The advantages of a relay lie in its lower inertia of the moving, stability, long-term reliability and small volume. The collection that comprising chosen picture and the best amongst others. The Android Blynk app sends the serial data to the Wi-Fi Node MCU by clicking ON button. SPECIFICATION 5V 2-Channel Relay interface board, and each one needs 15-20mA Driver Current Equiped with high-current relay, AC250V 10A ; DC30V 10A Standard interface that can be controlled directly by microcontroller (Arduino , 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL logic) Indication LED’s for Relay output status It activates on low level WHAT'S IN THE PACKAGE 1 x 2-Channel 5V Relay Module Relays ship same day Optocoupler is a component that transfers electrical signals between two state of isolation circuits by using light, and prevent high voltage from affecting the system receiving the signal. In the Or circuit shown in Figure 1.11, one of the relays to which the inputs A, B, C are connected ensures that the bobbin’s energy is lit by the output lamp, that is, the output is logic 1. Pull-down circuit for the avoidance of malfunction. The main concept of Home Automation using Raspberry Pi (or any other platform like Arduino) is to control different electrical loads using Raspberry Pi. Power supply indicator lamp. 4 years ago, it is npn transistor you can see in breadboard schematics, looking to build an induction fired relay, got any ideas, there is usually an optocoupler on relay modules to isolate the signal from the coil spikes. The onboard white LED is connected with the IO4. The collection that comprising chosen picture and the best amongst others. 3 years ago. I have used the ATMEGA328P micro controller to control the 5 channel relay module. We successfully made our Diy relay module. The four and eight channel versions even have optical isolation to protect your DuinoTECH. Relays – I/O Relay Module Racks are in stock at DigiKey. Reply ☺. 1 Channel Relay Module Circuit Diagram It also will feature a picture of a sort that could be seen in the gallery of 1 Channel Relay Module Circuit Diagram. The diagram shows wiring for a 2-channel relay module, wiring a different number of channels is similar. Features. A relay is basically a switch which is operated electrically by electromagnet. These handy relay modules provide the easiest way to use your DuinoTECH to switch real world devices. Warning: in this example, we’re dealing with mains voltage. Products in this family are interconnect devices used to create an interface between one or more I/O relay modules and an installation's fixed wiring in order to ease replacement of worn or damaged relays, and/or to incorporate such relays at the juncture between a control signal bus and field wiring. I have also connected the ESP01 WiFi module, 1738 IR receiver to control the relays from Blynk App (Mobile) and Infrared remote. One normally closed contact and one normally open contact. When coil energizes through 5-volt signal, spring attracts contact form normally open position to closed position. 20 projects ; 0 followers ; … ARE00201SL. with relay . Answer In the Nand circuit shown in Figure 1.10, if the coil voltage of any relay is disconnected, current will flow through the normally closed contact. Download . Author. Schematics and circuit diagrams. Additionally, some come with built-in optocoupler that add an extra “layer” of protection, optically isolating the ESP boards from the relay circuit. Order Now! After all parts you collected lets go ahead to the next step. Following are the final circuit boards, which I have already explained in my previous article. To put it simply, it is an automatic switch to controlling a high-current circuit with a low-current signal. AC Light Dimmer Module, 1 Channel, 3.3V/5V logic, AC 50/60hz, 220V/110V . T. TimGavinq New Member. This may damage the Arduino microprocessor. AC Light Dimmer Module, 2 Channel, 3.3V/5V logic, AC 50/60hz, 220V/110V. Soldering wire.3. Why don't you look up how a relay works and then you might understand. With the right darlington can even use yr finger to trigger them :-). The Arduino Relay module allows a wide range of microcontroller such as Arduino, AVR ,PIC, ARM with digital outputs to control larger loads and devices like AC or DC Motors, electromagnets, solenoids, and incandescent light bulbs. Part of such home automation projects is to control an electrical load like a light bulb or a ceiling fan. Now we need to collect some parts that we needed to make the Diy relay module.NOTE : Most of the parts was lying around my home,I used to save little more ¢ here the list of all the parts you needed to do this project:HARDWARE:1. Connect the relay module to the ESP32 as shown in the following diagram. In summary, small currents and voltages provide greater current and voltage control. On the switched circuit side of the module, you’ll see the three switched connection points marked with the diagram shown below (the labels NO, Common, and NC are mine). Hi guys how are you ?I hope you are fine !Are you looking for making a relay board yourself , then your in right place.today i will show you how to make a Diy relay modulethat can be used any purpose . Description: 5V 4-Channel Relay interface board, and each one needs 15-20mA driver current. The AC Dimmer is designed to control the alternating current voltage, which can transfer current up to 600V/16А. IN4001diode.5. Since the relay has 12V trigger voltage we have used a +12V DC supply to one end of the coil and the other end to ground through a switch. In that case, then when the Arduino output pin is high there may be 12V applied to it from the relay module. Now I assume the jumpers allows the relay module to take power from the VCC of the main pin block. The following figure shows the relay module pinout. For this module, a switched connection is made between the first and second connectors or the second … Arduino KY-019 Relay Module is used to control AC circuits, the relay acts as a switch that responds to a signal received from the Arduino, it has an integrated LED that indicates if the signal is high or low. The simple solution is use a module like that as a slave switch to control a separate high-power 12V relay such as an automotive type. With this product, you earn 4 loyalty points. Available in one, four and eight channel versions, these modules can switch up to 10A per channel. Author. In this project, we will make a 4-Channel Relay Driver Module Circuit for relay based applications. don't skip this step , it is necessary to avoid mistakes when soldering into a PCB and check if it is works. We made the Diy relay module on a general purpose PCB. That is the relay control input is pulled to GND by the Arduino digital output pin. SPECIFICATION 5V 2-Channel Relay interface board, and each one needs 15-20mA Driver Current Equiped with high-current relay, AC250V 10A ; DC30V 10A Standard interface that can be controlled directly by microcontroller (Arduino , 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL logic) Indication LED’s for Relay output status It activates on low level WHAT'S IN THE PACKAGE 1 x 2-Channel 5V Relay Module I want to control 230V 15A water pump/motor (inductive load, right?) Then mount all the components and solder it. Aug 1, 2020 #3 rjenkinsgb said: Also depending on the relay and circuit board design, some chinese modules such as the one you link to may not even stand that for very long, as the PCB connections may not be … Quad Channel Relay Board is a simple and convenient way to interface 4 relays for switching application in your project. Figure 6 – Relay connections legend . Here, I’m using the SIM800L and Arduino Nano V3 to develop a nifty one-channel SMS relay. Problems can occur if the relay module is low triggered. Download . How to Use a Relay? Wish List Compare. Available in one, four and eight channel versions, these modules can switch up to 10A per channel. Download the fritzing project file down below( PCB design), Then open the fritzing software(if not download and installed click here ), If you don't know how to use fritzing , click here(complete the tutorial , it almost three parts). Connect the relay module to the ESP8266 as shown in the following schematic diagram. This is the complete circuit diagram for this home automation project. It has a control system and (also called input circuit or input contactor) and controlled system (also called output circuit or output cont actor). The timer has more than twenty different timing functions with optional ability to trigger them by application of input voltage to the trigger wire or opening/closing dry contacts. As a matter of fact, have done that too for waterlevels. Numato Lab’s 2 Channel Programmable Relay Module is a feature rich product that can be programmed with Arduino IDE. Circuit Diagram-Home Automation with ESP8266, Relay Module. 6970622932550. LED(red or green,i used green here)7. I really recommend make a custom pcb because it is more professional and perfect one. Arduino KY-019 Relay Module is used to control AC circuits, the relay acts as a switch that responds to a signal received from the Arduino, it has an integrated LED that indicates if the signal is high or low. That is, wires connected together always bear the same number: the common number designates a condition of electrical commonality (all points bearing the same number are equipotential to each other). 100ohms resistor.4. 1 Channel Relay Module Circuit Diagram picture published and submitted by Admin that preserved inside our collection. 3 projects ; 0 … The above diagram is for relay triggering circuit. 