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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 reliEMSea 
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, NEBest Value SING 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.SING 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.Rivermidfish AU 
100PCS PC817 Optocoupler in-Line 2.54mm Pitch 4-pin DIP-4 Mounting Transistor Output Opticalcoupler 100PCS PC817 Optocoupler in-Line 2.54mm Pitch 4-pin DIP-4 Mounting Transistor Output OpticalcouplerReland Sun 
5PCS 5V 9V 12V 24V 1 Channel Relay Module with Optocoupler Isolation Support High or Low Level Trigger (5V) 5PCS 5V 9V 12V 24V 1 Channel Relay Module with Optocoupler Isolation Support High or Low Level TriggerECSiNG 
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 saferEMSea EMSea 2Pcs Optical Isolator Module Voltage to Current Converter Module Input Optoisolator 12V 80KHz 1 Channel PC817 EL81 It is made of premium material, which is not easy to wear and comfortable to touch.YINETTECH YINETTECH 4Pcs VTL5C3 Opto-Coupler VTL5C DIP-4 Audio Opto-Coupler (Vactrols) Linear Opto-Isolator Suitable for Many Guit Applications: Commonly used in tremolo and vibrato circuits within guitar pedals and amplifiers to create distinctive moKHADBXCP 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 InsulatioEVGATSAUTO EVGATSAUTO 1 Channel Optocoupler Relay Module, 5V 12V 24V Operating Voltage with High Low Level for Industrial Automatio 【Easy Jumper Settings】 : The relay module can be easily configured and customized according to your specific project neeeMagTech eMagTech 5Pcs 16Pin 4 Channels Transistor Output LTV847 LTV 847 for Appliances Electrical Network Suitable for various scenarios such as electrical control, electrical system signal transmission, network communicationDIANN 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: 5mASenzooe 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 InsulReland Sun 5PCS 5V 9V 12V 24V 1 Channel Relay Module with Optocoupler Isolation Support High or Low Level Trigger (24V) 5PCS 5V 9V 12V 24V 1 Channel Relay Module with Optocoupler Isolation Support High or Low Level TriggerReland Sun Reland Sun 10pcs 4N38 4N37 4N36 4N35 4N33 4N32 4N27 4N28 4N25 4N26 DIP-6 IC Optocoupler (4N26) 10pcs 4N38 4N37 4N36 4N35 4N33 4N32 4N27 4N28 4N25 4N26 DIP-6 IC OptocouplerKHADBXCP 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 triggeringDIANN 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: 5mAEC 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 suitablPhipps Electronics 5v 1 Channel Low Level Relay Module with Optocoupler 5V 1 Channel Low Level Relay Module with OptocouplerReland 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 Triggercizihuu 1pcs PC817 Optocoupler Isolation Board Voltage Converter Adapter Module,8 Way Jumper Cap Can Achieve Output Port Is High POtential Or Pull Down OutputMadifei AU 5Pcs 12V 8 Channel Relay Module Interface Board with Optocoupler 5Pcs 12V 8 Channel Relay Module Interface Board with OptocouplerReland Sun 5V 9V 12V 24V 1 Channel Relay Module with Optocoupler Isolation Support High or Low Level Trigger (9V) Module uses genuine high quality relay, normally open interface maximum load: AC 250V / 10A, DC 30V / 10AGeneric 3.3V/5V/12V/24V 1/2/4/6/8 Channel Relay Module High and Low Level Trigger Dual Optocoupler Isolation (1 Channel,3.3V) The module uses genuine quality relay, normally open interfaces , Maximum load: AC 250V/10A, DC 30V/10A.CHICIRIS CHICIRIS PWM 4-Channel Motor Driver Module, 3-20V to 3.7-27VDC 10A MOS FET Board for PLC System, Stepper Motor Speed Con [STRONG ANTI-INTERFERENCE] Equipped with optocoupler to eliminate interference and ensure stable performance.Sitojart Star 10Pcs 12V 1-Channel PC817 Optocoupler Isolator 10Pcs 12V 1-Channel PC817 Optocoupler IsolatorReland Sun 5pcs 5V 12V 24V 2 Channel DC Relay Module with Optocoupler High/Low Level Trigger Expansion Board (5V) 5pcs 5V 12V 24V 2 Channel DC Relay Module with Optocoupler High/Low Level Trigger Expansion BoardReland 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 TransmiReland 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 TransmiYIQFOCA 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 mmDIANN 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,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 ModulReland Sun IR Infrared Slotted Optical Speed Measuring Sensor Detection Optocoupler Module for Motor Test Reland SunAKLOSIPY 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 disNikovoke 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 milliseconReland 