This 4-20mA current loop transmitter has on-board screw terminals which make it easy to connect. The IC can control analog voltages that vary across the voltage supply range. if the address is same as old board turn the pot slightly and scan again. 2 - Reduce clock frequency of I2C to reduce effect of unbalance, impedance of long cable. The MAX7369 1:4 multiplexer connects the main I2C bus to one channel at a time. 2 is a flow chart illustrating a process to provide inter-integrated circuit (I2C) multiplexer switching as a function of clock frequency for the data processing system of FIG. Check out Switch IC Development Tools TCA9548A I2C Multiplexer (1 piece) reviews, ratings, features, specifications and more at Amazon. NXP Semiconductors I2C Multiplexer 1-Element 8-IN 24-Pin TSSOP T/R Cheap Integrated Circuits, Buy Quality Electronic Components & Supplies Directly from China Suppliers:1. Finally, a way to get up to 8 same-address I2C devices hooked up to one microcontroller - this multiplexer acts as a gatekeeper, shuttling the commands to the selected set of I2C pins with your command. It is one of the many G… step one – run i2c scan. Mouser Electronics uses cookies and similar technologies to help deliver the best experience on our site. I'm not saying it's impossible to do what you're trying to do, I'm just saying there might be better solutions available.I2c multiplexer ic the advantages and disadvantages of this communication protocol. Since you've already used some of your budget on the USB host shield and extender cables, you're likely succumbing to the Sunk Cost Fallacy. I would either start there, or with a custom controller "box" with a cable run to the individual inputs on the Arduino. Using a protocol that is intended to run that type of distance is an even better idea. A single cable that spans the entire distance would likely be a bit more reliable. Connecting a female USB port directly to the Arduino won't allow the Arduino to communicate over USB - if it did, then that USB Host Shield wouldn't serve much of a purpose!ĭoes it have to be controlled via the 360 controller? Using multiple USB extenders might be problematic once submerged. The magic that happens on the USB Host Shield is the translation between the incoming USB protocol and the SPI protocol that your Arduino understands.
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The longer answer is: SPI stands for Serial Peripheral Interface, which is a completely different protocol than Universal Serial Bus (how's that for a misnomer?). Regarding your 2nd question, the short answer is: No, it probably doesn't work like that. How was the robot powered when you ran this experiment? It's possible that your robot power supply is not beefy enough to power the extender and controller. When you hook up the controller to the shield over the extender, the shield is trying to power both the extender cable and the controller, which it might not have enough current to do. When you play the 360 over the extender, you're 360 is delivering the current to the controller. When you program the Arduino through the extension cable, you are using the computer to deliver current to the Arduino. It might have to do with the current delivering capability of the shield. Here’s the code: Let me know what you think. Do they work like regular tx/rx seriel lines? We pulled an old female usb harware out of an old computer and I feel like we should just be able to run those rx/tx lines strait to the mega (without the host shield), but I don’t want to mess with the current programming too much if possible. I read that the host shield runs to the mega via the SPI pins but i’m not familiar with those.
So it seems that the limiting factor is the Shield.Īny idea why the shield would limit the signal, but not the mega? Power issue? protocol issue? buad rate? We’ve done some troubleshooting: We were able to flash our mega from our computer through the repeater cable, we were also able to play xbox with the controller running through the repeater cable to the xbox console. Unfortunately when we add the repeater cable into the loop we loose the controller signal to the shield/mega. We have successfully programmed the robot with the controller, shield and mega, but we need to run the controller through 100ft (3-33ft) active repeater cable for our robot tether.
We are trying to run the robot off of an xbox 360 controller, usb host shield, and arduino mega. I’m a teacher from CT and my students and I are designign an underwater robot for competition.
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