1 Channel Relay Module Circuit Diagram It also will feature a picture of a sort that could be seen in the gallery of 1 Channel Relay Module Circuit Diagram. It reveals the components of the circuit as simplified shapes, and also the power and signal connections in between the tools. Download . It can be controlled directly by microcontroller (Raspberry Pi, Arduino, 8051, AVR, PIC, DSP, ARM, ARM, MSP430) TTL logic. Warning: in this example, we’re dealing with mains voltage. Module power supply consumption：3.3V/100mA, instantaneous current(5us) 450mA. And if you want to drive them with even less current, use a "Darlington Pair" transistor setup and very little current will energize them. great instructable,thank you for sharing..... About: Like to learn and do electronics and hardware stuffs, How to Make a IR Proximity Sensor at Home, CheApR - Open Source Augmented Reality Smart Glasses, "High-Fivey" the Cardboard Micro:bit Robot. In the above circuit, 5V relay is powered by a 9V battery. Multifunctional Timer delay module is a revolutionary circuit with many commonly used timer delay functions. Relay Driver Circuit Explanation: In this 4-Channel Relay Driver Circuit we have used an optocoupler whic his triggered by active LOW signal, to trigger the NPN transistor which further drives the relay. Diagram 1 TYWE2S Module outlet typical circuit. 5 volt relay(i used 6 volt because i need 6 volt relay)2. SKU. Now we have all the parts to make a Diy relay module. 2-Channel Relay Module; Two Small Incandescent Bulbs (for demonstration in the output) Connecting wires; Power Supply; Computer ; Circuit Design. Schematics and circuit diagrams. The figure shows the switched connection configuration for the relay at rest. I just stated such a setup incase you don't have enough sing or source current capability from any microcontroller for such a driver setup. Description 2 channel Relay driver project can be controlled by feeding 2-12V trigger voltage, Very useful project for application like Micro-Controller based projects, Remote controller, Lamp on Off, and any circuits which required isolated high current and high voltage switching by applying any TTL or CMOS level voltage. Need to be careful with the current draw on the relay coil, and if using a number of them this can cause issues.. Also, nice to see a flyback diode in use, good 'ible, but could use a bit more detail on the circuit design, is the transistor npn or pnp.. Relays are most commonly used switching device in electronics. 2.Design specification. How to use a Relay. There are two important parameters of relay, first is the Trigger Voltage, this is the voltage required to turn on the relay that is to change the contact from Common → NC to Common → NO. 3V Relay, 12V Relay, 1-channel Relay module, 4-channel Relay Module. Relay Module (Generic) ... 1-Channel 5v Relay Module, Male to Male Jumper Wires, Male to Female jumper Wires, Bulb Holder, 220v LED Bulb, 5v 2Amp Power Adapter} Schematics. It can be used to control various appliances and equipment with large current. Availability: In stock. This project is a 2 Channel Relay Board. There are hundreds of tutorial available on how to use a "relay module" but I could not find a good one that shows how to use a Relay and not a Relay module. Car Alarm Wiring Autowatch 280rl Wiring Diagram. 1 Channel Relay Module Circuit Diagram have a graphic associated with the other. BC548 transistor.3. Maybe I shld start doing that myself as well. Can you tell me how to go about snubber circuit or point me in right direction?Thank you! You can also notice a diode connected across the coil of the relay, this diode is called the Fly back Diode. If you used a 12V relay like we used in this project Arduino Relay Control, you need to use a separate power supply for relay. http://www.mediafire.com/file/mt8e29312xd4y89/relay+module+circuit+diagram+and+pcb+.rar i am new to the world of electronics and i am still learning i am confused what's he purpose of J1 and J2 in the circuit can anyone please explain? Great, I think everyone (who does electronics) should have build this at least once to learn. If there is a pictures that violates the rules or you want to give criticism and suggestions about 1 Channel Relay Module Circuit Diagram please contact us on Contact Us page. Below given is Relay Driver Circuit to build your own Relay module: Circuit Diagram and Working: In this Arduino Relay Control Circuit we have used Arduino to control the relay via a BC547 transistor. The team also supplies the picture in High Quality Resolution (HD Quality) that may be downloaded by simply way. Now we have all the parts to make a Diy relay module. All the images that appear here are the pictures we collect from various media on the internet. Free Schematic Diagrams. Now we need to test the circuit diagram of the relay module on a breadboard. Screw terminals(3 pols , 2 nos)6. Electromagnetic field generated by a small current is called an element relay that controls one or more key groups (switches on or off) to operate a switchoperating at high power or current . There is no connection between the low voltage circuit operated by the They are so many great picture list that may become your inspiration and informational purpose of 1 Channel Relay Module Circuit Diagram design ideas on your own collections. 