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 BoardPhefop Phefop Solid State Relays Board with Optocoupler Isolation High and Low Level Actuator Compatible Development Board 2 Ch [Fault-tolerant Design] Relay remains stable even if the control line is broken, ensuring reliable operation.Create 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 3.3Reland 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 Signal19% 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.ASHATA 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.Fafeicy Fafeicy Relay Module Board 1 Channel Relay Module High & Low Actuator Optocoupler for Home (5V) Fault-Tolerant Design: Fault-tolerant design,even if the control line breaks,the relay will not move.Reland Sun Reland Sun 10pcs 4N38 4N37 4N36 4N35 4N33 4N32 4N27 4N28 4N25 4N26 DIP-6 IC Optocoupler (4N35) 10pcs 4N38 4N37 4N36 4N35 4N33 4N32 4N27 4N28 4N25 4N26 DIP-6 IC Optocouplercizihuu 1pcs PC817 Optocoupler Isolation Board Voltage Converter Adapter Module,2 Way Jumper Cap Can Achieve Output Port Is High POtential Or Pull Down Outputcizihuu 1pcs PC817 Optocoupler Isolation Board Voltage Converter Adapter Module,4 Way Jumper Cap Can Achieve Output Port Is High POtential Or Pull Down OutputZopsc 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 iCHENBO 4 pcs DC 5V 1 Channel Relay Module Board Shield High/Low Level Trigger with Optocoupler for Arduino The module uses genuine quality relay, normally open interfacesEigell Eigell Optocoupler Detection Instrument 3rd 4TH 5TH Gen USB Or Type C Power Source 【Compatibility】: Clearly marked pin 1 (with a small dot) on both the optocoupler and test board for accurate alignment dCHENBO 2 pcs 5V 2 Channel DC 5V Relay Module with Optocoupler High/Low Level Trigger Expansion Board for Arduino Maximum load: AC 250V/10A, DC30V/10AAKLOSIPY AKLOSIPY 4-Channel Optocoupler Isolation Board 24V to 5V PLC Converter Module for Industrial Isolation & Voltage Convers Conversion - The Optocoupler Isolation Board excels in converting 24V to 5V, ensuring reliable and stable performance foAOICRIE AOICRIE 5Pcs DC 12V 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 4 Channel DC 12V Relay Module with Optocoupler Isolation Relay Control Board Maximum 250V 10A and DC30V 10A.Generic DC 12V Relay Module 2-Channel Relay Switch with Optocoupler Isolation High/Low Level Trigger Fault-tolerant design, even if the control line is broken, the relay will not move.Majosta Electronic Components: A Beginner’s Guide To Diodes, Resistors, Capacitors, Transistors, Inductors, Integrated Circuits, Tbest 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 anMetieFasia MetieFasia Multifunctional 3V 8 Channel Relay Card Module Optocoupler for Anti-interference ability, the use of freewheeling protection.ELEGOO ELEGOO 8 Channel DC 5V Relay Module with Optocoupler for Arduino UNO R3 MEGA 2560 1280 DSP ARM PIC AVR STM32 5V 8-Channel Relay interface board, each one needs about 70mA Driver Current; Equiped with high-current relay, AC250V 101PZ 1PZ DCR-M70 DC 5V 8 Channel Relay Module Board Solid State Relay with Optocoupler Replacement for Arduino UNO R3 MEGA 25 【Compatibility】 Suitable for all kinds of electronic devices1PZ 1PZ DCR-M70 DC 5V 8 Channel Relay Module Board Solid State Relay with Optocoupler Replacement for Arduino UNO R3 MEGA 25 【Compatibility】 Suitable for all kinds of electronic devicesPerGar Optocoupler Isolation Board 8 Channel Driver Photoelectric Isolated Module 817 3.6 30V Achieve Unparalleled Voltage Conv DRIVE VARIOUS OCCASION: Optical isolation has strong interference resistant ability, which can drive high power transistEosnow 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.Reland Sun 5V 12V 24V 8 Channel Relay Module Interface Board for 51/AVR/AVR/ARM with Optocoupler Protection (12V) 5V 12V 24V 8 Channel Relay Module Interface Board for 51/AVR/AVR/ARM with Optocoupler ProtectionDomzhili Domzhili Optocoupler Tester Optocoupler Test Detection Tool Online Test Module Electronic Repair Tool for 4-Pin Optocoup 2. Confirm the optocoupler PIN1 (the pin with a small dot on the test board also has a corresponding pin)CHICIRIS 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.ASHATA 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.NOYITO NOYITO PC817 4-Channel Optocoupler Isolation Board Voltage Converter Adapter Module 3.6-30V Driver Photoelectric Isolate 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.