1. The digital I/O are default floating until you do something with them. Download ARC and connect to your EZ-B v4. That is how you do something with the Digital I/O.

2. The digital I/O voltage pin is same as VIN

3. The ADC, Camera, and i2c ports voltage pins are regulated to 3.3v

The https://synthiam.com/Tutorials";" target='_blank' rel="nofollow">LEARN button on the top menu of this website will bring you to the Getting Started Guide. There you will find videos that explain the EZ-B and for those who are in a rush - you will find the Data Sheet. Here is a direct link to the Data Sheet: https://synthiam.com/Tutorials/Default.aspx?id=7

Answering questions in the forum outside of the DataSheet is bad news bears. If we answer a question and later need to update the datasheet, they will be out of sync. Like all products in the world, we provide a datasheet with technical information. We also go above and beyond by providing tutorial videos and explanations. You will find those in the Learn section.

You can access the LEARN section by pressing the LEARN button on the top of this website.

Reading through the posts again, it looks like Rich has already answered most of my question. So thanks @Rich! I would like to make sure I'm understanding this correctly though, especially with the way the resistors are configured.

There are no resistors for pull up or pull down. That's irrelevant to the EZ-B. You either turn a digital I/o high, low or query it's state that is controlled by another device. When a pin is set to input, it is floating.

If you want to pull up or pull down, you do that yourself externally.

Good to know the default condition of the IO is floating. I hear you DJ. There is a ton that goes into this, to put it very modestly, and keeping track of every little change can become chaos in a hurry. Thanks for such a quick response. I want to you know I really appreciate what you guys at EZ-Robot as well as the dedicated members of the community are putting into this. I'm excited about this unique product and have no doubt I'll get this figured out once I get to tinkering.

That's really nice to hear Thank you! I updated the datasheet just now with more detail. Specifically about the I/O voltage input and output.

This is why I prefer to direct people to the manuals and documents. If I answer the question in the forum, it's written for ever and never updated. The manuals go through revisions with updated information based on usage data.

Glad that's all cleared up now. tired

However it was a good discussion and one that needed to be had. It's important to know the limits and capabilities of both the V3 & V4. The change from the V3 in that the digital I/O voltage pin is same as VIN is huge. It's very easy to plug directly into a device and send the wrong voltage to it. For example I just did this to a servo yesterday while I was swapping out one of my V3's for a V4. I sent 12vdc to a servo I had previously installed and powered by EZB that was expecting 5vdc. I went to have a drink to calm down after that so I still don't know if it's damaged or not. Totally my fault but I simply forgot for a moment in my excitement about the change.

Anyway, we all process information and learn differently. Some need multiple forms of input to understand and sometime what your looking for in the "printed" information is overlooked or misunderstood. Also all of us have different levels of maturity and tolerance. Put all that together and we're just one big dysfunctional family.

Nothing's wrong here as I can tell. We're going alright. Let's keep it up and get through the growing pains together. Dad & Mom (EZ Robot crew) are doing a great and much appreciated job with an amazing product and company and trying to keep us all happy and safe and well fed at the same time.