Tweak Labs Inc Vidya Nagar, Hubli, Karnataka

When a light-emitting diode is switched on, electrons are able to recombine with holes within the device, releasing energy in the form of photons. This effect is called electroluminescence and the color of the light (corresponding to the energy of the photon) is determined by the energy band gap of the semiconductor. An LED is often small in area (less than 1 mm2), and integrated optical components may be used to shape its radiation pattern. LEDs present many advantages over incandescent light sources including lower energy consumption, longer lifetime, improved physical robustness, smaller size, and faster switching. However, LEDs powerful enough for room lighting are relatively expensive and require more precise current and heat management than compact lamp sources of comparable output. Refractive index Bare uncoated semiconductors such as silicon exhibit a very high refractive index relative to open air, which prevents passage of photons at sharp angles relative to the air-contacting surface of the semiconductor. Internal reflections can escape through other crystalline faces, if the incidence angle is low enough and the crystal is sufficiently transparent to not re-absorb the photon emission. But for a simple square LED with 90-degree angled surfaces on all sides, the faces all act as equal angle mirrors. In this case the light cannot escape and is lost as waste heat in the crystal.

XBee-PRO S2B module improves upon the power output and data protocol of the Pro Series2. Series 2B modules allow you to create complex mesh networks based on the XBee ZB ZigBee mesh firmware. Series 2 modules allow you to create complex mesh networks. this module has the lowest current draw of any Digi RF product. However, the infrastructure of a ZigBee network is more complex and requires more configuration to fully impliment. This module can give range of 90 meters indoor or 3200meters outdoor. This XBee wireless device can be directly connected to the serial port (at 3.3V level) of your microcontroller. By using a logic level translator it can also be interfaced to 5V logic (TTL) devices having serial interface. This module supports data rates of up to 250kbps. They are designed for high-throughput(35kbps) applications requiring low latency and predictable communication timing. Series 1 and Series 2B XBee modules have the same pin-out. However, Series 1 modules cannot communicate with Series 2B modules.

XBee modules are embedded solutions providing wireless end-point connectivity to devices. These modules use the IEEE 802.15.4 networking protocol for fast point-to-multipoint or peer-to-peer networking. They are designed for high-throughput applications requiring low latency and predictable communication timing.“ So basically XBee is Digi’s own Zigbee based protocol.

A simple manual wire stripper is a pair of opposing blades much like scissors or wire cutters. The addition of a center notch makes it easier to cut the insulation without cutting the wire.

A White white light-emitting diode (LED) is a semiconductor light source. LEDs are used as indicator lamps in many devices and are increasingly used for other lighting.

When a light-emitting diode is switched on, electrons are able to recombine with holes within the device, releasing energy in the form of photons. This effect is called electro-luminescence and the color of the light (corresponding to the energy of the photon) is determined by the energy band gap of the semiconductor. An LED is often small in area, and integrated optical components may be used to shape its radiation pattern. LED's present many advantages over incandescent light sources including lower energy consumption, longer lifetime, improved physical robustness, smaller size, and faster switching. However, LED's powerful enough for room lighting are relatively expensive and require more precise current and heat management than compact lamp sources of comparable output.

Water Sensor is simple and easy to use, and high cost performance, waterwater identification detection sensor; Exposed through a series of parallel wire line mark to measure the water dropletssize to determine water level. Easy to complete the water to the conversion of the analog signal, output of the simulation values can be read directly by Arduino board, to achieve the effect of water level alarm.

This module can store 15 pieces of voice instruction. Those 15 pieces are divided into 3 groups, with 5 in one group. First we should record the voice instructions group by group. After that, we should import one group by serial command before it could recognize the 5 voice instructions within that group. If we need to implement instructions in other groups, we should import the group first. This module is speaker independent. If your friend speaks the voice instruction instead of you, it may not identify the instruction.

The Vibration module based on the vibration sensor SW-420 and Comparator LM393 to detect if there is any vibration that beyond the threshold. The threshold can be adjusted by the on-board potentiometer. When this no vibration, this module output logic LOW the signal indicate LED light, And vice versa. Uses: For a variety of shocks triggering, theft alarm, smart car, an earthquake alarm, motorcycle alarm. This module when compared with normally open pneumatic shock sensor module, shock triggered much longer can drive relay module

deal for precision small jobs like SMT and micro-electronics. Element shaft is only 2.5mm thick with an isolated element! It can be set to high,medium or low with a continuously variable knob, and comes with a sponge tray with a sponge and a placing stand as standard. Comes standard with an aluminium coated long life tip. Very popular amongst jewellery manufacturers for trimmingsculpture of wax casting.

Display: 1999 counts DC Voltage: 200mV2V20V200V±0.5%, 600V±1.0% AC Voltage: 200V600V±1.2% DC Current: 20µA200µA2mA20mA200mA±1.5%, 10A±2.0% Resistance: 2002K20K200K±0.8%, 20MΩ ±1.0% Diode test: yes Continuity test: yes Power: battery 6F22 (9V)×1 Size: 145mm×85mm×30mm Weight: approx. 170g

BlackBox Series D10 is a small, handy and simple RFID Reader for your USB equipped terminal and laptop.This desktop reader is using USB interface for data transfer.It is usable for many different applications.

