This part of the I2C interfacing project focuses on building an acceleration sensor, but in the process it also explores two other issues: advanced use of the PCF8591 chip (that we have already seen in the pressure sensor) and running the bus at 3. 3v. For the rest of myI2C series, see the table of contents. This project really shows the power of t
Click here to download the full size of the above Circuit.
he I2C bus in the NXT. Sensors that report a single analog value, such as temperature or pressure, can be built as analog sensors, just like the NXT`s sound and light sensors. But for an acceleration sensor that must report two or three values, the acceleration along two or three axes, anI 2C sensor is the only reasonable solution. Acceleration sensors are wonderfully useful. They can detect that a robot bumped into a wall, they can detect that it is in a free fall (open that parachute!), they can be used to estimate position and to count steps, and much more. They are so useful that it makes you wonder why Lego did not include one inside the NXT. There are two commercial acceleration sensors for the NXT, one from HiTechnic and several from Mindsensors. The sensor that I am describing here is better than all of these in some ways (it can be configured by your program to two sensitivities unlike all the commercial sensors that have a fixed sensitivity, and it measures acceleration along 3 axes, whereas some of the commercial ones are 2-axis sensors). But the commercial ones have higher resolution, and of course, you don`t have to build them yourself. The sensor uses an accelerometer called LIS3L02AS4, manufactured by STMicroelectronics. This device is a single silicon chip that contains sensing elements that can measure accelerateion in three directions and some analog electronics that make it easy to use the chip...
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.....
characters left: