BIG project, creating a dynamometer

Hello all,

I have decided to do a big project by myself, that it to create a dynamometer, saving the load data on an sd card and also printing the load on a screen.

Do do that i recently oredred:

  • An Arduino REV 3 card,
  • A breadboard,
  • Cables
  • Connectors
  • An HX 711 Amplifier
  • A load cell (not the S type yet)
  • An LCD screen
  • An sd card reader module

What I want to do:

I am creating an tensile strength machine that will pull on a piece of tissue, and I want to collect in an SD card and print the load data on an lcd screen.
I did not bought an S load cell sensor yet because I want to test myself with the load cells used to create scales to some extent.

Is it possible ?

Thanks for your answers,

Regards,

Vincent

Yes.
Do you have programming experience (any language is okay) ?

A few notes:

  • What is your power supply ?
  • You need a SD module that is compatible with a 5V Arduino board.
  • You need a good quality SD module, or else the SD socket has bad contacts.
  • Can you add a laptop and remove the SD module with the display ?
  • Do you need a menu on the display ? I never do that, because I don't like LCD display menus.
  • The Arduino Uno has a small sram memory and the SD library uses a lot of memory. You can only add small libraries.
  • Are there buttons ?

Hi,
Welcome to the forum.

Please read the post at the start of any forum , entitled "How to use this Forum".
OR

It looks possible, first get used to using each of the modules separately.

Googling

arduino SD module
arduino HX711
arduino (what ever model LCD you get)

Will give you plenty of info and examples to get you started.

Thanks.. Tom... :slight_smile:

dynomometer is associated with rotational forces and rpm.

TomGeorge:
Hi,
Welcome to the forum.

Please read the post at the start of any forum , entitled “How to use this Forum”.
OR
https://forum.arduino.cc/index.php?topic=712198.0

It looks possible, first get used to using each of the modules separately.

Googling

arduino SD module
arduino HX711
arduino (what ever model LCD you get)

Will give you plenty of info and examples to get you started.

Thanks… Tom… :slight_smile:

Thanks Tom, I’ll do that,

Regards,

Vincent

bluejets:
dynomometer is associated with rotational forces and rpm.

Aren't you thinking about a tachometer ?
Vincent

Hi,
The OP is building a tensile stress testing jig, dyno is probably not the correct name for it.

Tom.... :slight_smile:

Koepel:
Yes.
Great.
Do you have programming experience (any language is okay) ?
Well I'll do that with the arduino language. However I am an absolute begginer.

A few notes:

  • What is your power supply ?
  • Good question, i'll first the electric grid and then a battery.*
  • You need a SD module that is compatible with a 5V Arduino board.
  • I can give you the link of the one I have ordered.*
  • You need a good quality SD module, or else the SD socket has bad contacts.
  • What do you mean ?*
  • Can you add a laptop and remove the SD module with the display ?
  • That is what I want to do, write the values on the SD card to read them on a pc.*
  • Do you need a menu on the display ? I never do that, because I don't like LCD display menus.
  • No I do not.*
  • The Arduino Uno has a small sram memory and the SD library uses a lot of memory. You can only add small libraries.
  • So I cannot use this Arduino card ?*
  • Are there buttons ?
  • Not yet, why ?*
  • Thanks, Vincent*

bluejets:
dynomometer is associated with rotational forces and rpm.

There are also "shock dynos" for testing automotive suspension dampers; they measure axial forces associated with compression and rebound (as well as a bunch of other parameters.)

e.g. https://www.intercompracing.com/8hp-variable-speed-shock-dynamometer-p-10033.html

You can use the SD library with a Arduino Uno, but not with another large library.
For example: SD library + Ethernet library + sensors.
Or: SD library + a long Neopixel ledstrip.
Or: SD library + the Adafruit graphical OLED library + a sensor.
You don't have any of that, so you can use SD library :slight_smile:

The data that you store on the SD card is important. Spending a few cents extra for reliable storing your data is worth it.
When you buy a cheap SD module, then it has a cheap SD socket with flimsy and corroding contact pins.

Koepel:
You can use the SD library with a Arduino Uno, but not with another large library.
For example: SD library + Ethernet library + sensors.
Or: SD library + a long Neopixel ledstrip.
Or: SD library + the Adafruit graphical OLED library + a sensor.
You don't have any of that, so you can use SD library :slight_smile:

The data that you store on the SD card is important. Spending a few cents extra for reliable storing your data is worth it.
When you buy a cheap SD module, then it has a cheap SD socket with flimsy and corroding contact pins.

Oh okay its totally clear now !

doe_john:
Aren't you thinking about a tachometer ?
Vincent

Not on this planet..............

A dynamometer or "dyno" for short, is a device for simultaneously measuring the torque and rotational speed (RPM) of an engine, motor or other rotating prime mover so that its instantaneous power may be calculated, and usually displayed by the dynamometer itself as kW or bhp.