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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 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 iSING 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.Reland 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 BoardSitojart Star 
10Pcs 3-5V 1-Channel PC817 Optocoupler Isolator 10Pcs 3-5V 1-Channel PC817 Optocoupler IsolatorEMSea 
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, NEReland 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 TriggerSenzooe 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 InsulCreate 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 Reland Sun 10pcs H11A817B DIP-4 H11A817 817B optocoupler 10pcs H11A817B DIP-4 H11A817 817B optocouplerDIANN 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: 5mARivermidfish AU 10PCS 1-Channel PC817 Optocoupler Isolation Module 12V Photoelectric Isolator 10PCS 1-Channel PC817 Optocoupler Isolation Module 12V Photoelectric IsolatorEC 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 suitablNikovoke 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 milliseconRivermidfish 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 OpticalcouplerECSiNG 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 PC851 DIP-4 PC851XNNSZ0F DIP PC851XJ0000F DIP4 optocoupler 10pcs PC851 DIP-4 PC851XNNSZ0F DIP PC851XJ0000F DIP4 optocouplerReland 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 TriggerKHADBXCP 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 triggeringReland 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 TransmiZoeyilan 4 Channel Optocoupler, Photoelectric Isolator Module, Level Voltage Converter Module, PLC Signal Converter Module for Is VOLT CONVERTER: Efficiently converts 24V to 5V with the help of an optocoupler isolator, ensuring stable working performJimcat star 5PCS PC817 2 Channel Optocoupler Insulated Circuit Board Voltage Converter Adapter Module 3.6-30V Driver Light Insulatio 5PCS PC817 2 Channel Optocoupler Insulated Circuit Board Voltage Converter Adapter Module 3.6-30V Driver Light InsulatioMorelian Morelian 4-Channel PWM MOSFET Module PLC Amplifier Circuit Board Driver Module 3-20V to 3.7-27VDC 10A, Optocoupler, Isol [Signal Indicator] Provides clear indication of input/output signals.Reland 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 BoardCHICIRIS 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.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 ModulNOYITO 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 optocouplerSenzooe 5PCS PC817 4 Channel Optocoupler Insulated Circuit Board Voltage Converter Adapter Module 3.6-30V Driver Light Insulatio 5PCS PC817 4 Channel Optocoupler Insulated Circuit Board Voltage Converter Adapter Module 3.6-30V Driver Light InsulatioGikfun Gikfun OPTOCOUPLER DIP-4 PC817C PC817 for Arduino Diy (Pack of 20pcs) AE1143 Gikfun Packing 20pcs OPTOCOUPLER DIP-4 PC817C PC817DIANN 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: 5mAKHADBXCP 5Pcs 12V 8 Channel Relay Shield Interface Board with Optocoupler 5Pcs 12V 8 Channel Relay Module Interface Board with OptocouplerNOYITO 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 optocouplerReland 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 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 OptocouplerRakstore 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-24VTOPINCN 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 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 / 10ASitojart Star 10Pcs 12V 1-Channel PC817 Optocoupler Isolator 10Pcs 12V 1-Channel PC817 Optocoupler IsolatorYIQFOCA 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 mmHaofy Haofy Compact Optocoupler Isolation Module 24V to 5V PLC Level Voltage Converter for Convenient Installation, 4 Channel [STABLE VOLTAGE CONVERSION] Consistent 24V to 5V conversion for optimal performanceEacam 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.Generic 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.cizihuu 1pcs PC817 Optocoupler Isolation Board Voltage Converter Adapter Module,8 Way Jumper Cap Can Achieve Output Port Is High POtential Or Pull Down Outputcizihuu 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 OutputASHATA 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.