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Need help for inverted pendulum project
Hello I have some questions about a inverted pendulum balancing project that I am doing and its my first time here is this the right channel btw?
Im trying to make an inverted pendulum project and I am using an arduino uno, Nema 17 stepper motor, rotary encoder with 600pulses/rev on a 2020 profile. The hardware is kinda done and the pendulum is a simple pvc pipe i found lying around and the angle is read by a rotary encoder attached at the pivot. My lacking is mainly code/logic wise I watched a video about deriving the equations of motion for a classic inverted pendulum (https://www.youtube.com/watch?v=5qJY-ZaKSic) and I want to ask,
With the data read/given to the arduino (ANGULAR DISPLACEMENT, ANGULAR VELOCITY, ANGULAR ACCELERATION, LENGTH OF PENDULUM, MASS OF PENDULUM) it should be using those values and calculating for the acceleration needed for the cart to move to try and balance the pendulum right? I am quite stuck because in equation 6 there is a variable F which to my knowledge is Mass*Acceleration so then do I just use the equation 5 to find the acceleration or does both equations 5 & 6 need to be used together to make such a thing?...
I need help with my Arduino project for school
Hello thanks for reading this😁,
I'm currently making a robot for school that should move his servo motors and must play saved wav files from the SD card, when a letter (for example h) gets sent trough Bluetooth (with HC-05) to the Arduino. My only issue is that for some reason I can't use the HC-05 and the SD Card Memory Modul at the same time. I can use the HC-05 while SD Card Memory Modul is unplugged and the letters arrive at the Arduino and the servo motors will move without any issue. And I also can send letters trough a USB cable connected to my pc, while the HC-05 is unplugged, and those letters arrive to the Arduino, the SD card will play the wav file and will move its servo motors without any problems. But every time I use both at the same time (HC-05 and SD Card Memory Modul, that's my goal) it seems like the letter gets sent to the HC-05 but will never arrive at the Arduino itself. I think the problem could be that the SPI of the HC-05 and the SPI of the SD Card Memory Modul are interrupting each other somehow, but I almost don't know anything about SPI lol😅.
I used Chat-GPT and watched tutorials online but nothing worked for me, I don't know how to fix this issue .
...
Can't turn string into a double SOMEONE HELP ME
For some reason line 38 returns an error. The user is expected to enter the price of an item on a 16-key pad. Press * to accept, # to decline. It's expected to convert the price thing to a double to add to the total, but why it aint working?
Timing LED challenge
Task
Blink at least 3 LEDs at the same time.
Each LED should blink at a different interval. For example the first LED blinks every 200ms, the second one every 500 and the third one every 900.
Rules...
