The ultrasonic sensors are 5v devices. You will need to use a voltage regulator to drop voltage to 5v from 7.4 if you use the lipo pack. EZ sells voltage regulators for this purpose. They are inline regulators meaning that they connect from the ez-b to the sensor.

They are designed to be 1 per 5v sensor.

https://synthiam.com/Shop/AccessoriesDetails.aspx?prevCat=9&productNumber=98

This is the voltage regulator sold here.

Okay thanks, that is what I suspected to be the issue with sensor low power fails .Going with regulators would be the most simple fix, I should have ordered them at the same time as the sensors to keep shipping costs lower.

If you bought the sensors from EZ-B and they are 3 wire, not 4 wire, they have the regulator built in.

Alan

No they were older cheaper 4 wire sensors from robot shop Canada , I bought 1 first then another a month later which is why I was using a 5 volt battery pack for just the first one, I now wish I bought them from ez robot to avoid this problem.

Love the Ghost busters sound file

LOL! That Ghostbusters theme just had to be added considering what the robot's main purpose is. I am actually going back to that Haunted cottage property tonight where more than 2 people have died there in tragic circumstances. last time I had the robot on the spot where one guy burned himself in his mini van. After taking a few Thermal photos of weird hot and cold spots, (later the hot spot was just the damned Racoon again) but my Lipo battery went to EZB Low battery warning after only 15 minutes and that battery usually lasts me 2 nights because the motors run on another battery. The EZB has a 7.4 venom 5000 mah new battery! I want to see if that happens again tonight.

That racoon again haha.

You know im thinking of running your app on a bot and taking it to that hotel i mentioned because i know their is a ghost there, a very friendly one, i wonder if that ghost would remember me 30yrs later lol?

Looking forward to your findings.