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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 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 
10PCS 1-Channel PC817 Optocoupler Isolation Module 12V Photoelectric Isolator 10PCS 1-Channel PC817 Optocoupler Isolation Module 12V Photoelectric IsolatorKHADBXCP 
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 triggeringEMSea 
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, NEZopsc 
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 iReland 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 BoardDomary 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.EMSea 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.Sitojart Star 10Pcs 3-5V 1-Channel PC817 Optocoupler Isolator 10Pcs 3-5V 1-Channel PC817 Optocoupler IsolatorNikovoke 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 milliseconCreate 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 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 TriggerELEGOO 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.Reland 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 TransmiJimcat 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 ModulPhefop 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.EC 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 suitablFafeicy 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.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 OpticalcouplerYINETTECH 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 moDIANN 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: 5mAReland 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 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 BoardDIANN 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: 5mAReland Sun 5V 9V 12V 24V 1 Channel Relay Module With Optocoupler Isolation Support High or Low Level Trigger (5V) Module uses genuine high quality relay, normally open interface maximum load: AC 250V / 10A, DC 30V / 10ACryfokt Cryfokt Optocoupler Isolation Board 8 Channel Voltage Detection Module AC for DIY PCB Material [VERSATILE PLC CONNECTION] Easily connect to PLC input, detect AC presence, and ensure reliable performance with 24V powRakstore Rakstore 2pcs 1 Channel Way Optocoupler Isolation Module PC817 EL817 12V Photoelectric Isolator Rail Holder PLC Drive Mo Input signal voltage: DC 12V；Output signal voltage: DC 1.8V-24VReland 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 10pcs H11A817B DIP-4 H11A817 817B optocoupler 10pcs H11A817B DIP-4 H11A817 817B optocouplerPhipps Electronics 5v 2 Channel Relay Module with Optocoupler 5V 2 Channel Relay Module with OptocouplerHailege Hailege AC 220V Optocoupler Module (1 Channel) AC Optocoupler Alternating Current Detect Module 3-5V or PLC 24V Level Po It can be powered by 3-5V or PLC 24V LevelReland Sun 5PCS 5V 9V 12V 24V 1 Channel Relay Module with Optocoupler Isolation Support High or Low Level Trigger (9V) 5PCS 5V 9V 12V 24V 1 Channel Relay Module with Optocoupler Isolation Support High or Low Level TriggerGeneric 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.ZUUOZBYY ZUUOZBYY 4 Channel Optocoupler Isolation Module PLC Signal Voltage Conversion Board DST‑1R8P‑N This product is a 4 channels optocoupler isolation module, the limit conversion frequency is 20KHZNOYITO NOYITO 4-Channel Optocoupler Photoelectric Isolator Module Level Voltage Converter Module PLC Signal Converter Module PN NOYITO 4-Channel Optocoupler Photoelectric Isolator Module Level Voltage Converter Module with high quality optocouplerAKLOSIPY 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 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 OptocouplerReland Sun IR Infrared Slotted Optical Speed Measuring Sensor Detection Optocoupler Module for Motor Test Reland SunSGerste SGerste 6N137 DIP8 Optocoupler Isolation Module Output 5V NPN Input 3.3V 5V 12V 24V DC - 12V DC, as described Optocoupler: 6N137 DIP8Sitojart Star 10Pcs 12V 1-Channel PC817 Optocoupler Isolator 10Pcs 12V 1-Channel PC817 Optocoupler Isolatorcizihuu 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 Outputcizihuu 1pcs PC817 Optocoupler Isolation Board Voltage Converter Adapter Module,8 Way Jumper Cap Can Achieve Output Port Is High POtential Or Pull Down OutputGeneric 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.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 ProtectionGYZOUKA GYZOUKA DC Motor Rotation Controller Forward Reverse Relay Switch Module Optocoupler Coupling Low Power Consumption for [Optocoupler Coupling] Resists transient interference, providing stable performance.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 saferNOYITO NOYITO PC817 4-Channel Optocoupler Isolation Board Voltage Converter Adapter Module 3.6-30V Driver Photoelectric Isolate Generic 2-Channel DC 5V 30A Relay Board Module Optocoupler Isolation High/Low Trigger ⚽The module voltage: 5V, 12V, 24V are available.Adoorniequea EL357N-C Optocoupler Isolation Module Signal Level Convert PNP 5V Generic 4 Channel DC 12V Relay Module with Optocoupler Isolation Relay Control Board Maximum 250V 10A and DC30V 10A.Phipps Electronics 5v 1 Channel Low Level Relay Module with Optocoupler 5V 1 Channel Low Level Relay Module 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.TOPINCN 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.