output Four-Way optocoupler Isolation PLC Level Voltage Conversion Board 1.8V 3.3V 5V 12V 24V Unidirectio NPN Output Four-Way optocoupler Isolation PLC Level Voltage Conversion Board 1.8V 3.3V 5V 12V 24V Unidirectional TransmiGeneric 10pcs Imported PC356 optocoupler Patch SOP4 Optical Isolator optocoupler 356 optocoupler SOP-4 Package contents:PC356 SOP4 （10pieces）The Lord of the Tools The Lord of the Tools 4x 1-Channel PC817 Optocoupler Isolation Module (3-5V) Suitable for Photoelectric Isolator Signal 1-Channel PC817 Optocoupler Isolation module adopts 5.0 pitch screw terminals for easy wiring.