Introduction: Continuity Tester (Using Android Phone)

Continuity tester using android phone

Requirements:

1.Android Phone

2. 3.5mm jack or old headphone with mic

3. wire (multimeter probes is better)

4.Application

https://play.google.com/store/apps/details?id=com....

Step 1: Cut the Headphone

Step 2: Find the MIC and GND Wires

Step 3: Connect 3K Resistor Parallel to the MIC and GND

Connect 3K resistor parallel to the MIC and GND and connect the probes wire and solder it.

Step 4: Finally Insulate the Wires

Step 5: Install Application to the Phone

click to install app

https://play.google.com/store/apps/details?id=com.topstarcreations.continuitytester

Step 6: Testing.

click here to see the video

https://www.youtube.com/watch?v=djYh4hbMTLo

Step 7: Don't Check Charged Components

Comments

author
ara (author)2016-06-01

How do you read the voltage on microfone input?

author
topstarcreations (author)ara2016-06-01

using multimeter

author
ara (author)topstarcreations2016-06-01

Nice joke! How do you read from Android, from your cell phone? I don't think that your cell phone display messages based on multimeter measuring. You know what i mean. Apologise for my english.

author
topstarcreations (author)ara2016-06-01

Use the mic key event .

author
ara (author)topstarcreations2016-06-01

I'm a very beginner. I need just to find how to do it - few lines of code, in my opinion. I plan to use this in an educational program, using Rfo basic - don't have other Android programming knowledge. This is my last message. If you really want to help me, I thank you in advance. Sorry for inconvenience.

author
topstarcreations (author)ara2016-06-01

MainActivity.java

package com.topstarcreations.continuitytestersample;

import android.app.Activity;

import android.os.Bundle;

import android.view.KeyEvent;

import android.widget.TextView;

public class MainActivity extends Activity {

TextView valueChange;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

valueChange = (TextView)findViewById(R.id.textView1);

}

@Override

public boolean onKeyDown(int keyCode, KeyEvent event) {

switch (keyCode) {

case KeyEvent.KEYCODE_HEADSETHOOK:

event.startTracking();

valueChange.setText("1");

return true;

}

return super.onKeyDown(keyCode, event);

}

@Override

public boolean onKeyUp(int keyCode, KeyEvent event) {

switch (keyCode) {

case KeyEvent.KEYCODE_HEADSETHOOK:

event.startTracking();

valueChange.setText("0");

return true;

}

return super.onKeyUp(keyCode, event);

}

// catches the long press button event (longer than 2 seconds)

@Override

public boolean onKeyLongPress(int keyCode, KeyEvent event) {

return true;

}

}

author
ara (author)topstarcreations2016-06-01

Many thanks!

author
topstarcreations made it! (author)ara2016-06-01

This is the Output

output1.pngoutput2.png
author
topstarcreations (author)ara2016-06-01

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:paddingBottom="@dimen/activity_vertical_margin"

android:paddingLeft="@dimen/activity_horizontal_margin"

android:paddingRight="@dimen/activity_horizontal_margin"

android:paddingTop="@dimen/activity_vertical_margin"

tools:context=".MainActivity" >

<TextView

android:id="@+id/textView1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_centerHorizontal="true"

android:layout_centerVertical="true"

android:text="0"

android:textSize="100sp"/>

</RelativeLayout>

author
SaidovB (author)2016-05-29

aahh good idea but how to connect them i have this 3.3 mm jack like you exactly but i dont know what the color that i should connect with 3k resistoris

IMG_20160529_230146.jpg
author
topstarcreations made it! (author)SaidovB2016-05-30

Use GOLD and RED.

WIRE COLOR CODE.pngconection.jpginsulate.jpg
author
topstarcreations made it! (author)SaidovB2016-05-30

Use GOLD and RED.

WIRE COLOR CODE.pngconection.jpginsulate.jpg
author
topstarcreations made it! (author)SaidovB2016-05-30

Use GOLD and RED.

WIRE COLOR CODE.pngconection.jpginsulate.jpg
author
stateit (author)2016-05-22

What fusing on the leads should I use to protect the phone against inadvertently placing across mains voltage?

author
tsaltzman (author)stateit2016-05-29

if you don't know for 100% whether or not what you're working on is hot or not, than you shouldn't be working on it bro.

author
topstarcreations (author)stateit2016-05-23

Don't check the charged components. no fusing.

author
TFOzkorucuklu (author)2016-05-29

Cool project. I really want to do but I can't do it now, because my phone had died. :/

author
V4NZ777 (author)TFOzkorucuklu2016-05-29

you probably tested a condutor with voltage

author
BuhlMan (author)2016-05-29

Not a bad idea but as a technician in my past trade and current hobby, I will always relay on my trusted Fluke meters. Perhaps Fluke will come out with one (unless they one already)

author
eagas (author)BuhlMan2016-05-29

They do, although it is a Bluetooth interface for the 287/289 series multimeter. The actual measurement is done by the multimeter and it is sent to the phone via the accessory. Just for the sake of it, I own a 289 and I just love it, after a 179 and 115 series. If not the best portable meters surely in the top three.

author
Mjtrinihobby (author)2016-05-22

I love this instructable. I can't wait for full multimeter modules to be available for smartphones.

author
ironsmiter (author)Mjtrinihobby2016-05-24

something like this ?

I have multimeters in just about every tool box, and car (at least 6 or 7, spread about), but my smartphone is almost always on my hip. Between datalogging, and reduction in size, I am right there with you, in the "can't wait" group.

author
Mjtrinihobby (author)ironsmiter2016-05-24

hooray!

author

thank you sir.

author
DIY Hacks and How Tos (author)2016-05-22

Great idea! Having a continuity tester in your phone is much better than having to carrying around a multimeter all the time.

author

thank you sir.

author
ccray1954 (author)2016-05-23

what watt or volts are the 3k ohm resistor?

author

across the resistance below 0.5V

author
ccray1954 (author)2016-05-23

i like this and need one for my ground to antenna checking continuity...excellent might try to make myself...

author
Antzy Carmasaic (author)2016-05-22

Love the idea. Simple and easy to use. Do add a warning to remove any power from the circuit you are testing and make sure all capacitors are discharged, as your costly phone is at stake.

author

Thanks.. yes you are right.

I will surely add a warning.