All posts on September, 2008



C Framework on POSIX systems

 

C Framework on POSIX systems
This sample application is written in C, and should work on most POSIX compatible systems, such as under Linux and Cygwin for Windows. This project developed onย�Linux based eee PC ultra portable notebook. It includes code for using the Wombat’s generic HD44780 LCD driver.[more]


Posted in : Computer projects

BattMan II: A Computer Controlled Battery Manager

 

BattMan II: A Computer Controlled Battery Manager
BattMan II is a computer controlled battery manager, intended for typical rechargeable batteries used by R/C and electronics hobbyists, as well as various consumer product batteries.BattMan II is a fairly complex project.It consists of five subsystems: power supply, current control, battery connection, voltage measurement, and logic power.[more]

Posted in : Battery Charger

Precision Battery Discharger

 

Precision Battery Discharger
This is a precision battery discharger for 8.4V 7-cell Ni-Cad or Ni-MH batteries. The project made a cheap, reliable discharger circuit with an easy visual indication of the batteryโ€™s state (discharging or discharged) with less than 10$ of parts. Most parts can be found around the house or taken from broken electronic equipment - or at worst, purchased from Radio Shack.[more]

Posted in : Battery Charger

Dual DC Motor Control

 

Dual DC Motor Control
This project will be created for use with 2 LMD18200 H-Bridge ICs. These H-Bridges are capable of driving a motor with a voltage range of 10V-DC to 55V-DC with up to 3A continuous. It can drive the motor at a variable speed and reversible direction. It also has current sensing and thermal overload protection.DC motors can be controlled from the OOPic in a variety of ways utilizing everything from relays to power mosfets. This project shows how to configure two oPWMs and some oDIO1 Objects into a Virtual Circuit that will control the speed of two DC motors. with simple commands like M1Speed = 10 for a slow speed, M1Speed = 255 for full speed, and even M1Brakes = cvOn to slam on the brakes.[more]

Posted in : motor controller | robot projects

Make an Adjustable Voltage motor controller for bench top motor testing

 

Make an Adjustable Voltage motor controller for bench top motor testing
One of the nice things about flying electric is you can test run your motor in the house, workshop, or in the yard and the neighbors won’t complain. The problem is how to control the speed of the motor. One way is to use the plane, radio, and speed control with the motor in it. That’s no fun! Mount the motor on the bench and just plug the battery into the motor. That’s even worse! It’s hard on the motor and gearbox. [more]

Posted in : motor controller

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