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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 InsulWaour 
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.LT 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 siDIANN 
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: 5mASING 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.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 3.3KHADBXCP 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 InsulatioJZK JZK PC817C Optocoupler 2.54 mm DIP 4 Pin 4-Pin 4-Pin Photo Coupler for Mounting, High Density Mounting Type Optocoupler These optocouplers are industry standard and are very easy to use. Ideal for use as a die, strip or bread board and inexLXJLXD 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 relLT 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 transmissionDIANN 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: 5mAZopsc 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 iEMSea 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, NESomkaco 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 cNikovoke 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 milliseconPhefop 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.DONGKER Optocoupler Isolation Board, 8CH Optocoupler Isolation Module DC 3.3V 5V 8-Channel PNP NPN Low High Level Output Signal Optocoupler isolation control.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 BoardYIQFOCA 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 mmReland 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 BoardSenzooe 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 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 BoardDcnhfdsw Dcnhfdsw IR Infrared Sensor Module 10PCS Slotted Optical Optocoupler Speed Measuring Photo Interrupter Motor Sensor Modu Versatile Power Compatibility: Operating efficiently on a voltage range from 3.3V to 5V, this module offers flexible intELEGOO 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.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 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 TransmiRivermidfish 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 suitabl25% Off Reland 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 TriggerCHICIRIS 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.Domary 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 wiringJimcat 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 ModulVOANZO 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,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 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 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 / 10AReland 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 RelayCGTOLOS 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.DONGKER 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 leEujgoov 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 ideTTOCAR Optocoupler Isolation Board, 8 Channel Driver Photoelectric Isolated Module PCB Opto Isolator Module 817 3.6‑30V for Iso HIGH LEVEL OR PULL DOWN OUTPUT: Whether the output terminal is high level output or pull down output can be realized thrDIANN 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,Reland 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 / 10AMorelian 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.AKLOSIPY 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 disUtopially Utopially Optocoupler Tester Optocoupler Test Detection Tool Online Test Module Electronic Repair Tool for 4-Pin Optocou 1. Test to confirm that the board under test is turned off and the electrolytic capacitors on the motherboard are fullyReland Sun DC 5V 12V 24V 1 Channel Relay Module 30A with optocoupler Isolation high and Low Level Trigger Relay Module (5V) Reland SunECSiNG 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 saferTIKATARER 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.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, stXPOOP XPOOP 100pcs Optocoupler PC817C Optocoupler 2.54mm Spacing 4 Pins for DIY DIP-4, PC817C Optocoupler Single Channel, PC81 Material: ? The 4-pin optocoupler is made of high-quality PC material, small and lightweight, has a high impact resistanYechiry 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 controUtopially Utopially Optocoupler Tester Optocoupler Test Detection Tool Online Test Module Electronic Repair Tool for 4-Pin Optocou 2. Confirm the optocoupler PIN1 (the pin with a small dot on the test board also has a corresponding pin)Reland Sun DC 5V 12V 24V 1 Channel Relay Module 30A with optocoupler Isolation high and Low Level Trigger Relay Module (12V) Reland SunGebildet 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 VoltagDomary 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.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 higDcnhfdsw Dcnhfdsw Optocoupler Tester Optocoupler Test Detection Tool Online Test Module Electronic Repair Tool for 4-Pin Optocoup 3. Connect the optocoupler test board to the USB power cord, and test the optocoupler with the test board probe contactReland Sun Reland Sun 10pcs PC851 DIP-4 PC851XNNSZ0F DIP PC851XJ0000F DIP4 optocoupler 10pcs PC851 DIP-4 PC851XNNSZ0F DIP PC851XJ0000F DIP4 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 iEujgoov 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,Generic 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.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 interfacesReland Sun Reland Sun 10pcs H11A817B DIP-4 H11A817 817B optocoupler 10pcs H11A817B DIP-4 H11A817 817B optocouplerUtopially Utopially PWM Control Switch MOSFET 8 Channel Microcontroller PLC Amplification Field-Effect Drive Tube Optocoupler Isol Power supply mode: DCELEGOO 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 10NOYITO 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 optocouplercizihuu 1pcs PC817 Optocoupler Isolation Board Voltage Converter Adapter Module,8 Way Jumper Cap Can Achieve Output Port Is High POtential Or Pull Down OutputNOYITO NOYITO 4-Channel Relay Module 5V 12V 24V High Low Level Trigger with Optocoupler Isolation Relay Load AC 250V 10A DC 30V 4-Channel High Low Level Trigger With Optocoupler Isolation Relay Module, relay NO interface maximum load: AC 250V/10A,Dcnhfdsw Dcnhfdsw Optocoupler Tester Online Test Detection Tool for Electronic Repair Special 4 Pin Optocoupler Test PCB Repair 1, test to confirm that the board under test has been powered off, and the electrolytic capacitors of the motherboard dacizihuu 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 OutputJenngaoo Opto-isolator Module, 1 Channel Optocoupler Insulation Board, Optoelectronic Signal Isolation and Anti-interference Modu HIGH QUALITY --- The optocoupler insulation module is made of high quality material and can be used to detect the presenGeneric Imported TLP2745 SOP6 Patch Drive optocoupler optocoupler SOP-6 Package contents:TLP2745 SOP6 (1pieces)Dcnhfdsw Dcnhfdsw 3X Optocoupler Tester Optocoupler Test Detection Tool Online Test Module Electronic Repair Tool for 4-Pin Optoc Features: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 ProtectionReland Sun IR Infrared Slotted Optical Speed Measuring Sensor Detection Optocoupler Module for Motor Test Reland SunFafeicy 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.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.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 TransmiASHATA 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.DIYables 2 Channel 5V Relay Module for Arduino, ESP32, ESP8266, Raspberry Pi - Optocoupler Isolation, High/Low Level Trigger - 2p 2 CHANNEL RELAY MODULES (5V) - Includes two 2-channel relay modules with terminal blocks for easy wiring, perfect for coDcnhfdsw Dcnhfdsw 2Pcs Optocoupler Tester Optocoupler Test Detection Tool Optocoupler Online Test Tool Optocoupler Electronic Rep Three test methods: plug-in test pad, patch test pad, probe on/offline test.Rakstore 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-24VBadafaci 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, protecGeneric 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 voTbest 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 anMajosta Electronic Components: A Beginner’s Guide To Diodes, Resistors, Capacitors, Transistors, Inductors, Integrated Circuits, Generic 2-Channel DC 5V 30A Relay Board Module Optocoupler Isolation High/Low Trigger ⚽The module voltage: 5V, 12V, 24V are available.NOYITO NOYITO PC817 4-Channel Optocoupler Isolation Board Voltage Converter Adapter Module 3.6-30V Driver Photoelectric Isolate 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.DollaTek 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.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.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, 1NOYITO NOYITO TLP281 4-Channel Optocoupler Isolation Board for High and Low Level Optocoupler Isolation Expansion Board (Pack o TLP281 4 Channel Optical Coupler Isolation ModuleUtopially Utopially 1 Channel Way Optocoupler Isolation Module PC817 3V-5V Photoelectric Isolator Rail Holder PLC Drive Motor Boar Type:1 Channel Way Optocoupler Isolation ModuleEacam 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.