The SainSmart Uno for Arduino has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button. It contains everything needed to support the microcontroller.The SainSmart LCD Keypad Shield includes a 16x2 HD44780 White on Blue LCD module and a 5 push button keypad for menu selection and user interface programming. Fully assembled. On-line Arduino tutorial and example code. Compatible with Arduino Uno, Mega, Duemilanove. Uses digital pins 4 - 10, and analog pin 0.The SainSmart Prototyping Prototype Shield: *Access to a BlueSMiRF socket for wireless communication between Arduinos *2 general LEDs;1 general pushbutton switch;1 reset switch brought to top level *5V, GND, and Raw pins are exposed as well *Breadboard Jump Wires: Self-adhesive backing to stick on the Protoytpe Shield *170 tie points. The Ultrasonic Module HC-SR04 Distance Sensor are 4 pins out of the module: VCC, Trig, Echo, GND. So it's a very easy interface for controller to use it ranging. The all process is : pull the Trig pin to high level for more than 10us impulse, the module start ranging; finish ranging, If you find an object in front, Echo pin will be high level, and based on the different distance,it will take the different duration of high level. So we can calculated the distance easily:Distance = ((Duration of high level)*(Sonic :340m/s))/2 WHAT'S IN THE PACKAGE 1 SainSmart Uno Board 1 SainSmart LCD Keypad Shield 1 Ultrasonic Module HC-SR04 Distance Sensor 1 SainSmart Prototype Shield 1 Mini Breadboard 65*Jumper Cable Download Link
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