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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 reliReland 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 TriggerBest Value 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 3.3Senzooe 
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 InsulYINETTECH 
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 moReland 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 OptocouplerECSiNG 
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 saferYIQFOCA 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 mmEC 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 suitablEMSea EMSea 5pcs 3V Relay Power Switch Board 1 Channel Optocoupler Relay Module Isolated Drive Control Board for ESP8266 Devel The 3V/3.3V power relay module supports optocoupler insulation control.Reland 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 BoardReland 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 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 OptocouplerEMSea 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.EMSea 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, NEShutao 2Pcs PC817 8 Channel Optocoupler Isolation Board 3.6-30V Driver Photoelectric Isolated Module Voltage Converter Adapter 8 channel optocoupler isolation board is used when it comes to the need for isolation control and voltage conversion.PerGar 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 transistPhipps Electronics 5v 2 Channel Relay Module with Optocoupler 5V 2 Channel Relay Module with OptocouplerSenzooe 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 InsulGikfun Gikfun OPTOCOUPLER DIP-4 PC817C PC817 for Arduino Diy (Pack of 20pcs) AE1143 Gikfun Packing 20pcs OPTOCOUPLER DIP-4 PC817C PC817HOBBYIN HOBBYIN 5PCS 1 Channel Optocoupler Isolation Module,DC12V Optocoupler Isolation Module EL817 Opto PNP NPN Signal Convert Reliable Optocoupler Isolation: The 5 PCS Optocoupler Isolation Board is designed to provide reliable signal isolation a14% Off Vaguelly Vaguelly 5v Single-Channel Relay Module Optocoupler Isolation 12pcs Pack High/Low Level Trigger Support Flexible triggering: high and trigger support provides versatile control options for users,one way relay module,high powShanrya AC Optocoupler Module, Optocoupler Module 3P Terminal Connected to The Microcontroller Input for Workshop for Laboratory Reland Sun 5V 8 Channel Relay Module With Optocoupler 5V 8 Channel Relay Module With OptocouplerReland Sun IR Infrared Slotted Optical Speed Measuring Sensor Detection Optocoupler Module for Motor Test Reland SunMadifei AU 5Pcs 12V 8 Channel Relay Module Interface Board with Optocoupler 5Pcs 12V 8 Channel Relay Module Interface Board with OptocouplerVikye 5pcs 1 Channel Optocoupler Module, 220V AC Green 5pcs Optocoupler Isolation Modules Isolation Module Support PLC 5PCS IN 1 SET: Including 5pcs optocoupler isolation modules, small and compact, easy to install and replace, has a wideCHENBO 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 interfacesZopsc 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 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 TransmiMadifei AU 3PCS PC817 8 Channel Optocoupler Insulated Circuit Board Voltage Converter Adapter Module 3.6-30V Driver Light Insulatio 3PCS PC817 8 Channel Optocoupler Insulated Circuit Board Voltage Converter Adapter Module 3.6-30V Driver Light InsulatioCHENBO 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/10AReland Sun Reland Sun 10pcs LTV-814 DIP-4 LTV814 DIP LTV-814A compatible optocoupler PC814 DIP4 10pcs LTV-814 DIP-4 LTV814 DIP LTV-814A compatible optocoupler PC814 DIP4QANYEGN QANYEGN Channel Optical Isolation Module, Optocoupler Isolation Board 24V to 5V PLC Level Voltage Converter Module 4 Cha VOLT CONVERSION : The optocoupler isolation board effectively converts 24V to 5V, ensuring stable and reliable performanMadifei AU 5Pcs 5V 8 Channel Relay Module Interface Board with Optocoupler 5Pcs 5V 8 Channel Relay Module Interface Board with OptocouplerReland 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 OptocouplerReland Sun Reland Sun 10pcs 4N38 4N37 4N36 4N35 4N33 4N32 4N27 4N28 4N25 4N26 DIP-6 IC Optocoupler (4N36) 10pcs 4N38 4N37 4N36 4N35 4N33 4N32 4N27 4N28 4N25 4N26 DIP-6 IC OptocouplerReland Sun Reland Sun 10pcs 4N38 4N37 4N36 4N35 4N33 4N32 4N27 4N28 4N25 4N26 DIP-6 IC Optocoupler (4N37) 10pcs 4N38 4N37 4N36 4N35 4N33 4N32 4N27 4N28 4N25 4N26 DIP-6 IC OptocouplerReland Sun Reland Sun 10pcs 4N38 4N37 4N36 4N35 4N33 4N32 4N27 4N28 4N25 4N26 DIP-6 IC Optocoupler (4N38) 10pcs 4N38 4N37 4N36 4N35 4N33 4N32 4N27 4N28 4N25 4N26 DIP-6 IC OptocouplerReland Sun Reland Sun 10pcs 4N38 4N37 4N36 4N35 4N33 4N32 4N27 4N28 4N25 4N26 DIP-6 IC Optocoupler (4N33) 10pcs 4N38 4N37 4N36 4N35 4N33 4N32 4N27 4N28 4N25 4N26 DIP-6 IC OptocouplerReland Sun Reland Sun 10pcs 4N38 4N37 4N36 4N35 4N33 4N32 4N27 4N28 4N25 4N26 DIP-6 IC Optocoupler (4N27) 10pcs 4N38 4N37 4N36 4N35 4N33 4N32 4N27 4N28 4N25 4N26 DIP-6 IC OptocouplerPhipps Electronics 12V 8 Channel High/Low Relay Module with Optocoupler 8-channel relay module for controlling high-voltage devices.Phipps Electronics 5v 1 Channel Low Level Relay Module with Optocoupler 5V 1 Channel Low Level Relay Module with OptocouplerBainiao Bainiao 10Pcs PCB Board Through Hole PC817C PC817 EL817 817C Optocoupler DIP-4 4 pins, , 2.54mm pitch.ULTECHNOVO ULTECHNOVO 2pcs 40a Single Phase Solid State Relay Module Optocoupler High Precision Stable Operation Protection Cover I Single phase semi-conductor relay:can withstand frequent frequency control and precise control of ,thermostat solid statANKROYU ANKROYU Optocoupler Isolating PLC Relay, MRI 3.3D48 DC Optocoupler PLC Relay, 3.3VDC Output 3 48VDC Input Din Rail Ultra 【Enhanced Visibility】This device features a yellow LED indication, providing enhanced visibility for easy identificationAnlayliay Anlayliay Optocoupler Tester Online Detection Tool for Electronic Repair Special 4 Pin Optocoupler PCB Repair Blue 1, to confirm that the board under has been powered off, and the electrolytic capacitors of the motherboard days have beRakstore 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 10pcs 4N38 4N37 4N36 4N35 4N33 4N32 4N27 4N28 4N25 4N26 DIP-6 IC Optocoupler (4N25) 10pcs 4N38 4N37 4N36 4N35 4N33 4N32 4N27 4N28 4N25 4N26 DIP-6 IC OptocouplerBognajin Bognajin Optical Isolation Module Limit Switching Frequency 20kHz 12V to 3.3V 8 Channel Optocoupler PLC Signal Converter 【Versatile Input Options】: Supports common anode, common cathode, and differential signal inputs.Reland Sun Reland Sun 10pcs 4N38 4N37 4N36 4N35 4N33 4N32 4N27 4N28 4N25 4N26 DIP-6 IC Optocoupler (4N32) 10pcs 4N38 4N37 4N36 4N35 4N33 4N32 4N27 4N28 4N25 4N26 DIP-6 IC OptocouplerGeneric 4 Channel DC 12V Relay Module with Optocoupler Isolation Relay Control Board Maximum 250V 10A and DC30V 10A.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.Reland Sun 5V 12V 24V 8 Channel Relay Module Interface Board for 51/AVR/AVR/ARM with Optocoupler Protection (5V) 5V 12V 24V 8 Channel Relay Module Interface Board for 51/AVR/AVR/ARM with Optocoupler ProtectionBinxind Binxind 2X Optocoupler Tester Kit 555 Application Circuit Board Practice Welding DIY Electronic Spare Parts Kit Without Optocouplers, also known as optocouplers, are commonly used electronic components that are difficult to test with ordinaGeneric 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.Beufee Optocoupler, 4 Channel Optocoupler Isolation Board Optocoupler Isolation Module Optocoupler PC 817 Optoisolator Module PRACTICAL: Optocoupler can realize 3.3V or 5V to control the interface of 3.6 to 24V voltage. After the control terminalDomary Power Supply Isolated Module Fast USB to TTL Isolated Serial Optocoupler 3.3V 5V [Fast and ] Featuring high-speed serial port ttl level optocoupler isolation up to 256000bps for efficient and secure daReland Sun 5PCS/LOT IR Infrared Slotted Optical Speed Measuring Sensor Detection Optocoupler Module for Motor Test Reland SunDollaTek DollaTek 2pcs DC 12V Time Delay Relay Module Car Auto Delay Timer Control Switch with Optocoupler Signal Trigger Adjusta Can be used in robots, car light delays, intelligent product development, automation equipment, PLC development, smart hDollaTek DollaTek 2pcs DC 12V Time Delay Relay Module Car Auto Delay Timer Control Switch with Optocoupler Signal Trigger Adjusta Can be used in robots, car light delays, intelligent product development, automation equipment, PLC development, smart hMadifei AU 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 InsulatioKOMBIUDA KOMBIUDA 12pcs Optocoupler Isolated Relay Control Module for Forward Reverse and Light Control High Low Level Trigger Ea Simple connections: user friendly terminal connections make wiring and convenient,optocoupler module,isolation module haMiZOELEC 10pcs/lot DIP optocoupler optocoupler 4N26 EL4N26 DIP6 10pcs/lot DIP optocoupler optocoupler 4N26 EL4N26 DIP6Rivermidfish 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 OpticalcouplerLAPOOH LAPOOH 2-Channel DC 5V 30A Relay Board Module Optocoupler Isolation High/Low Trigger The module voltage: 5V, 12V, 24V are available.Smartmiao AU 5PCS 12V 1 Channel Relay Module with Optocoupler Isolation Support High or Low Level Trigger 5PCS 12V 1 Channel Relay Module with Optocoupler Isolation Support High or Low Level TriggerTEHAUX TEHAUX 12pcs State Relay Module with Optocoupler Isolation for Voltage Controlled Applications User Friendly Terminals D Optocoupler isolation: features optocoupler isolation to protect the control circuit and the controlled circuit, ensurinPhipps Electronics 12V 1 Channel High/Low Relay Module with Optocoupler 1 channel relay module for controlling high-voltage devices.