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What is the HC-SR04? The HC-SR04 is a ultrasonic distance ... to send out a ping and measure how long the sound takes to come back, exac ...tly like bats use to fly in the dark. The sensor works between 2-400cm however if the ping sound is reflected away f...

Please notice that this is part of a series of tutori ... and complex projects. Aims This tutorial aims to help you setting up a AR Unity project using ... the Vuforia plug-in. Prerequisite ...s Developing environment setup. In order to continue with...

What is a DFPlayer? The DFPlayer Mini MP3 Player For A ...ll and low-priced MP3 module with a simplified output directly to ... the speaker. The module can be used as a stand- ...alone module with an attached battery, speaker and push buttons or used in combination ...

...s imaged, it is ready to go! We have a more detailed tutorial for ... imaging the Pi. Now we can move on to conf ...iguration when you turn on your Pi for the first time. 1. Power up the Raspberry Pi When you plug in the power supply and all other equ...

How to construct a robotic arm? A ...robotic arm is basically like a human arm which consists of the upper arm, lower arm and hand (gripper). There are a lot of online resource ...s for laser-cut files that you can use. After you have found one or designed one, y...

What is the OLED monochrome display? The OLED monochrome display is a small (tiny) a ...nd high-readability display. It is usef ...A), 3(SCL), ... #define OLED_RESET 4 // Reset pin # (or -1 if sharing Arduino ... reset pin) #define SCREEN_ADDRESS 0x3...

...To start, let's create a new Python file called "variables." This can be done by going to the project tool window on the left-hand side and right-clicking on your "first-pycharm-project" folder. From here you can thenhen select New > Python file. Jus...

How to image a Raspberry Pi? There is an official video showing how if you prefer. 1. Download the Raspberry Pi Imager Go to the Raspbeery Pi official site to ...download the software. Choose a suitable version for your ...sert your SD card A CTL Pi kit should contain an SD card. Insert ...

What is an Electromagnet? The Grove Electromagnet is a type ...of magnetic actuator that becomes magnetized when an electric current passes through it. When powered on, it can attract sm ...all ferromagnetic objects such as nails, screws, or paper clip...

What is a Rotary Encoder Button? A ...oder button is an input device that combines: a Rotary encoder — ...erclockwise) and steps and a Push button — to detect when the knob is pressed down. This component is smaller in size ...and significantly cheaper than a regular rotary enco...

What is an IR Breakbeam Sensor? An ...IR) emitter and an IR receiver—that form an invisible beam. When something passes through and blocks the beam, the sensor detects the interruption and triggers an o ... Sensor PIR Sensor Which is Advantage ...

What is a rotary encoder? A rotary ... encoder is an electromechanical device that converts the angular position or motion of ...a rotating shaft into electrical signals. These signals can be processed to ... models of rotary encoders will have different colour codes. I am...

Face Tracking in Spark AR Watch this video which explains the basic features of the Face Tracker in Spark AR. ... There are multiple different start ...er templates in Spark AR that make use of face tracking. To ... make your development easier, choose a template that is most sim...

World Effects in Spark AR Watch this video which explains the basics of World Effects in Spa ...rk AR. There are multiple different start ...er templates in Spark AR that make use of world effects. To ... make your development easier, choose a template that is most sim...

...-in example, Blink, and upload the code. 2. Blinking Orange LED ...The orange LED labelled as L should be blinking now. 3. Unders ...tanding the Code First, you will see a lo ...t of light grey coloured text, those are comments, not code. You ...

What is Neopixel? Neopixel is a na ...is an addressable LED, meaning that it can be programmed individu ...ally. With the library created by Adafruit, y ...ou can easily program the Neopixel strip for your projec ...t. They come in different sizes and s...

What is Bone Conduction? Bone cond ...uction is a way of transmitting sound to the inner ear through the bones of the skull instead of through the air and eardrum. In normal hearing, sound waves travel through the air, vibrate the eardrum, and are then passed t...

What is a PIR sensor? PIR stands f ...or Passive Infra Red and therefore a PIR sensor can etect m ...ovement of objects that radiate IR light (like human bodies). It is very commonl ...y used for the security systems. The HC-SR501’s infrared imaging se...