One is to say what the things you want to measure are like, which will give you a spec for what you want the input resistance to be and you can then try and meet that with your design. As an example, the output resistance of ...
Hardware DFRduino UNO R3 (or similar) x 1 DFPlayer PRO x1 Jumper wiresSoftware Arduino IDE Download and install the DFRobot_DF1201S Library and Sample Program (About how to install the library?)Connection DiagramControl by ButtonTap the PLAY button to play or pause(Blue LED keeps on when ...
Using only the ~50K internal pull-ups in the chip violates the I2C spec on risetime. The only reason the internal pull-ups are even included in the library is because sooo many people don't know anything about I2C. Common values for external pull-up resistors is 4.7K to 10K, even ...
sometimes it even changes over time (not with Acc_Gyro that has a low pass filter that takes care of this). The Acc_Gyro is pretty stable in this respect, so if it’s spec zero-point is 1.23V you can expect an actual zero-value in range of 1.22..1.24...
and which board will you be using, mega adk or uno+usb host shield2.0; and if you are using a pend drive/usb hard drive, you will also need a power adapter connecting the arduino board because the laptop/ pc power supply to the 5v arduino board will not be enough ...