Prolonged severe weather across the U.S. is causing delays including the ability to transport and deliver packages in certain cities. Please see here for more details. Thank you for your continued support and patience.


Please see all COVID-19 updates here as some shipments may be delayed due to CDC safety and staffing guidelines. If you have an order or shipping question please refer to our Customer Support page. For technical questions please check out our Forums. Thank you for your continued support.


Member Since: August 7, 2010

Country: United States

  • Did some alterations on .ino. Maybe it runs directly, without alterations now.

  • Arduino code trial uploaded on Github:


    Code was not verified.

  • Matlab code on Github:


    As soon as I have time I will port to Arduino as the code is simple and moving averages have specific libraries already coded.

  • Hi, I did not have time to port to Arduino, but the code is very simple. I am posting today, because is the last day... Approach is three moving averages to smooth the instantaneous acceleration delta and a lower limit to discriminate low acceleration change that is not a hit. Parameters were established on trial and error to better suit the known results. Code was tested on Matlab (have fun):

    cont=0; % hit count delta=0; % acceleration instantaneous delta finalmean=0; % acceleration smoothed firstmean=90; % parameter for first moving average secondmean=110; % parameter for second moving average thirdmean=30; % parameter for third moving average lowerlimit=80; % hits are above this limit for i=1:length(x)-1; delta(i)=abs(x(i+1)-x(i))+ abs(y(i+1)-y(i)) + abs(z(i+1)-z(i)); end; finalmean=movmean(movmean(movmean(delta,firstmean,'omitnan'),secondmean,'omitnan'),thirdmean,'omitnan'); for i=1:length(finalmean)-2; if (finalmean(i+2)<finalmean(i+1)) && (finalmean(i+1)>finalmean(i)) && (finalmean(i+1) > lowerlimit); cont=cont+1; end; end; display(cont);

    x,y and z are your inputs and cont will give you the hits. On Arduino I believe it can count the hit in real time, after less than 1 second of turned on. Results: 3: 77 (77), 4: 81 (81), 5: 91 (93), 6: 79 (79), Mistery 1: 190, Mistery 2: 161.

  • Guess where is the other horn ?

No public wish lists :(