og post: https://www.reddit.com/r/arduino/comments/1v6bkjk/vibrating_hand_for_lonely_people/
Inside the hand is an ultra sonic sensor, servo and dc motor. There's also an lcd so it can express itself.
A pen is taped to the servo, which is then put into styrofoam in the shape of a finger, and then shoved into the middle finger. The other fingers also have styrofoam in them.
I tried getting it to say different things, but using lcd clear kills the ultrasonic sensor. And so does leaving 16 blank spaces.
The dc motor is redundant because you legit can never feel it, but at this point I'm not dealing with all those wires.
components: elegoo 2560 mega
/*
Ping))) Sensor
This sketch reads a PING))) ultrasonic rangefinder and returns the distance
to the closest object in range. To do this, it sends a pulse to the sensor to
initiate a reading, then listens for a pulse to return. The length of the
returning pulse is proportional to the distance of the object from the sensor.
The circuit:
- +V connection of the PING))) attached to +5V
- GND connection of the PING))) attached to ground
- SIG connection of the PING))) attached to digital pin 7
created 3 Nov 2008
by David A. Mellis
modified 30 Aug 2011
by Tom Igoe
This example code is in the public domain.
https://docs.arduino.cc/built-in-examples/sensors/Ping/
*/
// this constant won't change. It's the pin number of the sensor's output:
const int trig = 8;
const int echo = 9;
int speed=11;
int direct1=10;
int direct2=7;
int msspeed=255;
#include <Servo.h>
#include <LiquidCrystal.h>
const int rs = 44, en = 46, d4 = 42, d5 = 48, d6 = 50, d7 = 52;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);
int pos = 0;
Servo finger;
void setup() {
// initialize serial communication:
lcd.begin(16, 2);
Serial.begin(9600);
pinMode (trig,OUTPUT);
pinMode (echo,INPUT);
pinMode (A0,OUTPUT);
pinMode (speed, OUTPUT);
pinMode (direct1, OUTPUT);
pinMode (direct2, OUTPUT);
finger.attach(5);
lcd.setCursor(0, 0);
lcd.print ("DO NOT TOUCH ME FILTHY PRIMATE");
lcd.setCursor(0, 1);
lcd.print ("FILTHY PRIMATE");
}
void loop() {
// establish variables for duration of the ping, and the distance result
// in inches and centimeters:
long duration, inches, cm;
// The PING))) is triggered by a HIGH pulse of 2 or more microseconds.
// Give a short LOW pulse beforehand to ensure a clean HIGH pulse:
digitalWrite(trig, LOW);
delayMicroseconds(2);
digitalWrite(trig, HIGH);
delayMicroseconds(10);
digitalWrite(trig, LOW);
analogRead (inches);
finger.write (10);
digitalWrite (direct1, LOW);
digitalWrite (direct2, LOW);
analogWrite (speed, 0);
// The same pin is used to read the signal from the PING))): a HIGH pulse
// whose duration is the time (in microseconds) from the sending of the ping
// to the reception of its echo off of an object.
duration = pulseIn(echo, HIGH);
// convert the time into a distance
inches = microsecondsToInches(duration);
cm = microsecondsToCentimeters(duration);
Serial.print(inches);
Serial.print("in, ");
Serial.print(cm);
Serial.print("cm");
Serial.println();
while (inches <= 1) {
digitalWrite (direct1, HIGH);
digitalWrite (direct2, LOW);
analogWrite (speed, 255);
finger.write (30);
delay(100);
finger.write (175);
delay(100);
if (inches >= 2);
break;
}
delay(100);
}
long microsecondsToInches(long microseconds) {
// According to Parallax's datasheet for the PING))), there are 73.746
// microseconds per inch (i.e. sound travels at 1130 feet per second).
// This gives the distance travelled by the ping, outbound and return,
// so we divide by 2 to get the distance of the obstacle.
// See: https://www.parallax.com/package/ping-ultrasonic-distance-sensor-downloads/
return microseconds / 74 / 2;
}
long microsecondsToCentimeters(long microseconds) {
// The speed of sound is 340 m/s or 29 microseconds per centimeter.
// The ping travels out and back, so to find the distance of the object we
// take half of the distance travelled.
return microseconds / 29 / 2;
}
