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Asked — Edited
Resolved Resolved by DJ Sures!

Question On Ezb-4

I believe I remember that you said while the EZB3 had pull up resistors, the EZB4 will not. Are you going to make some sort of shield that we won't have to worry about it blowing up our sensors? I remember when i built the LEAF robot, I hooked all of the sensors up and blew every single one of them before I realized they needed to have a buffer/pullup conversion before plugging them in to the port. This concerns me. Just want to know exactly where we stand. I really enjoyed just plugging in to the EZB3 and not having to deal with this. Or, maybe I am talking about the 5 to 3.3v converter if the board does not have both.

Hope you understand what I am talking about. Also, I understand that the chip on the EZB4 is easy to blow up if you make ONE mistake on pluging the ports, ie; backwards. Hope you understand my point. At my age, I am sometimes Dislexy. You have a Beautiful product and I don't want to mess it up.

Thanks!


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#1  
Pull up resistors are for i2c devices through the i2c port. The EZ-B v4 has internal pull-up on the i2c ports. Some i2c devices will need additional pull up resistors of 4.7k and some even higher - it's up to the data sheet of the device.

Any microcontroller (including the EZ-B v3) will risk blowing the chip if something is plugged in backward - that is not specific to the EZ-B v4. All micros and all electronics will risk blowing if you plug in it in backwards. It doesn't matter what electrical circuit you have, if you plug something in backward it will risk blowing.

The power provided to the Digital I/O pins of the EZ-B v4 are not regulated and therefore contain the same amount of voltage that was provided to the EZ-B v4. This is to allow servos to operate strongly without generating heat from a regulator as the EZ-B v3 experienced.

The power provided to the Camera, i2c and ADC ports are regulated to +3.3 volts through a digital switching power supply.

As for +5 or +3 volt sensors, they will need a voltage regulator. We will be offering a voltage regulator adapter - but there are higher priorities at the moment.
#2  
Thank You, my friend. I am no longer in the Dark.

:-)