Hardware and Electronics Used: Arduino UNO, HX711 ADC Load cell amplifier, Load Cell (2Kg); Currently, I am working on a project which requires me to put load cell along with the other circuitry in an enclosure to make it water-resistant... But while doing so, the weighing platform and the base come in contact (as shown in picture 2). This messes up the readings. I 3D printed various loading styles and tried out a few different configurations but none of them seem to work. The configuration that is shown in Image1 is an ideal one that yields precise results irrespective of where you place the load on the weighing platform. The configuration in Image2 yields fluctuating readings which make no sense whatsoever. Can you suggest to me some way by which I can design a proper enclosure around the load cell and the circuitry in order to get proper readings and also keep it water-resistant?
Because 3d printing a hard case solution, will create a hard barrier which will affect the weight measurement, you'll probably need to consider some sort of flexible isolation method.
A quick (and not so eye pleasing solution) if
a) the project does not need to be submerged in water
b) if you are not so much bothered about appearances
is to consider isolating with a thin film of small weight. One possible solution for that (and depending on the size of the load cell would be to use an ultra thin transparent nylon bag.
- put the load cell inside the plastic bag and zip-seal around the cable going in.
- you could 3D print a box to house the load cell and then put on top a very loose plastic film.
Hi I think a 2 part enclosure would work with this. You need to make sure you have enough tolerance between all of the components so that they do not interfere with the load cell accuracy. I have shown a design of the 2 part enclosure which makes the design water resistant by not allowing a large flow of water up the enclosure.