Fast PASTA: converting an HX711 module to 80 SPS

[@Rebar77_real]

Almost pulled the whole chip off to cut traces underneath it watching that other guys advice. This is way more newbie friendly. Thank you!

thanks, man!!!! did it easy, used a needle and a soldering, really fast and easy, working very well now!

[@dasboseimbusch7079]

I'm trying to build a quick shifter for a bike. This will help a lot. Big Thanks!

[@mguarin912]

Thanks man. I have a ton of this basic boards and needed an easy way to modify.

[@davorvirag]

Nice, I'm glad it was useful!

[@willywodka]

Hey Davor, thanks for the video h you seem like a HX711 expert, so i hope you could help me. I tried with a slightly different board. The Jopto CJMCU-711, which is also sold under some other names. It has two pads marked rate at the lower side. It does not seem to make a difference whether I bridge those or not. Output is still 10hz. The pin 15 is also always low. Would you have any idea what I did wrong?

[@rockybrewer]

Hello there, great video, I have a hx711 board that I brought, looked just like yours in the video on the amazon advert, but what I got it's slightly different where the little components are, have heard it may need resistor removing or moving to make it 80sps ? Do you think this might be true Thanks alot

[@davorvirag]

Sorry, I honestly have no idea. There are many variations of these little boards, but the main principles should be the same. You likely need to trace what is connected to what either visually, or using a multimeter to get to the bottom of it.

[@nexus4069]

Amazing

[@danineitorcool4697]

tnks 🙋

[@SpookyRipples9]

I am getting lag in input to a computer... It appears, on pressing button it notes 0.3s late. By running on 80SPS will this solve the issue? OR long wire (1 mtr + USB cable) causing the lag?! I made a DIY handbrake for racing games using loadcell, Hx711, Arduino Leonardo Atmega32u4.

[@Cdosier90]

I am having the same issue it's not the long cable because I've tested a short cable and long cable and there's no difference. Have you tried this yet? I'm going to give it a try and see if it fixes the input lag. Can't drift with a slow handbrake! Lol

[@davorvirag]

The default sampling rate of the HX711 module is 10 SPS which does seem a bit low in terms of gaming responsiveness. I'm not sure if you'll be able to achieve satisfying performance even at 80 SPS, but I think it's worth a try. I'm not sure if there are other readily available modules like this one that, for example, sacrifice the HX711's high resolution for faster sampling rate (if you find one, let me know!). A general purpose differential ADC chip might work, but it's not as easy to wire up from scratch compared to these little modules. Regarding wire length, if you mean the USB cable length, that won't matter.

[@davorvirag]

@@Cdosier90 Yeah, if you mean the USB cable, its length won't make a difference as it's just carrying a digital protocol, so it'll work consistently up to a certain length (I think a simple cable without repeaters can safely go to at least 5 meters and likely more? Not sure specifically, but I think it's defined in the USB standards).

[@HighOctaneNews570]

Did the input lag decrese with this change?

[@ahcmaddegree]

hello man. thanks for the explanation. if i need more than 80 sps, can i increase it maybe around 500-1000 sps ?

[@Ed.R]

You can get up to a maximum of 145 sps by putting a 20MHz crystal across the XI (pin14) and XO (pin13) pins. The data sheet is worth a read.

[@Cdosier90]

Will this fix input lag using Arduino as a game controller on PC? I have this board with a 20kg load cell and when using it on the PC it takes a second to register as well as releasing, and I need it to register immediately for a brake for sim racing

[@davorvirag]

I'm copy-pasting my response to a similar question: The default sampling rate of the HX711 module is 10 SPS which does seem a bit low in terms of gaming responsiveness. I'm not sure if you'll be able to achieve satisfying performance even at 80 SPS, but I think it's worth a try. I'm not sure if there are other readily available modules like this one that, for example, sacrifice the HX711's high resolution for faster sampling rate (if you find one, let me know!). A general purpose differential ADC chip might work, but it's not as easy to wire up from scratch compared to these little modules. Regarding wire length, if you mean the USB cable length, that won't matter.

[@Cdosier90]

@@davorvirag if you get a minute to check this out he is using a hx711 and I read in the comments that it needs to be switched to 80hz which I'm assuming it's what you are showing us in this video. Am I correct? kzbin.info/www/bejne/fXyZm5iVmNJ5fMU

[@davorvirag]

@@Cdosier90 I can't find the comments that you are referring to, but, since the video also uses an HX711 module, if you want to switch it to 80 Hz/SPS, I'm certain that the modification described in this video is the one you are looking for. Best of luck!

[@Cdosier90]

@@davorvirag thanks for your quick response and help! I appreciate it.

[@HighOctaneNews570]

Did the input lag decrese with this change?

[@СергейШевченко-г6ы]

👏

[@odissey2]

What a vandalism to brutally cutting the pin of the chip! Just heat it with a soldering iron and lift it up with sharp blade.