MPX10DP Differential Pressure Sensor The MPX10DP Differential Pressure Sensor consists of a pressure-sensitive element to determine the actual pressure applied to the sensor and some components to convert this information into an output signal. The MPX10DP Pressure Sensor is a dual-port uncompensated Silicon Pressure Sensor for environmental control systems and level indicators. The MPX10 series silicon piezoresistive pressure sensor provides a very accurate and linear voltage output, directly proportional to the applied pressure. This standard uncompensated sensor permits manufacturers to design and add their own external temperature compensation and signal conditioning networks. This sensor has on-chip temperature compensation and is laser-calibrated. As the output voltage is linear with the pressure the signal is particularly easy to interpret. check out : Differential Pressure Transmitter for Variable Air Volume(VAV) Connection Diagram with Arduino:

BMP180 Pressure Sensor Module BMP180 Digital Barometric Pressure Sensor Module compatible with Arduino will Measure the absolute pressure of the environment using a digital barometer such as this has some interesting applications. By converting the pressure measured into altitude, you have a reliable pressure sensor for determining the height of your robot, plane or projectile! Using a sensor as capable as the BMP180 you can achieve an accuracy of 1m, with the noise of only 17cm in ultra-high resolution noise. The device will operate at the only 0.3uA meaning low current draw for battery-powered applications. The BMP180 comes fully calibrated and ready to use. As the device operates over I2C we’ve added optional I2C pull-ups that can be enabled using the PU (pull up) jumper on the board for your convenience and ease during breadboarding. Using I2C, the device provides pressure and temperature as 16bit values, which are used along with calibration data within the device are used to provide a temperature compensated altitude calculation. check out : BMP180 Pressure Sensor Module (Pack of 25) Package Includes: 1 x BMP180 Pressure Sensor Module Specifications Input Supply Voltage 1.8 ~ 3.6V (DC) Power Consumption 0.5uA at 1Hz Interface Type I2C Dimensions  2 x 1 x 1cms  Weight 5 grams

TTP229 16 Channel Capacitive Touch Module This is TTP229 16-Way Capacitive Touch Switch Digital Touch Sensor Keypad Module. This capacitive touch sensor module uses the TTP229 integrated circuit, making it easy to add capacitive touch input to your project. It features 16 sensitive touchpads that make an ideal replacement for the old-fashioned keypads. Capacitive touch allows electronics to sense when your finger is within a few millimeters of a surface to simulate a button “press” just like how the pushbutton works. Capacitive sensing may be used in any place where low to no force human touch sensing is desirable. Package Includes: 1 x TTP229 16 Channel Capacitive Touch Module Specifications: Working voltage 2.4V-5.5V  Onboard power indicator Yes Operating current @VDD=3V no load Dimensions 49.3 (mm) x64.5 (mm) Weight  5 grams

KY-036 Metal Touch Sensor The KY-036 Touch Sensor Module utilizes a floating lead on a Darlington transistor to detect a touch. There are 2 LEDs on-board. A red LED lights when power is applied. A green or red LED lights when a touch is detected. It's a simple module that can be easily integrated into a circuit, it can be connected to an MCU (microcontroller unit) using just three pins: VCC, GND and Signal. The signal pin goes high when the sensor is touched and goes low when the touch is removed. It can be used in a variety of applications where touch sensing is required such as buttons, touchscreens, and other human-machine interfaces. Package Includes: 1 x KY-036 Metal Touch Sensor Module Specifications Main Chip  LM393 Working voltage(V) 5V PCB Color Red Pin Connector to board 4 Pins  Dimensions  4.3 x 1.6 x 1.5cms  Weight  5 grams

TTP223 Touch Switch Module The TTP223 Touch Key Module is based on a touch-sensing IC (TTP223) capacitive touch switch module. A capacitive touch sensor module based on the dedicated TTP223 touch sensor IC. The module provides a single integrated touch sensing area of 11 x 10.5mm with a sensor range of ~5mm. An onboard LED will give a visual indication of when the sensor is triggered. When triggered the output of the module will switch from its idle low state to high (default operation). Solder jumpers allow for reconfiguring their mode of operation to be either active low or toggle output. TTP223 Capacitive Touch Sensor Module is easy to use. The TTP223 is a touchpad detector IC replicating a single tactile button. The TTP223 is a touchpad detector IC replicating a single tactile button. This touch-detection IC is designed for replacing traditional direct button key with diverse pad size. check out : TTP223 Touch Switch Module ( Pack of 25) Trigger-setting mode: (1- > Short ; 0- > No Short): AB=00: No-lock High TTL level output; AB=01: Self-lock High TTL level output; AB=10: No-lock Low TTL level output; AB=11: Self-lock Low TTL level output; Key

TTP224 - 4 Channel Capacitive Touch Sensor Module 4 Channel Capacitive Touch Sensor Module uses the touch-sensing IC TTP224 to sense the touch input thus making it easy to add capacitive touch input to your project. The touching detection IC is designed for replacing traditional direct button key with diverse pad size. The module has 4 touch pads. Power the module with 2.4 ~ 5.5V DC and the touch pad is all active to sense the input. Four Channel Capacitive Touch Sensor Module is easy to interface. It can be used along with a microcontroller or an Arduino or even without one. When a capacitive load (such as a human hand) is in close proximity to the sense-pad, the sensor detects the change in capacitance and activates the switch. Custom sense-pads can be made from nearly any conductive material and these sensors can detect touch through thin layers of non-conductive materials such as glass, plastic, fabric or even wood. Thus, the 4 Channel Capacitive Touch Sensor Module can be hidden in wall or other places, a perfect alternative to get rid of the conventional push-button troubles. A total of 4 pads are available on this module. The sense-pads can also be extended with a wire or almost any conductive material. Package Includes: 1 x TTP224 - 4 Channel Capacitive Touch Sensor Module Specifications: Model No. TTP224  Keypads 4 Weight 3.00g Dimensions 6.00cm x 8.00cm x 2.00cm