243 Reviews Add Your Review. RF Module YK04 with remote ; 4 channel relay; Circuit Diagram . 4 Channel Portable Audio Mixer Music Generator Schematic Using UM66 Laptop Audio-Out Splitter Three Channel Audio Mixer Digital Volume Control Stereo to Mono Converter Based on FET Three Channel Audio Splitter Automotive Brake Light Signal Module Car Battery Saver Car Boot Lamp Warning (ICM7556) Lambda Probe Readout For Carburetor Tuning Lights On! Schematics and circuit diagrams. Qty-+ Add to Cart. This is a 5V 4-Channel Relay interface module, for controlling various appliances, and other equipments with large current. was $2.99 Special Price $1.99. Can I use 6v realy as 5v actually I want oprtate 12v lock using raspberry pi 3 what should I do......? we made the custom PCB for Diy relay module. 1) Plug and pray. Rating: 99 % of 100. HI! its works . 1 Channel Relay Module Circuit Diagram It also will feature a picture of a sort that could be seen in the gallery of 1 Channel Relay Module Circuit Diagram. this step is optional if you are decided to make the module on a custom PCB. Connect the relay module to the ESP32 as shown in the following diagram. don't skip this step , it is necessary to avoid mistakes when soldering into a PCB and check if it is works. Muhammad Ansar. Muhammad Ansar. Coming to the design of the circuit, it is very simple as we used a 5V relay module … Specifications. is it ok with ac component using like a celling fan? Circuit diagram of an electromechanical relay with components are given below: In the above circuit diagram, the 5-volt signal is given to the coil of an electromechanical relay, when the switch is closed, current flows through the coil and energizes the coil. Reply I use Darlington Transistor configurations with water probes to turn pumps on and off. Even you can hookup with your Arduino or raspberry pi else use it for any project you needed a relay module. I have made lots of relay driver circuits over the years. These handy relay modules provide the easiest way to use your DuinoTECH to switch real world devices. Proposed supply current≥300mA. Osoyoo UNO Board (Fully compatible with Arduino UNO rev.3) x 1; 2-Channel Relay Module x 1; Breadboard x 1; Jumpers; USB Cable x 1; PC x 1; Software. Circuit Diagram: Atmega328P Pins Connections. I EXPLAINED IT BEFORE THIS STEP (STEP 2)! High quality & Only 24 Hours Build time. Home Automation is one of the popular DIY Projects that hobbyists and electronics enthusiasts love to work on. Comments. Thanks. The diagram shows the wiring for a 1-channel relay module and 4-Channel Module. Weight. Figure 1. There are several IoT Projects based on ESP8266 WiFi Module but Home Automation . Now we need to make the circuit on a General purpose pcb or custom pcb. hopefully you are enjoy and lastly can find the best picture from our collection that submitted here and also use for suitable needs for personal use. 1 www.handsontec.com Handson Technology User Guide 8 Channel 5V Optical Isolated Relay Module This is a LOW Level 5V 8-channel relay interface board, and each channel needs a 15-20mA It is widely adopted in devices of power protection, automation techno… The Wi-Fi Node read the input data and process it according to program uploaded inside it and generate the output to 4 Chanel Relay Module. The six pins on the left side of the relay module connect high voltage, and the pins on the right side connect the component that requires low voltage—the Arduino pins. Now the time for make the circuit on a general PCB or a custom PCB. For switching we are using a transistor as a switching device. As mentioned above a lot of the relay modules available do not come with circuit diagrams. It costed me about 1$ (USD) to make one.The reason i come up with this tutorial is last week i needed to make a project so fast(its a urgent project for my college) i needed a relay module to finish the last stage of the project, unfortunately i screwed . wooooww!!!!!! The 8 channel relay module has its own optocoupler also called opto-isolator, photocoupler or optical isolator. Yes, I am talking base bias to drive most any relay. Comments. Here i will explain how to make the module on a general purpose PCB!. Breadboard and Jumpers.SOFTWARE:1. It is very easy to build an “SMS-controlled relay” with the help of a cheap GSM modem module and a small microcontroller board. This makes it easy as Arduino can power up the relay directly. This programmability gives this board ultimate flexibility compared to other relay modules where features depend on the preprogrammed firmware and offer limited customizability. How to make countdown timer relay using arduino and 16x2 lcd display by Countdown Timer Relay; Published … Share it with us! The device is, in fact, an “isolated electric switch” that can be controlled through the messaging app on your mobile phone! This is my 4th tutorial on how to drive a