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 Signal1PZ 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 devicesASHATA 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.Utopially Utopially 5X Optocoupler Tester Optocoupler Test Detection Tool Optocoupler Online Test Module Optocoupler Electronic Re Before testing, the motherboard must be powered off and then discharged. Testing cannot be carried out while the power 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 interfacesOiyagai Oiyagai 4pcs 12V One 1 Channel Relay Module Board Shield with optocoupler Support High and Low Level Trigger The module uses genuine quality relay, normally open interfaces , Maximum load: AC 250V/10A, DC 30V/10A.Shutao 3PCS PC817 4 Channel Optocoupler Isolation Board Voltage Converter 3.6-30V Driver Photoelectric Isolated Module Onboard 4 channel 817 are independent: can achieve different voltage control at then same timeQANYEGN QANYEGN Optocoupler Isolation Board, Optical Isolation Module Limit Switching Frequency 20KHZ 12V to 3.3V 8 Channel Opto HIGHLY ADVANCED SIGNAL CONVERSION: The optical isolation module features sophisticated production technology, allowing fMiZOELEC DC 12V 4CH 4 Channel Relay Module Optocoupler for Arduino ARM AVR DSP PIC MSP AC 250V 10A DC 30V Low Level Signal MCU PL DC 12V 4CH 4 Channel Relay Module Optocoupler for Arduino ARM AVR DSP PIC MSP AC 250V 10A DC 30V Low Level Signal MCU PLTbest 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 anEC Buying EC Buying 5Pcs 24V Optocoupler Isolation Board Optoelectronic Isolator EL817 PC817 Card Rail Bracket Input 3-5 V Optocou 24V optocoupler isolation board with EL817 features, providing a wide input signal voltage range of DC1.8V-24V and a maxZUUOZBYY ZUUOZBYY 817 Optocoupler Anti Jamming Lightweight Portable 2 Channel Optocoupler Isolation Board When encountering the need for isolation control and voltage conversion in actual work, this module will be used.Xiuganpo Xiuganpo Optocoupler Isolation Board Efficient 4 Channel 24V to 5V Voltage Converter Module for Signal Isolation [HIGHLY EFFICIENT VOLTAGE CONVERSION] Convert 24V to 5V with stable performanceReland Sun Reland Sun 10pcs 4N38 4N37 4N36 4N35 4N33 4N32 4N27 4N28 4N25 4N26 DIP-6 IC Optocoupler (4N28) 10pcs 4N38 4N37 4N36 4N35 4N33 4N32 4N27 4N28 4N25 4N26 DIP-6 IC 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.Generic 2-Channel DC 12V 30A Relay Board Module Optocoupler Isolation High/Low Trigger ⚽The module voltage: 5V, 12V, 24V are available.Generic 2-Channel DC 24V 30A Relay Board Module Optocoupler Isolation High/Low Trigger ⚽The module voltage: 5V, 12V, 24V are available.Xiuganpo Xiuganpo MCU/PLC Amplification Four Way Relay Module Optocoupler Isolation Control Panel 30A Terminal for Home Automatio [STURDY CONSTRUCTION] Durable and long-lasting relay module control panel for continuous use.Eosnow 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.LIYJTK Optocoupler Isolation Board 8 Channel Driver Photoelectric Isolated Module 817 3.6‐30V [HIGH LEVEL OR PULL DOWN OUTPUT] Easily switch between high level or pull down output with jumper capDomzhili Domzhili Optocoupler Tester Optocoupler Test Detection Tool Optocoupler Online Test Module Optocoupler Electronic Repair 1. The probe has elasticity, one handed operation, and is fast and efficientCHICIRIS 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.Domzhili 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)Eujgoov Optocoupler Isolated Module Power Supply Isolated Module, TTL Output Module Power Supply Isolated Module, TTL Output Mod Built-in Chip and Module - Built-in stable CH340T USB to serial chip, built-in 500mA self-recovery and 5V isolated powerCryfokt 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.Majosta Electronic Components: A Beginner’s Guide To Diodes, Resistors, Capacitors, Transistors, Inductors, Integrated Circuits, 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 convenientZUUOZBYY ZUUOZBYY Voltage Control Adapter Module 4 Road 817 Optocoupler Anti Interference Photoelectric Isolation Module The jumper hat of the voltage control adapter module can realize the high potential or pull down output of the output poSnblzhef Snblzhef Optocoupler Tester, Optocoupler Test Detection Device for 817 4-Pin TL431 MOS IGBT Transistor With test indicator light.Snblzhef Snblzhef Optocoupler Tester, Optocoupler Test Detection Device for 817 4-Pin TL431 MOS IGBT Transistor Bold and hardened test pin with elasticity.TYSQXQ 1pcs D207 ILD207T optocoupler SMD SOP8 Dual-Channel optocoupler Model Number: ILD207TGeneric 4 Channel Relay Module 30A Load t with Optocoupler Isolation Supports High and Low Triger 5V 12Volt 24Volt Optional Mult 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 indiDONGKER 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:50Eacam 4-Channel, DC 12V 30A Relay Module Control Board with Optocoupler Isolation, High/Low Trigger for DC 30V 30A or AC 30A [Powerful Control Board] 4-Channel, dc 12v 30a relay module with optocoupler isolation for stable performance.Phipps Electronics 12V 1 Channel High/Low Relay Module with Optocoupler 1 channel relay module for controlling high-voltage devices.Hosyond Hosyond 4Pack 4 Channel DC 5V Relay Module with Optocoupler Relay Board for Arduino Raspberry Pi MEGA2560 The power supply voltage of the relay module is DC5V. The maximum output load is AC250V 10A and DC30V 10A.TENOL TENOL High-performance Optocoupler Isolation Module for 24V Input, NPN Output, 3.3V Size: 7.4 x 25mm/0.3 x 1inchKaifucy Kaifucy 2X Optocoupler Tester Online Test Detection Tool for Electronic Repair Special 4 Pin Optocoupler Test PCB Repair 2, confirm the optocoupler pin 1 (with a small dot on the foot test board also has the corresponding 1 feet of the logo)Daiilg Daiilg Optocoupler Tester Optocoupler Detection Tool Optocoupler Online Module Optocoupler Electronic Repair Tool After many hardware updates and parameter modifications, the current generation is very easy to use. As long as the indiPhipps Electronics 12V 2 Channel High/Low Relay Module with Optocoupler 2-channel relay module for controlling high-voltage devices.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 contactJustivana Justivana Optocoupler Tester Optocoupler Detection Tool Optocoupler Online Module Optocoupler Electronic Repair Tool Before testing, the motherboard must be powered off and then discharged. Testing cannot be carried out while the power i