Close
0%
0%

Android smartphone speedometer

Connecting reed switch to android smartphone, using minimum amount of components.

mis012Mis012
Following
Liked Like project

Just one more thing

To make the experience fit your profile, pick a username and tell us what interests you.

Pick an awesome username
hackaday.io/
Your profile's URL: hackaday.io/username. Max 25 alphanumeric characters.
Pick a few interests
Projects that share your interests
People that share your interests

We found and based on your interests.

Choose more interests.

OK, I'm done! Skip
Similar projects worth following
297 views
1 comments
0 followers
View Gallery
Connecting reed switch to android smartphone, using minimum of components. You probably already have everything you need, but you may not be willing to use it ;)

finished-working.mp4

final hardware working

MPEG-4 Video - 7.67 MB - 07/19/2018 at 09:42

Download

test.mp4

hardware prototype working

MPEG-4 Video - 4.48 MB - 07/02/2018 at 18:25

Download

  • 1 × android smartphone any android smartphone (you probably want root)
  • 1 × 4-pin headphone cable just cut open some headphones
  • 1 × 1M resistor probably can have other values, used as "dummy microphone"
  • 1 × reed switch I got mine from some cheap speedometer, if you have 3D printer or similar, you can print the "case" yourself
  • 1 × software something something Linux is not realtime enough? might need to try with a larger diameter wheel

  • Final Hardware

    Mis012 • 07/19/2018 at 09:44 • 0 comments

    So, moving on from the prototype, this is the final hardware. Now it's only software missing ;)
    See video (in files)

  • Hardware Prototype

    Mis012 • 07/02/2018 at 18:39 • 0 comments

    Cause I don't have a soldering iron near here, and cause I still don't know how I want to connect the reed switch (preferably using the original "connector", so I don't have to destroy a perfectly working thing (I had enough with the headphones), and cause the only 1M resistor I could find nearby is "prototyping only", I decided to just connect all the wires "somehow" and see if it all works together. And it does :)

    see the video for proof ;)

View all 2 project logs

  • 1
    wiring diagram
  • 2
    cut up some headphones with 4-pin plug

    If they have a mic+buttons box, you can pry it open and check if all 4 pins are connected. if they don't have a box, they're probably not.

  • 3
    obtain a reed switch

    My one is from a cheap  speedometer, so it's got a case and a magnet included.

View all 6 instructions

Enjoy this project?

Share

Discussions

juli aerzh wrote 01/08/2024 at 16:19 • point

By automating processes, software reduces the need for manual labor, saving businesses time and money. It also eliminates the need for physical storage, paperwork, and other costly resources. Additionally, software can help identify cost-saving opportunities and optimize spending https://pcwares.net/.

  Are you sure? yes | no

Similar Projects

My home automation sprinkler system with HA
Project Owner Contributor

My home automation sprinkler system

dadasdadas

How to make an easy inverter using old cfl transistor?
Project Owner Contributor

3.7V to 220V inverter use cfl transistor Utsource

electroniclovers123Electroniclovers123

A communicator for non-verbal disabled people. An acronym for SWitch to AlphaNumeric. An auditory scanned alphabet, message creator.
Project Owner Contributor

SWAN open source AAC

roger-curryRoger Curry

ENDURANCE ROBOTS Piano concert of George Fomitchev was recorded using SelfieBot
Project Owner Contributor

Piano concert of George Fomitchev

georgefomitchefgeorgefomitchef

Does this project spark your interest?

Become a member to follow this project and never miss any updates

Going up?

About Us Contact Hackaday.io Give Feedback Terms of Use Privacy Policy Hackaday API

© 2024 Hackaday

Yes, delete it Cancel

Report project as inappropriate

You are about to report the project "Android smartphone speedometer", please tell us the reason.

Send message

Your application has been submitted.

Remove Member

Are you sure you want to remove yourself as a member for this project?

Project owner will be notified upon removal.