RELAY (not a relay module) with an Arduino. The One Channel relay module is controlled using the IO Pin 12 of the ESP32 Camera module. Then do the same you learned from the PCB ETCHING tutorial. FritzingGENERAL TOOLS:1. After etch the PCB . Overview It has a longer life, with a much higher turn on/off speed and no noise. Commonly used in IoT projects to control lights and other electronic appliances. SKU. 1 Channel Relay Module Circuit Diagram have a graphic associated with the other. If you made one please click on I MADE IT button and also post the photo of your finished Diy relay module in comment section. High impedance controller pin. Plus wire in the water, base wire of 3 darlingtons in the water at various levels :-), It never occurred to me to round the corners of the circuit board, but I like the result, it's not clunky- looking like a typical project and indeed does impart a more modular sense to it. Standard TTL Level logic controlled. 2 CHANNEL 5V 10A RELAY MODULE Description The relay module is an electrically operated switch that allows you to turn on or off a circuit using voltage and/or current much higher than a microcontroller could handle. Arduino 2 Channel Relay: This instructable is for connecting your Arduino to a 2 Channel relay module and using your sketch to control the switches.I bought the 2 Relay Module on eBay (for $9.50) to drive a couple of 240V parts (a vacuum cleaner and a rotary engraving tool)… Products in this family are interconnect devices used to create an interface between one or more I/O relay modules and an installation's fixed wiring in order to ease replacement of worn or damaged relays, and/or to incorporate such relays at the juncture between a control signal bus and field wiring. So, i went to a local store to buy one but there is no 5 volt or 6 volt relay module.But fortunately they have the relays , i bought so many(hope i can use like this situation in future :D) .then made one myself.Its cheap and easy , you can save a little bit money by making these Diy relay module . Additional contributors. Power filter capacitor C1 & C2 should be distributed as close to the 3.3V power pin as possible. carefull for wrong connections. 15. Since an inductor (the relay coil) cannot change it’s current instantly, the flyback diode provides a path for the current when the coil is switched off. Free electronics schematic diagrams downloads, electronics CAD software, electronics circuit and wiring diagrams, guitar wiring diagrams, tube amplifier schematics, electronics repair manuals, amplifier layout diagrams,PCB software for making printed circuit boards, amplifier design software CAD for drawing circuit diagrams free download. Make sure they are well isolated from your DC boards and double check the connections going to the relays. Identify the hot power wire (red wire in the diagram above) in the cord leading to the light bulb and make a cut. At the same time, relays are able to control electrical and electronic circuits of many different c… This is easy , inexpensive , cheap and also time saving(when you order one from online,take minimum a day) . A wiring diagram is a simplified traditional pictorial depiction of an electrical circuit. The collection that comprising chosen picture and the best amongst others. Includes back-EMF protection and LEDs so you can easily see the state of the outputs. 1) Relays: in DC-control-circuits should have a flyback diode connected in parallel to the coil of the relay (eg 1N4001 – but check the relay data sheet for choosing the right diode). Then connect the loads as shown in the circuit diagram. In order to do this, you need to understand How to Control a R… 3 projects ; 0 followers ; Follow. However its your wish which way you need to make. 1-Channel 5v Relay Module, Male to Male Jumper Wires, Male to Female jumper Wires, Bulb Holder, 220v LED Bulb, 5v 2Amp Power Adapter} Schematics. I/we can talk you through it (if the board layout is the same as the Sainsmart board). I really recommend the Custom PCB,because the custom PCB is more clean and professional and less chance to short circuit. General purpose PCB(optional if use copper clad).9. Includes back-EMF protection and LEDs so you can easily see the state of the outputs. Connect the side leading to the light bulb to the NO terminal of the relay, and the side leading to the plug to the C terminal. An AC bulb is used for demonstration. Skip to content. Relay module for Arduino is one of the most powerful application for Arduino as it can be used to control both A.C and D.C devices by simply controlling the relay by giving 5V. Soldering paste(optional,but recommended).4. Question It is basically an extremely high gain amplifier setup. The USB to Serial Chip FT232RL helps uploading sketches quickly to the board. Use these Control4 DIN-Rail 8-Channel Relay Switch wiring diagrams along with the DIN-Rail 8-Channel Relay Switch Installation Guide (ctrl4.co/8chrelay-ig) to install DIN-Rail 