Category Archives: Tutorials

WHAT DOES PCB STANDS FOR? PCB stands for “Printed Circuit Board”. A PCB is made up of a laminated material or some fiberglass. For both laptops and desktops, PCBs are used. The conductive path is printed on the board where we can connect different components on the PCB like resistance, transistors, etc. PCBs are mostly used in many devices like radios, cell phones, digital cameras, and many other electronic devices. SMD COMPONENTS:- SMDs are Surface Mount Devices that are especially made for mounting SMT PCBs i.e., for Surface Mount Technologies. SMD components come in various sizes as well as these components needs less space . The bigger sizes like 0805 and 0603 can be soldered easily using a thin tip soldering iron. Here we provide another video which describe how can we Solder SMD Devices on a PCB and also the SMD Soldering Techniques https://youtu.be/OpCdURINP6Q . SMDs works on PCB…

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We are living in the world of innovation. As we all know that Internet-connected human beings with each other. Now it’s time to do things or devices with the Internet. Some of us are already familiar with the term IoT (Internet Of Things). Through the following project, we will be implementing the IoT into reality.

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A few decades ago no one would have thought about automatic lights as a reality. But nowadays it is possible with the help of some budget-friendly electronic components. You just go into the room and see the magic happen, your LED bulb will glow automatically. The project we are going to discuss in this article does the same, we named it “Motion sensing lights”.

Motion sensing LED

Now you might be wondering about the working of these lights, well the key component of these lights is “Passive Infrared Sensor”, abbreviated as PIR senor. Upon which Motion sensing lights work.

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Overview ESP-MESH is a networking protocol built atop the Wi-Fi protocol. ESP-MESH allows numerous devices (henceforth referred to as nodes) spread over a large physical area (both indoors and outdoors) to be interconnected under a single WLAN (Wireless Local-Area Network). ESP-MESH is self-organizing and self-healing meaning the network can be built and maintained autonomously. Traditional Wi-Fi Network Architecture A traditional infrastructure Wi-Fi network is a point-to-multipoint network where a single central node known as the access point (AP) is directly connected to all other nodes known as stations. The AP is responsible for arbitrating and forwarding transmissions between the stations. Some APs also relay transmissions to/from an external IP network via a router. Traditional infrastructure Wi-Fi networks suffer the disadvantage of limited coverage area due to the requirement that every station must be in range to directly connect with the AP. Furthermore, traditional Wi-Fi networks are susceptible to overloading as…

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Things used in this project Hardware components NodeMCU ESP8266 Breakout Board × 1 Software apps and online services Arduino IDE Hand tools and fabrication machines Soldering iron (generic) Solder Wire, Lead Free Story The Smart Board The Smart Board is based on internet of things. IoT The internet of things, or IoT, is a system of interrelated computing devices, mechanical and digital machines, objects, animals or people that are provided with unique identifiers (UIDs) and the ability to transfer data over a network without requiring human-to-human or human-to-computer interaction. The IoT Board Firstly you will have to make a IoT board. Detailed Instructions are given in this video. The Smart Board The Smart Board can be made easily by watching this video. All Instructions are given in video. How to install ESP8266 in IDE – http://www.robocircuits.com/how-to-install-esp8266-library-in-arduino/ Custom parts and enclosures Gerber Files Schematics Code Blynk C/C++ /************************************************************* Download latest Blynk library here:…

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Lets start making Our Servo Motor Tester Hi This Article is about Servo Motors and How to Make a Servo Motor Tester. Before Start Reading. Kindly take a Minute and Subscribe me on YouTube – Click here -> RoboCircuits I needed a servo tester for my workshop, to have at hand whenever I change servo horns or need to see if a servo is dead. I decided to use a 555 timer to do this. 555 IC will create PWM signals for our Servo Motor Tester. Driving a Servo Motor This is covered everywhere on the internet, so I’ll be brief. A typical RC servo is controlled by a 50Hz square pulse signal called Pulse Width Modulation (PWM). The high pulse time varies from 1ms to 2ms, where 1ms gives 0 degrees and 2ms gives 90 degrees. This is followed by a low time of 16-18ms. The servo has a…

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Story Our skin is amazing! It provides a medium for us to experience the sense of touch. It keeps infections out and keeps innards in but I bet you didn’t know that our skin changes conductivity depending on many different things one being our mood! It is called Electrodermal activity (EDA) and there’s a really interesting Wikipedia page you can read here. The basics are that our skin changes its conductivity depending on how we feel. So tody we are going to make a Lie Detector using Arduino. This lie Detector will detect if the person on whom we are testing this is telling a lie or not. We start by connect our Arduino to the subject. Then connect the Arduino to a computer with the graphing software (I’ll go over this in detail later). Lets start by asking the subject some easy questions. We know they will answer truthfully…

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Introduction I am Maqueen Hello, my name is Maqueen, is a graphical programming robot for STEM education, which inherits playability and simple operation of micro:bit. The Mini-body, interesting features and plug-and-play allow children to quickly learn graphic programming in entertaining, nurturing children’s interest in science and logical thinking. What are the features of Maqueen? Support for Makecode, will support Scratch and python later. Small size, flexible movement. All-metal miniature gear motor, good quality, strong driving force. Line patrol, ambient light, LED lights, ultrasonic interface, buzzer, I2C interface, mechanical expansion screw hole, etc. … full-featured, highly expandable. Exclusive customized POM bearing wheel, flexible and reliable, strong obstacle crossing ability. Easy to install, easy to use. Function Diagram Specification Supply Voltage: 3.5V~5V DC ( Three AAA batteries or 3.7V lithium battery ) Infrared Grayscale Sensor(High-low level) x 2 Buzzer x 1 Infrared Receiver (NEC decoder) x 1 LED Lights (High-low level control)…

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How to drive the Arduino color OLED The display is very small. It has almost the same size as the monochrome OLED display. But the resolution of it is not the same. It has a resolution of 96×64 pixels. So, it has a lower resolution at the same size. It can display 65 thousand colors! The display I bought, uses the SPI interface so we have to connect 7 pins in order to make it work. The monochrome ones that I have bought, use the I2C interface which requires only 4 pins. So, we need more wires in order to connect it with Arduino. Let’s how to achieve that. I am going to connect the color OLED display to an Arduino Uno. GND pin goes to Arduino GND. Vcc pin goes to either 3.3V or 5V output of the Arduino Uno. I connect it to the 3.3V output of the Arduino Uno.…

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Dot Matrix 8×8 Make a cheap and good looking LED matrix Things used in this project Hardware components Arduino Nano R3 × 1 LED (generic) × 1 OSH Park Custom fabricated PCB × 1 Software apps and online services Arduino IDE Hand tools and fabrication machines Soldering iron (generic) Story Theory of LED dot matrix display In a dot matrix display, multiple LEDs are wired together in rows and columns. This is done to minimize the number of pins required to drive them. For example, a 8×8 matrix of LEDs (shown below) would need 64 I/O pins, one for each LED pixel. By wiring all the anodes together in rows (R1 through R8), and cathodes in columns (C1 through C8), the required number of I/O pins is reduced to 16. Each LED is addressed by its row and column number. In the figure below, if R4 is pulled high and…

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