TTP226 8-Channel Capacitive Touch Pad Sensor The TTP226 8-Channel Capacitive Touch Pad Sensor is capacitive sensing design specifically for touch pad controls. The device built in regulator for touch sensor. Stable sensing method can cover diversity conditions. Human interfaces control panel links through non-conductive dielectric material. The main application is focused at replacing of the mechanical switch or button. The ASSP can independently handle the 8 touch pads with 8 direct output pins. Package Include: 1 x TTP226 8-way Capacitive Touch Switch Module. Specifications Operating Voltage 2.4 ~ 5.5 V (DC) Output Sink Current 8mA Response Time (Low Power Mode) 220ms Dimensions  4.6 x 4.7 x 1.1 cms  Weight  25 grams

TTP223B Capacitive Touch Sensor Module The TTP223B Digital Capacitive Touch Switch Sensor Module is based on a touch-sensing IC (TTP223B) capacitive touch switch module. Allows you to remove the worry of conventional push-type keys. Digital Capacitive Touch Switch Sensor Module is based on TTP223B. Normally, it outputs low and keeps at a low power state. When a touch is sensed on the circular marked region, it outputs high and switches to the quick response state. When not being touched for 12 seconds, it switches to a low-power state again. If the module is mounted on surfaces of non-metallic materials such as plastic, glass, or acrylic, you can make the keys hidden in the walls and desks. In addition to the thin paper ( non-metallic ) covering the surface of the module, as long as the correct location of the touch, you can make it hidden in the walls, desktops and other parts of buttons. Touch Sensor Interface: Control Interface: A total of three pins (GND, VCC, SIG), GND to the ground, VCC is the power supply, SIG digital signal output pin Power Indicator: Green LED, power on the right that is shiny Touch area: Similar to a fingerprint icon inside the area, you can touch the trigger finger. Positioning holes: 4 M2 screws positioning hole diameter is 2.2mm, the positioning of the module is easy to install, to achieve inter-module combination. Applications: Portable devices such as smartphones and tablets (iPhones, iPad, etc.) Home applications such as touch lamps Automotives Industrial Package Includes: 1 x TTP223B Capacitive Touch Sensor Module Specifications: Power supply  2 ~ 5.5V DC Output Pin Sink Current (@ VCC = 3V, VOL = 0.6V) 8 mA Output pin pull-up current (@ VCC = 3V, VOH = 2.4V) 4 mA Dimensions  3 x 2 x 1 cms  Weight  5 grams

MPR121 - 12 Channel Capacitive Touch Sensor Controller Module - I2C Interface The MPR121 12-Channel Capacitive Touch Sensor Controller Module is a capacitive touch sensor controller driven by an I2C interface. The chip can control up to twelve individual electrodes, as well as a simulated thirteenth electrode. This is a breakout board for NXP/ Freescale’s MPR121QR2. The MPR121 also features eight LED driving pins. When these pins are not configured as electrodes, they may be used to drive LEDs. There a four jumpers on the bottom of the board, all of which are set (closed) by default. An address jumper ties the ADD pin to ground, meaning the default I2C address of the chip will be 0x5A. If you need to change the address of the chip (by shorting ADD to a different pin), make sure you open the jumper first. Jumpers also connect SDA, SCL and the interrupt pin to 10k pull-up resistors. If you don’t require the pull-up resistors you can open the jumpers by cutting the trace connecting them. There is no regulation on the board, so the voltage supplied should be between 2.5 and 3.6VDC. The VREG pin is connected through a 0.1uF capacitor to ground, which means, unless you modify the board, you can’t operate the MPR121 in low-supply voltage mode (1.71-2.75VDC). Pin Diagram of MPR121-12 Channel Touch Sensor Module: Package Includes: 1 x MPR121 - 12 Channel Capacitive Touch Sensor Controller Module 2 x Pin Set Specifications: Operating voltage 2.5v - 3.6v Number of Electrodes 12 electrodes Dimensions  5 x 4 x 2 cms  Weight  5 grams

TTP223 Touch Switch Module The TTP223 Touch Key Module is based on a touch-sensing IC (TTP223) capacitive touch switch module. A capacitive touch sensor module based on the dedicated TTP223 touch sensor IC. The module provides a single integrated touch sensing area of 11 x 10.5mm with a sensor range of ~5mm. An onboard LED will give a visual indication of when the sensor is triggered. When triggered the output of the module will switch from its idle low state to high (default operation). Solder jumpers allow for reconfiguring their mode of operation to be either active low or toggle output. TTP223 Capacitive Touch Sensor Module is easy to use. The TTP223 is a touchpad detector IC replicating a single tactile button. The TTP223 is a touchpad detector IC replicating a single tactile button. This touch-detection IC is designed for replacing traditional direct button key with diverse pad size. Trigger-setting mode: (1- > Short ; 0- > No Short): AB=00: No-lock High TTL level output; AB=01: Self-lock High TTL level output; AB=10: No-lock Low TTL level output; AB=11: Self-lock Low TTL level output; Key