Does your waist or back hurt when you bend down? So this invention, it's for you and it can help you!!! Today we will see how to build a clamp to lift objects, which are on the floor or perhaps at a certain height. Just by pressing a couple of buttons, in the command circuit, you can operate a 360-degree MG995 servo motor, which will open or close a clamp that will allow you to raise different objects without any difficulty. In the event that it is rubbish or some dirty object, it will not allow us to put our hands in contact thus avoiding contamination. The brain of the circuit will be an Arduino nano, and the printed circuit is included completely free of charge.

materials

An Arduino nano

The Arduino Nano is a small board, complete and compatible with the test board based on the ATmega328 (Arduino Nano 3.x). It has about the same functionality as the Arduino Duemilanove, but in a different package. It only lacks a DC power connector and works with a Mini-B USB cable instead of a standard one.

microcontrollerATmega328architectureAVROperating voltage5 VFlash memory32 KB of which 2 KB uses the bootloaderSram2 KBClock speed16 MHzAnalog pins IN8Eeprom1 KBDC current by I/O pins40 mA (I/O pins)Input voltage7-12 VDigital I/O Pins22 (6 of which are PWM)PWM output6Energy consumption19 mAPCB size18 x 45 mmweight7g

Pin diagram

A socket for the Arduino nano

Male pins

A 1Kohm resistor

A LED diode

A pcb

Download gerber file –> Pinza_levanta_objetos

A 360-degree MG995 servo motor (with accessories)

The mg995 – 360o, is a continuous rotation servo (360o) is a variant of the normal servos, in which the signal we send to the servo controls the rotationspeed, rather than the angular position as happens in conventional servos.

This continuous rotation servo is an easy way to get a motor with speed control, without having to add additional devices such as controllers or encoders as in the case of DC motors or step by step, since the control is integrated into the servo itself.

specs

• Gear material: Metal
• Turning Range: 360
• Operating voltage: 3 V to 7.2 V
• Unloaded operating speed : 0.17 seconds / 60 degrees (4.8V); 0.13 seconds / 60 degrees (6.0V)
• Torque: 15 kg / cm
• Working temperature: -30oC to 60oC
• Cable length: 310 mm
• Weight: 55g
• Dimensions: 40.7 mm x 19.7 mm x 42.9 mm

Includes:

• 1 Servomotor Tower Pro Mg995 continuous rotation.
• 3 Screws for assembly.
• 3 Coples (horns). 

Female pins

3-wire telephone cable

Aluminium profile 12 x 12 (to build the clamp)

Screws and nuts

Electronic diagram

source code

//Código para servo MG995 de 360 grados
#include <Servo.h>//Librería para el control del servo
//Variables
int BT1 = 2;
int BT2 = 3;
int BT1_ESTADO;
int BT2_ESTADO;
Servo myservo;  // Creanos un objeto servo para el control del servo
void setup() {
  pinMode(BT1, INPUT_PULLUP);// Botón en el pin 2
  pinMode(BT2, INPUT_PULLUP);// Botón en el pin 3
  myservo.attach(4);  // Usaremos el pin número 4 para el control del servo
}
void loop() {
  //Leemos el estado de los puldasores
  BT1_ESTADO = digitalRead(BT1);
  BT2_ESTADO = digitalRead(BT2);
  //Si se precionó el pulsador del pin 2 se cumple esta condición
  if(BT1_ESTADO == LOW){
   myservo.write(180);//Cerramos la pinza 
    delay(100);
    }
  //Si se precionó el pulsador del pin 3 se cumple esta condición  
   if(BT2_ESTADO == LOW){
   myservo.write(0); //Abrimos la pinza
    delay(400);
    myservo.write(90);//Detenemos la marcha del servo
    } 
}

More proyects in https://www.youtube.com/user/carlosvolt?sub_confirmation=1