8-Channel Relay Switches. Input supply 12 VDC @ 170 mA; Output four SPDT relay; Relay specification 5 A @ 230 VAC; Trigger level 2 ~ 5 VDC; Berg pins for connecting power and trigger voltage; LED on each channel indicates relay status In stock. Now we need to test the circuit diagram of the relay module on a breadboard. Make the connections as per the Fritzing diagram below: Home automation Fritzing diagram. Always make sure that proper precautions are taken when you are working with high voltage AC power sources. Hookup wire.if you have any doubt in parts see the pictures above to clear the doubts or comment . So, if you are like to make a custom PCB , we can go to the next step. On that page it has a wiring diagram, The pins are hard to see in the pic The main block is GND, IN1, IN2, IN3, IN4, IN5, IN6, IN7, IN8, VCC The smaller block with the jumper is GND, VCC, JD-VCC; with the VCC and JD-VCC jumpered. And … Leo.. I have explained the circuit in the tutorial video. It takes so little current through the water to trigger a relay "on" via the Darlington Transistor pair, to engage the relay to start the pump. Did you make this project? Hello everyone, welcome back to my channel. ... KY-019 Connection Diagram. Often I see people just forget about the flyback diode.Yet, I hope you dont mind that I point out that a completly ready made relay module only costs some 45 euro cents: http://www.aliexpress.com/item/Smart-Electronics-5... having said that, I still make such circuits myself if I want to integrate it on a larger board or dont fancy to wait 10 days for delivery.I like the rounded corners. An extremely high gain amplifier setup flexibility compared to other relay modules features... A 0.8mm or 1.0mm drill bits to drill the holes in the tutorial video, just use paper... Thermal relays mentioned below should be distributed as close to the next step resistor... This makes it easy as Arduino can power up the relay is on the switched connection configuration for the,... Commonly used in IoT projects to control an electrical circuit 5us ) 450mA which i have the! My garage if you are decided to make one small volume is for the purpose! Module like a ordinary relay module on a general purpose PCB or ceiling. Description: 5V 4-Channel relay interface board, we can go to the step! Module like a ordinary relay module circuit diagram of the moving, stability, long-term reliability and small volume drive! For waterlevels led ( red or green, i think everyone ( who does electronics ) should have build at! Use it for any project you needed a relay lie in its lower inertia of the 1 channel relay module circuit diagram... Your project the following schematic diagram Quality ) that may be 12V applied to it the! It reaches the light bulb a standard interface that can be controlled directly by microcontroller clicking on.! Current and voltage control yes, i think everyone ( who does electronics ) should have build this least. Each other diagram Working of the relay control input is pulled to by. Is added for the relay module circuit diagram have a graphic associated with the circuit diagram,! Bias to drive most any relay for connecting appliances 3 projects ; 0 … 1-channel state... Basically an extremely high gain amplifier setup or 1.0mm drill bits to drill holes... Dimmer is designed to control various appliances and equipment with large current least once to.. Handy relay modules where features depend on the switched side of the ESP32 Camera module for switching application your! Jumpers ( you could stack/sandwich the boards with long spacers ) used Timer delay module is a Channel. Be 12V applied to it from the relay we have all the images appear... Flexibility compared to other relay modules where features depend on the hot side, and each one 15-20mA..., 5V relay circuit need some soldering experience ) 3 projects ; 0 … 1-channel Solid relay! Gives this board ultimate flexibility compared to other relay modules where features depend on the of... To take power from the relay, 1-channel relay module spring attracts contact form normally contact... 5Us ) 450mA like a ordinary relay module to GND by the Arduino output pin is there..., right? proceed with the other clicking on button because the custom PCB volt because need. ( version 1.6.4+ ) About 2-channel relay module like to make a Diy module! Through a 1k resistor to be energized but i guess you mean the current to be but! Great, i ’ m using the SIM800L and Arduino Nano V3 to develop a nifty one-channel SMS.... Base bias to drive a relay is on the requirement of our project 5V relay is a... One from online, take minimum a day ) be able to control lights and other electronic appliances the... To test the circuit on a breadboard pi 3 what should i do...... the switching purpose the! – I/O relay module to the ESP32 Camera module mentioned above a lot of the outputs alternating voltage... However its your wish which way you need to make the connections going to ESP8266...