The Arduino USB Host Shield allows you to connect a USB device to your Arduino board. The Arduino USB Host Shield is based on the MAX3421E , which is a USB peripheralhost controller containing the digital logic and analog circuitry necessary to implement a full-speed USB peripheral or a full-low-speed host compliant to USB specification rev 2.0. The shield is TinkerKit compatible, which means you can quickly create projects by plugging TinkerKit modules onto the board.

› Built-in Image compassion. › Automatic white balance. › Automatic color compensated. › Dynamic image E-mail. › Manual focus. › Shutter key.

The digital multimeter, DMM, is one of the most common items of test equipment used in the electronics industry today. While there are many other items of test equipment that are available, the multimeter is able to provide excellent readings of the basic measurements of amps, volts and ohms. In addition to this the fact that these digital multimeters use digital and logic technology, means that the use of integrated circuits rather than analogue techniques, enables many new test features to be embedded in the design.

This is a simple Bot, which can be used in making a 2 wheel drive robot. You can use it for line follower, obstacle follower, obstacle avoider, bluetooth control Bot, Wifi control bot etc.

Resistance Box – 1 Arduino Uno(Made in China) – 1 USB Cable – 1 PIR - 1 Red LED – 5 Green LED – 5 White LED – 5 RGB LED – 1 IR Remote Controller – 1 Membrane Key pad– 1 9V Battery with holder – 1 9g Servo Motor – 1 DHT11 (Temperature & Humidity) – 1 Breadboard – 1 LDR (Light Dependent Resistor) – 3 LCD Panel – 1 Capacitor Box – 2 IR receiver – 1 Phototransistor – 1 LM35 Temperature sensor – 1 7 Segment LED – 1 LM 555 - 1 Buzzer – 1 Piezo Buzzer – 1 Buttons Switch – 1 Male headers – 5 HCSR04 Ultrasonic Sensor-1 Ribbon cable – 1 Jumper wires(M2M, M2F) - 10 each 5V Relay

The TTP229 is a capacitive touch sensor that can be used as an alternative to push button switches or the matrix keypad in embedded projects.

Features : 16-key board TTP229 capacitive touch sensor IC,Onboard power indicator,Working voltage: 2.4V-5.5V,The module can be set to output mode, the key output mode, the longest time and fast output / low power options Etc.

Infrared receiving module adopts 1838 infrared receiving head Light resistance, strong electromagnetic interference, built-in infrared dedicated IC, can work under 500 lux light intensity Widely used in: stereo, TV, video machine, disc machine, set-top boxes, digital photo frame, car stereo, remote control toys, satellite receivers, hard disk player, air conditioner, heater, electric fan, lighting and other home appliances

The TSOP17.. – series are miniaturised receivers for infrared remote control systems. PIN diode and preamplifier are assembled on lead frame, the epoxy package is designed as IR filter. The demodulated output signal can directly be decoded by a microprocessor. TSOP17.. is the standard IR remote control receiver series, supporting all major transmission codes

Features : Photo detector and preamplifier in one package Internal filter for PCM frequency Improved shielding against electrical field disturbance TTL and CMOS compatibility Output active low Etc.

These are standard '130 size' DC hobby motors. They come with a wider operating range than most toy motors: from 4.5 to 9VDC instead of 1.5-4.5V. This range makes them perfect for controlling with Arduino where you are more likely to have 5V or 9V available than a high current 3V setting. They'll fit in most electronics that already have 130-size motors installed and there's two breadboard-friendly. This Toy motor is cheapest in India.

Tilt sensors allow you to detect orientation or inclination. They are small, inexpensive, low-power and easy-to-use. If used properly, they will not wear out. Their simplicitiy makes them popular for toys, gadgets and appliances.

Thermistors are inexpensive, easily-obtainable temperature sensors. They are easy to use and adaptable. Circuits with thermistors can have reasonable output voltages - not the millivolt outputs thermocouples have. Because of these qualities, thermistors are widely used for simple temperature measurements. They're not used for high temperatures, but in the temperature ranges where they work they are widely used.

Thermistors are temperature sensitive resistors. All resistors vary with temperature, but thermistors are constructed of semiconductor material with a resistivity that is especially sensitive to temperature. However, unlike most other resistive devices, the resistance of a thermistor decreases with increasing temperature. That's due to the properties of the semiconductor material that the thermistor is made from. For some, that may be counterintuitive, but it is correct. They are inexpensive, rugged and reliable. They respond quickly. The Steinhart-Hart equation gives the reciprocal of absolute temperature as a function of the resistance of a thermistor.Using the Steinhardt-Hart equation, you can calculate the temperature of the thermistor from the measured resistance.The Steinhardt-Hart equation is: 1T = A + B*ln(R) + C*(ln(R))3 R in W, T in K