Robot Building Questions

H-Bridge Max Input Voltage

What is the max input voltage for the 2.5 amp H-bridge? I am powering a 4wd thumper with 2 H-bridges and wanted to use my 18 volt Dewalt battery packs. is this possible?

E-Bay: Omnibot Head

Saw this on E-Bay. Thought maybe someone here might need a replacement. Omnibot Head Replacement

Rc Car Into Robot

hi, i have an associates degree in electronics that is to say i have somewhat of a fimiliarity with small electronics as i had very good teachers and have always been interested in such things. i beleive electronics, computers, and yes robotics are the future. as such i am looking for a fun project to get my young son interested in these things as...

Example Script For Facedetect.Vision.Detection.Haarrectangle

Hi, I have some Python code working that uses CameraFaceDetection.GetFaceDetection(), and I will post this soon. But it only outputs the region where the face is. I looked for an example script that calls FaceDetect.Vision.Detection.HaarRectangle, which I'm guessing gives exact coordinates. Can anyone point me to such an example? The language...

Motor Driver Or Esc For Large R/C Car?

Please help me buy a motor driver or ESC for a large R/C car. The car is VW New Beetle made by New Bright. It is over two feet long. I may have to replace the motor for steering front wheels with servo. The motor driving rear wheels is about 1-1/2 inches long.

Example Python Scripts Calling Ez_B.Dll

Hi, These are intended to be for guidance only, so others can get the idea of how to convert C# or VB into Python. They are probably only useful to people who already use Python. First step in to install IronPython from here: https://ironpython.net/download/ Ironpython is simply a version of Python with extra .NET bindings. At the IronPython...

Question About Digital Port Limits Re Leds.

Howdy, EZers! So, I'm putting together an IR emitter for one of my projects, and I think I've got it all within safe limits, but I wanted to run it past y'all just incase... The circuit is as follows... +5v ---- |>|---|>|---|>|----///---GND D0 ------L1----L2-----L3-----R1----GND Where: L1,L2,L3 are IR Leds, with a 1.2v forward voltage,...

Help With Syntax To Call Ez_B.Dll Functions (Python)

Hi, I've tried all sensible combinations I can think of to call EZ_B.dll functions in Python. I know if I can get the syntax right for one, the rest will follow. Any suggestion appreciated. David. ------------------------ from ctypes import * > libEZB = CDLL("C:\Documents and Settings\David\My Documents\EZ-SDK\DLL\EZ_B.dll") >...

Ez-B And L298 Motor Control

I have hooked everything up as per your tutorial. My goal was to control 2 motors independently. Currently I can only run the 2 motors simultaneously. I want the choice to run each motor forward or reverse without affecting the other. My speed control is working as required (1 channel controls the speed for both motors) Can anyone send me a diagram...

Sabertooth Battery

i need to get a battery for a sabertooth 2x12. i wanted to know what other roboteers have used. this is whats in the downloadable pdf. Input voltage: 6-24V nominal, 30V absolute max. Output current: Up to 12A continuous per channel. Peak loads may be up to 25A per channel for a few seconds. These ratings are for input voltages up to 18v in still...

Wrist Ideas

Hey everyone. I have been in hardware mode right now, but have been creeping the forum.. eek I am building a humanoid type of bot. Its just from the wast up type of thing. with two arms and two different hands. It will have some type of head also. Right now I am working out a BOM for the arms and I have gotten the shoulder and elbow joints figured...