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Tag Archives: servos

  • Weekly Recap - Watering HacksJune 26, 2015

    So summer is here and we all have a lot of things to do but not the time. Here are some hacks that will surely help you to take some time off your daily tasks, this projects will automatically take care of your plants for you.

    e-Waste Watering Can

    This hack started as a project to teach a group of students about electronic waste and reusing technology. First thing they did was taking the CD drive out of a desktop computer. The idea was to control the amount of water by opening or closing the CD drive. They also recycled a plastic bottle to store the water and used a tube to irrigate the plant and a 12-16V power supply.

    WaterCan

    After that, they soldered the leads of the drive to a relay, and connected it to an Arduino Uno to be able to control it. They included a sensor to measure soil moisture with the Arduino board and, depending on this value, they used the CD drive to clamp the water of the bottle.

    As you can see the components for this project are cheap and mostly reused and recycled, so it's easy to make one yourself!

    Check our solutions for taking care of your plants here.

    Read about this project on Instructables. Via Adafruit.

    Automated Plant Watering System

    Shane built another system to water your plants. He used a car door actuator with a small DC motor to activate a water bottle pump. This up and down movement of the electronic actuator, which transforms a rotary motion into a linear motion, rises the pressure in the jug.

    When the pressure is high enough, a servo, mounted on the same wooden structure, activates a lever that sprays the water through a hose. Watch it in the video below.

    The servo activating the lever is connected to a dsPIC microcontroller, which also controls the door lock actuator with a DC motor driver. Just a few components and reused equipment!

    Take a look at Open Garden Indoor, our alternative to remotely control your indoor plants.

    Find all about this hack here. Via Hackaday.

    Watering Garden with Arduino

    OK, now we're getting serious. This project is a complete watering system for your garden. It is build around an Arduino Uno and a soil moisture detector. It is planned to use up to 8 electrovalves, but as he explains you can adapt it to your needs and use as many as you like.

    The watering system is composed of flexible water pipe, connectors, splitters, electrovalves and a sprinkler. He is using an 8 relay shield (9V or 12V) to control the electrovalves and an AC adapter to power everything but the Arduino Board, which is connected to a USB power adapter.

    WateringGarden

    The Arduino monitors the soil moisture with the sensor, and depending on this value it activates the relays and waters the garden. It is a simple way to automatically take care of your plants.

    Check our kit for garden watering: Open Garden Outdoor.

    Posted on Instructables.

  • Arduino Resistor Cutting Robot - CH Team HacksMarch 31, 2015

    Today we bring you a project built by Pablo (surely you remember Pablo, don't you?), who works in the production department of Libelium. They go through a lot of resistor tapes every day in this department and they have to cut them manually with scissors so they can handle them more comfortably. This certainly takes a little bit of time and effort and he thought there had to be a way of making this easier and faster.

    And what better way than Arduino?

    Searching for a solution he came up with a resistor cutting robot controlled, obviously, by Arduino. He built his own robot based on the prototype made at Oomlout. This was an open source project, so, if you want to give it a go yourself, you can download the design files for the housing here.

    Arduino Resistor Cutting Robot

    He used a cnc machine to cut the wood fiberboard to assemble the housing for the robot and to make every part in the machine.

    To load the resistors there is a groove that is approximately as wide as the resistors tape, so it keeps the tape centered at every moment.

    A stepper motor controls a set of rollers and gears to move the resistor tape forward and then it stops after a preset number of steps. You can choose how many pieces you want in your tape by setting up the specific number of steps that the motor has to turn.

    After the set group of resistors have moved past the blades the stepper motor stops, and two servos control a pair of box-cutter blades to slice both sides of the tape. Servos can be precisely controlled and positioned so they're perfect for this purpose: the blades move down and, in the end, outwards to slice both sides of the tape, providing this way a more maneuverable strip.

    Check the video!

    You can see the Arduino Resistor Cutting Robot in action in this video.

    OK, I like it. Where is the code?

    The robot is controlled by an Arduino Uno Board and an A4988 driver is needed for the stepper motor.

    We are happy to share the code with all of you, our fellow readers.

    /*
     *  RESISTOR CUTTING ROBOT
     */
    
    
    #include 
    MegaServo Servos[MAX_SERVOS] ;
    
    #define SPEED 12000			// Speed for the stepper motor delay
    #define SERVO_PIN            5		// Pins for the servos		
    #define SERVO2_PIN           6
    
    int steps = 13;				// Pins for the stepper motor
    int gyre = 9;
    int units = 220;			// Number of steps for 10 resistors
    
    ...
    

    Download the complete code here.

    You can check more CH Team Hacks, for example this realtime GPS+GPRS tracking of vehicles using Arduino.

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