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 SignalReland Sun IR Infrared Slotted Optical Speed Measuring Sensor Detection Optocoupler Module for Motor Test Reland SunReland 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 ProtectionAKLOSIPY 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 disGeneric Imported TLP2745 SOP6 Patch Drive optocoupler optocoupler SOP-6 Package contents:TLP2745 SOP6 (1pieces)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 performanceAdoorniequea EL357N-C Optocoupler Isolation Module Signal Level Convert PNP 5V Generic Generic Optocoupler Isolation Module Efficient Voltage Detect Board for PLC Access, Testers Material, for Engineers and [HIGHLY EFFICIENT TTL LEVEL OUTPUT] - Easily detect with a microcontroller, with 3-5V power supply.DIGISHUO DIGISHUO 2pcs 5V 1 Channel Relay Module Relay Switch with OPTO Isolation High Low Level Trigger (2Pcs 5V 1 Channel Relay The module uses genuine quality relay, normally open interfacesGeneric 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.Domary Domary 8 Channel Optocoupler Relay Module Board High & Low 5V/12V/24V, for Versatile Applications (5V) 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.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,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.CHENBO 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 interfacesZUUOZBYY 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 20KHZGeneric 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 voFafeicy 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.Domzhili 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 efficientTbest 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 anMiZOELEC 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 PLELEGOO 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 10Generic 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.xelea xelea 10Pcs PCB Board Through Hole PC817C PC817 EL817 817C Optocoupler DIP-4 4 pins, dual row, 2.54mm pitch.Kaifucy Kaifucy 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 iZUUOZBYY 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.TYSQXQ 1pcs D207 ILD207T optocoupler SMD SOP8 Dual-Channel optocoupler Model Number: ILD207TGeneric 2-Channel DC 5V 30A Relay Board Module Optocoupler Isolation High/Low Trigger ⚽The module voltage: 5V, 12V, 24V are available.1PZ 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 devicesGeneric 10pcs Imported PC356 optocoupler Patch SOP4 Optical Isolator optocoupler 356 optocoupler SOP-4 Package contents:PC356 SOP4 （10pieces）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 convenientSluffs 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.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.Generic 5PCS/LOT AQH3223 Optocoupler DIP-7 Optoisolator Optocoupler AQH3223 DIP-7 （5pieces）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.X psblty for 10pcs PS2801-4 SOP-16 Optocoupler - High-Speed Isolation for Circuit Protection PS2801-4 optocouplers in a convenient 10pcs lot for your electronic projects.Generic FODM452 optocoupler M452 SMD SOP5 optocoupler Imported chip SOP-5 Package contents:FODM452 SOP5 (1pieces)Oiyagai 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.Ganbui Ganbui Optocoupler Tester Optocoupler Detection Tool Optocoupler Online Tool for 817 4-Pin TL431 MOS IGBT Transistor It uses Type-C interface, No battery, directly plug in and use.Generic ACPL-C870 HCPL-C870 SMD optocoupler Isolator optocoupler Driver chip C870 SOP-8 Package contents:ACPL-C870 SOP-8(1pieces)Majosta Electronic Components: A Beginner’s Guide To Diodes, Resistors, Capacitors, Transistors, Inductors, Integrated Circuits, Majosta Electronic Components: A Beginner’s Guide To Diodes, Resistors, Capacitors, Transistors, Inductors, Integrated Circuits, Generic PC910 PC910L in-line optocoupler DIP8 optocoupler Isolator Imported chip DIP-8 Package contents:PC910 DIP8 (1pieces)Generic 2-Channel DC 12V 30A Relay Board Module Optocoupler Isolation High/Low Trigger ⚽The module voltage: 5V, 12V, 24V are available.Omabeta Omabeta 1PCS 5 Axis CNC Control Board, 32-bit STM Microcontroller with Optocoupler Isolation, PWM Output, USB Motion Con BROAD COMPATIBILITY: The control board set boasts extensive compatibility, it supports for Windows XP, for WIN7, for WINHailege 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 LevelTENOL TENOL High-performance Optocoupler Isolation Module for 24V Input, NPN Output, 3.3V Size: 7.4 x 25mm/0.3 x 1inchGeneric 2-Channel DC 24V 30A Relay Board Module Optocoupler Isolation High/Low Trigger ⚽The module voltage: 5V, 12V, 24V are available.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 contactGeneric HCNW4506 SMD optocoupler SOP8 Large Volume optocoupler Imported chip SOP-8 Package contents:HCNW4506 SOP8 (1pieces)