Robot Building Community

Help With This Error - Object Reference Not Set To An Instance Of An Object

Good Evening, I am attempting to write servo information to a file (C:\SERVO\INFO.txt The process and order that I am using is: $filename = ("C:\SERVO\INFO.txt") :start $servo1 = "" FileReadReset($filename) #opens file for reading sleep(50) FileDelete($filename) #deletes the file becauase I want a new one every time sleep(50)...

2 Direction H-Bridge Controllers?

Afternoon All I just want to confirm there are no 2 direction H-Bridge Controllers (back and forth)? I only see 4 direction options. Thanks, Daniel

Move Servos According To Camera Coordinates

Hi everyone, I've been playing around with the color tracking on my JD and while I can get the tracking to work, I'm having trouble getting the servos to move in response to seeing a color. Here is the code I have been using to try and Identify the color blue and then point in the general direction of the blue object:...

Powering Off The Ez-B At Low Battery Warning

I'm looking to implement a way where as the EZ-B moniters the LiPo battery voltage, it will trigger a script to say "Low battery. Robot is powering down" when the low battery warning activates, and proceeds to switch the EZ-B off, possibly triggering a relay so it breaks the connection between the battery and EZ-B, and then I can charge...