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.TYSQXQ 1pcs D207 ILD207T optocoupler SMD SOP8 Dual-Channel optocoupler Model Number: ILD207TGeneric 5PCS/LOT AQH3223 Optocoupler DIP-7 Optoisolator Optocoupler AQH3223 DIP-7 （5pieces）Reland Sun Reland Sun 10pcs H11A817B DIP-4 H11A817 817B optocoupler 10pcs H11A817B DIP-4 H11A817 817B optocouplerSnblzhef Snblzhef Optocoupler Tester, Optocoupler Test Detection Device for 817 4-Pin TL431 MOS IGBT Transistor Bold and hardened test pin with elasticity.Snblzhef Snblzhef Optocoupler Tester, Optocoupler Test Detection Device for 817 4-Pin TL431 MOS IGBT Transistor With test indicator light.MiZOELEC 10pcs/lot MOC3083 M0C3083 EL3083 DIP-6 Triac & SCR Output Optocouplers 800VDRM IFT=5mA 6 Pin Optocoupler 10pcs/lot MOC3083 M0C3083 EL3083 DIP-6 Triac & SCR Output Optocouplers 800VDRM IFT=5mA 6 Pin OptocouplerSnblzhef Snblzhef 2pcs 5.0 Optocoupler Test Instrument Online Detection Tools for Electronic Repair Special for Optocoupler Test 3, the optocoupler test board connected to the USB power cord, the test board probe contact need to test the optocouplerMiZOELEC 10pcs/lot MOC3063 DIP-6 optocoupler 10pcs/lot MOC3063 DIP-6 optocouplerCryfokt Cryfokt Optocoupler Isolation Module Efficient Practical Voltage Detection Board for PLC, 1 Channel AC, 5PCS Set for Wid [PRECISE VOLTAGE DETECTION] Quickly identify the presence of AC with 1 channel optocoupler isolation moduleJESSINIE JESSINIE 3 Channel AC 220V Optocoupler Isolation Module AC Detection Module 220V Testing Module 3 Channel 220V optocoupler isolation module, using NPN transistor to output saturated conduction current up to 100-300MAJESSINIE JESSINIE 3 Channel AC 220V Optocoupler Isolation Module AC Detection Module 220V Testing Module 3 Channel 220V optocoupler isolation module, using NPN transistor to output saturated conduction current up to 100-300MAASHATA 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.Aswalling Aswalling Optocoupler Tester Optocoupler Test Detection Tool Optocoupler Online Test Module Optocoupler Electronic Repai After many hardware updates and parameter modifications, the current generation is very easy to use. As long as the indiJectse Jectse Industrial Grade Relay USB TTL Control Relay Optocoupler Isolation for Smart Home Automation ABSDurable [RUGGED INDUSTRIAL RELAY] Enjoy easy manipulation with this durable relay that provides quick response and security withPhipps Electronics 12V 1 Channel High/Low Relay Module with Optocoupler 1 channel relay module for controlling high-voltage devices.Generic 2-Channel DC 24V 30A Relay Board Module Optocoupler Isolation High/Low Trigger ⚽The module voltage: 5V, 12V, 24V are available.Phipps Electronics 12V 2 Channel High/Low Relay Module with Optocoupler 2-channel relay module for controlling high-voltage devices.Cryfokt Cryfokt 30A High Power Two Way Relay Module with Miniature Optocoupler for Stable Performance, Black Barrier Terminal, I [CUSTOMIZABLE Actuator] Choose between high/low level Actuator options for flexible usage.HUAREW HUAREW 1-channle 5V Relay Module with optocoupler Isolation Supports high and Low Level triggering (Pack of 10) Convenience: The relay board is designed with 1 interface, humanized design, input and output terminals, and convenientPhipps Electronics 12V 2 Channel High/Low Relay Module with Optocoupler 2-channel relay module for controlling high-voltage devices.Cryfokt Cryfokt 30A High Power Two Way Relay Module with Miniature Optocoupler for Stable Performance, Black Barrier Terminal, I [CUSTOMIZABLE Actuator] Choose between high/low level Actuator options for flexible usage.Kaifucy Kaifucy 2X Optocoupler Tester Online Test Detection Tool for Electronic Repair Special 4 Pin Optocoupler Test PCB Repair 4,Measurement to that the optocoupler test board and the measured optocoupler have good contactMiZOELEC 20pcs/lot Optocouplers HCPL-3120 HCPL3120 HP3120 A3120 DIP8 20pcs/lot Optocouplers HCPL-3120 HCPL3120 HP3120 A3120 DIP8Reland Sun 5PCS/LOT IR Infrared Slotted Optical Speed Measuring Sensor Detection Optocoupler Module for Motor Test Reland SunReland 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 TransmiDONGKER Optocoupler Isolation Board, Signal Converter Module Voltage Level Current Voltage Converter Module 80KHz 1-Channel Opto ❤Isolation Voltage:more than 3000V . Input Current:50MA(MAX). Operating Current:more than 1MA. Output Maximum Current:50TENOL TENOL High-performance Optocoupler Isolation Module for 24V Input, NPN Output, 3.3V Size: 7.4 x 25mm/0.3 x 1inchMellisso Mellisso 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 iByttlerom Byttlerom Optocoupler Tester Optocoupler Test Detection Tool Optocoupler Online Test Module Optocoupler Electronic Repai After many hardware updates and parameter modifications, the current generation is very easy to use. As long as the indi