Frame for blood-pressure meter

thingiverse

Hi, this is a frame to convert an Omron M3 blood pressure meter to automatic working, making a night blood pressure holter while you sleep without modifying the meter. The Arduino controlled servo mimics your finger movements just like when you are awake. A basic Arduino code is included, which I used with an Arduino Due for another project but recommend using a UNO instead - simply rename and arrange the input and output variables for convenience. The connections are straightforward and can be found on the Arduino webpage (https://www.arduino.cc/en/Tutorial/Sweep). A brief description of the code is also included in the .txt file. You can use any timed automation with a small servo, such as the SM-S2309S, which fits perfectly in the frame. The servo lever has a magnetic tape cassette wheel at its end, equipped with a soft o-ring or similar to simulate the gentle touch of your finger (see photos). Before mounting the servo, you'll need to remove the four thin triangular supports by cutting them away. To secure the frame to the blood-pressure meter, I used a screw and nut solution - feel free to experiment with something better (the Arduino board must be removed to access the meter). I suggest attaching the Arduino board to the top edge of the frame using only two screws for easy removal. The STL file does not include holes for mounting; it's best to drill them by hand. When testing the Arduino, I found that a 9V battery did not work - I had to use a handy transformer with the programming cable to power the device, making it portable.