4/9/2024 0 Comments Arduino mega 2560 i2c pinsWhen the project is put in a box and the wires are added, then a ground wire to everything is simpler and safer and better to reduce noise. It is common practice for sensors and buttons. I suggest to put the buttons with one leg to GND as johnerrington wrote. I will try to make a few things clear, instead of adding to the confusing. I hope you don't get disappointed by the confusing posts. Research | Innovation | Technology With Electronics library Logic Signal Voltage Levels | Logic Gates | Electronics Textbook () Hardware Hacking 101: E01 I2C Sniffing, How to Listen to Your Arduino's I2C Bus - CUJO AI You searched for ARDUINO PROJECTS | Homemade Circuit Projects () (advanced) Platform specification - Arduino CLIĥ0 Best Arduino Projects for Final Year Engineering Students | Homemade Circuit Projects ()Īrduino-GPIO: BOARD Class Reference () Gammon Forum : Electronics : Microprocessors Overview | All About Batteries | Adafruit Learning SystemĪ Mini-Tutorial on Using GitHub for Arduino Projects « Adafruit Industries – Makers, hackers, artists, designers and engineers!Īrduino Tutorial - Learn electronics and microcontrollers using Arduino! () There is lots of "poetic license" used with break-out boards.Īs you are a self-proclaimed newbee, below are some articles and sites you may find benefitial in your early days of experimenting:Īrduino Memories | Memories of an Arduino | Adafruit Learning System in fact, some sensor boards have I2C termination resistors which is "nice" but may complicate using multiple sensors on the same I2C channel or not if the resistors are a higher resistance than recommended for single-ended devices. Leaving out pullup in I2C will not damage your Arduino. If you have question, come back and we can discuss more in depth because you will have a better understanding, mainly terminology. Pull Up Resistors | Working with I2C Devices | Adafruit Learning System Rather than regurgating somewhat confusing information, I ask you to read: You have achieved a great forward motion by realizing that there is much to learn. Welcome to the world of microcontrollers and particularly Arduino. The honest answer is that I've done all that because it's pretty much the first Arduino thing I do on my own and I'm a bit lost. Here is my code, for reference: #include I'm guessing those two lines are referring to the 50k ohm resistor that is integrated in the ATmega2560 chip and not the 10k ohm resistors that are integrated into the circuit and cannot be disabled.Īm I about to fry my sensors or is my set up alright? As far as I know, the Wire.h library that I used to establish the I2C protocol automatically activates the internal pull-up resistors from the pins 20 and 21 ( here, lines 88 and 89). The thing is, I don't have an amazing grasp on electronics and I don't know if I should be connecting the SCL and SDA cables to an external pull-up resistor. GiroscopiosMega_Fritzing 3213×1431 416 KB
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