Each person’s fingerprint is unique, just like DNA, you can use fingerprint to replace your key, or lock your computer with fingerprint. Adding fingerprint to your project makes it awesome, UART Fingerprint Reader is the new product we want to introduce you!
UART Fingerprint Reader is a fingerprinting module which integrated STM32F205 as its processor, less power consumption, stable and powerful! It is an intelligent module that provides many functions like fingerprint recording, image processing, eigenvalue extraction, fingerprint matching and searching, etc.
If you want to communicate with PC, CP2102 USB-TTL module is a good choice.
Note: Just put finger on the window sightly when register your fingerprint, don’t press the window hardly.
Note: The on-board mini USB port only used to update module’s firmware, don’t use this port to power module when module is in working mode!
The DHT11 is a basic, ultra low-cost digital temperature and humidity sensor. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air, and spits out a digital signal on the data pin (no analog input pins needed).
Each one-way infrared sensor continuously emits infrared emission tube, when no infrared rays emitted or reflected back but the strength is not large enough, the infrared receiver has been in the off state, TTL output terminal of the module is high level, the corresponding indicator LED remains off state; occurs when an object is detected within the detection range, infrared is reflected back and the intensity is large enough, infrared receiver is turned on, then the TTL output of the module is low, indicating diode is lit.
HC-SR501 is based on infrared technology, automatic control module, using Germany imported LHI778 probe design, high sensitivity, high reliability, ultra-low-voltage operating mode, widely used in various auto-sensing electrical equipment, especially for battery-powered automatic controlled products.
The sensor module light is adaptable to the environment, the working voltage of 3.3 V to 5 V.
It has a pair of infrared transmitting and receiving tube, when detecting direction meet with obstacles (reflecting surface), reflected infrared receiving by the tube.
After the comparator circuit processing, green indicator will light up, at the same time the signal output interface output a digital signal (a low level signal), can be adjust the detection distance through the potentiometer knob, effective distance range 2 ~ 80 cm, easy to assemble and use. So it can be widely used in robot obstacle avoidance, obstacle avoidance car, line count, and so on many occasions.
A simple flex sensor 4.5″ in length. As the sensor is flexed, the resistance across the sensor increases. Patented technology by Spectra Symbol – they claim these sensors were used in the originalNintendo Power Glove.
The resistance of the flex sensor changes when the metal pads are on the outside of the bend (text on inside of bend)
This is a small force sensitive resistor. It has a 0.16″ (4 mm) diameter active sensing area. This FSR from Interlink Electronics will vary its resistance depending on how much pressure is being applied to the sensing area. The harder the force, the lower the resistance. When no pressure is being applied to the FSR, its resistance will be larger than 1MΩ, with full pressure applied the resistance will be 2.5kΩ.
Two pins extend from the bottom of the sensor with 0.1″ pitch making it bread board friendly.
These sensors are simple to set up and great for sensing pressure, but they aren’t incredibly accurate. Use them to sense if it’s being squeezed, but you may not want to use it as a scale.
This is a breakout board for Honeywell’s HMC5883L, a 3-axis digital compass. Communication with the HMC5883L is simple and all done through an I2C interface, making it Arduino compatible.
This module can be connected to variety of microprocessors via I2C bus. It comes with a 5V->3.3V regulator, I2C pull-ups on the 3.3V internal power-supply and decoupling capacitors. This module also supports I2C communication at both 3.3V-5V logic level, you can interface this module directly from an Arduino, no pull-ups resistors needed, since they are already included in the module.
The MPX5700AP is a single port, absolute integrated silicon pressure sensor in 6 pin SIP package. This piezoresistive transducer is a state of the art monolithic silicon pressure sensor designed for wide range of applications. This patented, single element transducer combines advanced micromachining techniques, thin film metallization and bipolar processing to provide an accurate and high level analogue output signal that is proportional to applied pressure.
BMP180 is the best low-cost sensing solution for measuring barometric pressure and temperature. Because pressure changes with altitude you can also use it as an altimeter! The sensor is soldered onto a PCB with a 3.3V regulator, I2C level shifter and pull-up resistors on the I2C pins. The BMP180 is the next-generation of sensors from Bosch, and replaces the BMP085