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.Ysyaxsyt Ysyaxsyt 2 PCS 5V One Channel Relay Module Relay Switch with Optocoupler Isolation Support High Low Level Trigger 2.Fault-tolerant design, even if the control line is broken, the relay not operate;Phipps Electronics 12V 2 Channel High/Low Relay Module with Optocoupler 2-channel relay module for controlling high-voltage devices.HALJIA HALJIA 3PCS 2 Channel Relay Module - 5V Relay Board Expansion Board High Performance Accessories with Optocoupler for Ra The relay uses high quality material, single pole and double throw. a common end, a normal open end and a normal closedUIOTEC DC 12V 2CH 2 Channel Isolated Optocoupler High/Low Level Trigger Relay Module** Generic 2-Channel DC 5V 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.Tiiyee 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 higGeneric ACPL-C870 HCPL-C870 SMD optocoupler Isolator optocoupler Driver chip C870 SOP-8 Package contents:ACPL-C870 SOP-8(1pieces)STOBOK STOBOK 12 Pack 5v Relay Module Optocoupler Isolation Universal Trigger Relay Board Simple connections: user friendly terminal connections make wiring straightforward and convenient,delay relay module,timCOHEALI COHEALI 12pcs Optocoupler Isolation Relay Module for Level Triggering Easy Wiring Expansion Board for Purpose Voltage Co Enhanced safety: the optocoupler isolation function enhances the safety between the control and controlled circuits,optoSTOBOK STOBOK 12 Pack 5v Relay Module Optocoupler Isolation Universal Trigger Relay Board Simple connections: user friendly terminal connections make wiring straightforward and convenient,delay relay module,timPhipps Electronics 12V 4 Channel High/Low Relay Module with Optocoupler 4-channel relay module for controlling high-voltage devices.Jectse 8 Channel Relay Module,PLC Relay Trigger Module Controller with Optocoupler Isolation Blue Board,for 51/AVR/ARM Platform Support all microcontroller control. Industrial field; PLC control; home intelligent control.TENOL TENOL High-performance Optocoupler Isolation Module for 24V Input, NPN Output, 3.3V Size: 7.4 x 25mm/0.3 x 1inchAzuocn 12V 16-Channel Relay Interface Board Module Optocoupler LED LM2576 Power for Arduino DIY Kit PiC ARM AVR 12V 16-Channel Relay interface board, and each one needs 15-20mA Driver Current1PZ 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 devicesComimark Comimark 10Pcs LCR0203 LCR-0203 Linear optocoupler DIP-4 This is LCR0203 LCR-0203 linear optocoupler DIP-4Phipps Electronics 12V 6 Channel High/Low Relay Module with Optocoupler 6-channel relay module for controlling high-voltage devices.Domary 3 Channel Relay Module High Voltage Relay Board Isolated Optocoupler High Low Level Control for Home Automation (12v) [Convenient Interface Design] With a user-friendly interface, all connections can be easily made through terminal wiringMachineMid 10 Pcs LTV847 optocoupler LTV847S SOP16 SMD Package 10 Pcs LTV847 optocoupler LTV847S SOP16 SMD packageMingzhe High Power Two Way Bidirectional Optocoupler Isolation Relay Module 30A YYG 3 for Home Automation (12VDC) [Stable and ] The 9.5mm black barrier terminal and standard 30a terminal ensure stability and reliability in .VOGURTIME 8 Channal 5V Relay Module with optocoupler Isolation high and Low Level Trigger Relay Red Board High Quality Module - the relay module uses genuine high-quality relays. The maximum load of the frequently opened interMingzhe High Power Two Way Bidirectional Optocoupler Isolation Relay Module 30A YYG 3 for Home Automation (5VDC) [Stable and ] The 9.5mm black barrier terminal and standard 30a terminal ensure stability and reliability in .DollaTek DollaTek High-Speed Isolation USB to TTL Serial Module Power Isolation Optocoupler Isolation Onboard 500mA self-recovery fuse and 5V isolated power module to protect your computer from damageDaiilg 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 indiJustivana 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 iMiZOELEC 20pcs/lot Optocouplers HCPL-3120 HCPL3120 HP3120 A3120 DIP8 20pcs/lot Optocouplers HCPL-3120 HCPL3120 HP3120 A3120 DIP8Suesacy Suesacy Optocoupler Tester Optocoupler Detection Tool Optocoupler Online Module Optocoupler Electronic Repair Tool It uses a type-c interface, which is rechargeable and the pins can be replaced.Mellisso 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 iUIOTEC 5V 1-Way Relay Module with optocoupler 1-Channel Relay Expansion Board High and Low Trigger with LED Warning lamp **