Ninja Blocks Kit | Ninja Blocks. Temperature & Humidity Use the included Temperature & Humidity sensor to monitor your wine collection from anywhere in the world or use the Ninja Rules Engine to build the world's best thermostat. Motion Sensor Get peace of mind by using the included wireless motion sensor to build a security system that talks to the web or simply use it to let you know when the kids are at home. Door Bell Never miss a delivery again! Window & Door Sensor The wireless Window & Door sensor takes your security system to the next level. Arduino Compatible If you want to get your coding hands dirty, the Ninja Block contains an Arduino compatible micro-controller, that you can program using the official Arduino IDE. BeagleBone Inside each Ninja Block is a credit card sized Open Source Computer called a BeagleBone running Ubuntu (Linux).
RGB LED Eyes You can control your Ninja Block's RGB LED eyes. Open Hardware The Hack Me tags give you instant access to the Open Source Computer and Arduino inside. How to Analyze Resistive Circuits Using Ohm's Law (with pictures) Ohm's law may be written [1] in 3 equivalent forms depending on what is being solved for: "V" is the voltage across the resistance (the "potential difference"), "I" is the current through the resistance, and "R" is the value of the resistance. If the resistance is a resistor (a component having a calibrated value of resistance) it is usually labelled with "R" followed by a number, such as "R1", "R105", etc. Form (1) is easily converted into forms (2) or (3) by algebraic manipulation.
In some cases the letter "E" is used in place of "V" (for example, E = IR), where "E" stands for EMF or "electromotive force" which is another name for voltage. Form (1) is used when the current is known through a resistor of known value. Form (2) is used when the voltage is known across a resistor of known value. Form (3) is used when the resistor value is unknown, but the voltage across it and current through it are known, allowing the resistance to be computed. Example: Voltage Drop Across a Wire. Light Emitting Diodes (LEDs) Colour | Sizes and shapes | Resistor value | LEDs in series | LED data | Flashing | Displays Also see: Lamps Example LED: Circuit symbol: Function LEDs emit light when an electric current passes through them. Connecting and soldering LEDs must be connected the correct way round, the diagram may be labelled a or + for anode and k or - for cathode (yes, it really is k, not c, for cathode!).
LEDs can be damaged by heat when soldering, but the risk is small unless you are very slow. Testing an LED Never connect an LED directly to a battery or power supply! LEDs must have a resistor in series to limit the current to a safe value, for quick testing purposes a 1k resistor is suitable for most LEDs if your supply voltage is 12V or less. For an accurate value please see Calculating an LED resistor value below. Colours of LEDs LEDs are available in red, orange, amber, yellow, green, blue and white. Tri-colour LEDs The diagram shows the construction of a tri-colour LED. Bi-colour LEDs ). For example. Light Emitting Diodes (LEDs) Colour | Sizes and shapes | Resistor value | LEDs in series | LED data | Flashing | Displays Also see: Lamps Example LED: Circuit symbol: Function LEDs emit light when an electric current passes through them.
Connecting and soldering LEDs must be connected the correct way round, the diagram may be labelled a or + for anode and k or - for cathode (yes, it really is k, not c, for cathode!). LEDs can be damaged by heat when soldering, but the risk is small unless you are very slow. Testing an LED Never connect an LED directly to a battery or power supply! LEDs must have a resistor in series to limit the current to a safe value, for quick testing purposes a 1k resistor is suitable for most LEDs if your supply voltage is 12V or less.
For an accurate value please see Calculating an LED resistor value below. Colours of LEDs LEDs are available in red, orange, amber, yellow, green, blue and white. Tri-colour LEDs The diagram shows the construction of a tri-colour LED. Bi-colour LEDs ). For example. How To Fix Replace Repair iPhone 4 Broken Glass DIY.
Arduino Electronics projects. Makerbot. Ultraviolet. Portable ultraviolet lamp Ultraviolet (UV) light is electromagnetic radiation with a wavelength shorter than that of visible light, but longer than X-rays, that is, in the range between 400 nm and 100 nm, corresponding to photon energies from 3 eV to 124 eV. It is so-named because the spectrum consists of electromagnetic waves with frequencies higher than those that humans identify as the color violet.
These frequencies are invisible to most humans except those with aphakia. Near-UV is visible to a number of insects and birds. UV light is found in sunlight and is emitted by electric arcs and specialized lights such as mercury lamps and black lights. It can cause chemical reactions, and causes many substances to glow or fluoresce. A large fraction of UV, including all that reaches the surface of the Earth, is classified as non-ionizing radiation. Discovery Origin of the term Subtypes The electromagnetic spectrum of ultraviolet light can be subdivided in a number of ways. Sources. Light-emitting diode. Semiconductor and solid state light source Parts of a conventional LED. The flat bottom surfaces of the anvil and post embedded inside the epoxy act as anchors, to prevent the conductors from being forcefully pulled out via mechanical strain or vibration. Close-up of an led with the voltage being increased and decreased to show a detailed view of its operation.
A light-emitting diode (LED) is a semiconductor device that emits light when current flows through it. LEDs have many advantages over incandescent light sources, including lower power consumption, longer lifetime, improved physical robustness, smaller size, and faster switching. As a transducer of electricity into light, LEDs operate in reverse of photodiodes. History[edit] Discoveries and early devices[edit] Green electroluminescence from a point contact on a crystal of SiC recreates Round's original experiment from 1907. Electroluminescence as a phenomenon was discovered in 1907 by the English experimenter H. Blue LED[edit] DigitalReadSerial. Learning Examples | Foundations | Hacking | Links Examples > Basics Digital Read Serial This example shows you how to monitor the state of a switch by establishing serial communication between your Arduino and your computer over USB.
Hardware Required Arduino Board A momentary switch, button, or toggle switch 10k ohm resistor breadboard hook-up wire Circuit image developed using Fritzing. Connect three wires to the Arduino board. Pushbuttons or switches connect two points in a circuit when you press them. If you disconnect the digital i/o pin from everything, the LED may blink erratically. Schematic Code In the program below, the very first thing that you do will in the setup function is to begin serial communications, at 9600 bits of data per second, between your Arduino and your computer with the line: Serial.begin(9600); Next, initialize digital pin 2, the pin that will read the output from your button, as an input: pinMode(2,INPUT); int sensorValue = digitalRead(2); Serial.println(sensorValue); TSL1401 Linescan Imaging Sensor Daughterboard.
3.2" LCD Touch Screen Display Kit. PIR Sensor (Rev B) Item code: 555-28027 What It Can Do Detects motion of humans or animals from as far away as 30 feetSilent operation for alarms, motion activated nightlights, holiday propsAutomatically resets after period of inactivity Passive infrared (PIR) sensors detect motion by comparing the amount of infrared radiation that reaches a pair of detectors. When the two detectors “see” different values, the sensor indicates it as movement of an object, such as a person or an animal. PIR sensors are often used in driveway security systems, which turn on a light (but only at night) when someone approaches the house. The Parallax PIR Motion Sensor has a simple on/off output: when on, the sensor is detecting movement.
A selectable jumper on the sensor lets you set working distance: L (for Long) position, the effective sensor distance is up to 30 feet. For proper operation the sensor should be allowed to warm up for 20 to 60 seconds after first applying power. Parts List Basic Wiring Program KickStarts Arduino Uno.