The photo depicts a completed (bread-barded) locked anti-phase motor controller using general purpose transistors, which allows you to control small DC motors for robotics applications. The big picture problem is that a normal DC motor controller does not have the `braking` function, which allows for precise control. Solving this partially or comp
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letely is important because precise motor control is needed in robotics applications, and where cost is a factor. A DC motor is fairly cheap, dependent on size, compared to other types of motors. This tutorial shows you how to bread-board the motor controller hardware, and program the Netburner to output the lcked anti-phase PWM. It takes approximately 3 hours to complete. This tutorial`s motivation is to use the Embedded Netburner MOD5213 to control a DC motor for small robotics applications. Readers of this tutorial assumes the reader has the following background and interests: *If your computer does not have a 9 pin RS-232 Serial port, you will need to purchase a USB Adapter. They can be found almost anywhere on the internet, or in a computer store near you. Before we actually begin the motor controller, there are a few things that need to be addressed first. What is an H-Bridge, and what does it do (and) What is a locked anti-phase motor driver, and how does it work First of all, an H-bridge is a basic motor controller in which 4 transistors are configured with a motor to allow full forward and reverse of the motor, rather than just one direction. As you can see in the figure below, how the motor controller gets its name. In order to drive the motor forward, transistors Q1 and Q3 must be driven (while Q2 and 4 are OFF). To drive the motor in reverse, Q2 and 4 should be driven, while Q1 and Q3 should remain off. This...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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