what is the unit of the value recorded by the accelerometer adxl335? i hope you to help me
@fauzie: The ADXL335 provides 3 analog outputs that are proportional to the acceleration detected (example product). According to the ADXL335 datasheet, 0 g is represented by half of the voltage source.
Which micro controller should I use for 40v 45 amp motor
@Dhirendra Meher You can take a look at our 30A+ DC motor controllers here: https://www.robotshop.com/en/high-power-motor-controllers.html
A selection are able to drive up to 60V (so 40V is not an issue) and past 45A. Ex: https://www.robotshop.com/en/roboteq-mdc1460-1x60a-7-60v-robot-controller.html
is there a way that a MPU 6050 can activate a servo motor at a certain z height?
@Erick Rojas Not directly - you need a microcontroller as well and program it accordingly. Note too that the height will be relative as opposed to absolute since the accelerometer only measures acceleration, not absolute position.
@Coleman Benson. Could you point me in the right direction to start for the following project that I am thinking about completing. I’m only a very basic amateur in electronics and programming. I’m hoping to build a cube with a different colour on each side, I’m hoping to use an accelerometer, RFduino and a transmitter and receiver to send/receiver the data which will activate a vibration motor in the receiver (or an iphone) a number of times depending on which colour is facing up. Can you help?
@Derek Based on what you describe, you actually seem to know what you’re doing. You need the Arduino, transceiver, 3-axis accelerometer, battery pack, vibrating motor and LEDs. The accelerometer will tell you which one is facing “up”. It’s up to you how you want to arrange the LEDs or choose an EL panel. For more info, please create a new topic on the RobotShop Forum.
@Coleman Benson I am undertaking project about a smart boxing glove. The boxing glove is to measure the strength and speed of each punch during a fight and to keep track of number of punches thrown in real time and be display on a mini screen. Or there should be a display when there is a contact with the glove, could you please point me in the right direction as what material to use.
@Ben Sockono Since the question is more design related, we invite you to create a new topic on the RobotShop Forum (best not to have a lot of comments related to a specific technical question here).
i would like to know more about the implementation and basic concept about accelerometer inside uav
@syafiq How can we help? There are many articles online about the inner workings of MEMS accelerometers / gyros. In a UAV, they help by sensing angular acceleration and linear acceleration.
Which sensor should i use for measuring vibration ? Accelerometer or gyro or imu ?
@kbk If you want to know the amplitude of the vibrations, an IMU is best, and does not cost much more than an accelerometer / gyro.
i want to build a rocket deployment system using gyroscope to trigger servo at a specific angle. can you please help me
@vinas Gyros measure angular acceleration rather than absolute angles. You should use an accelerometer which can measure the gravitational pull of the earth, and as such give you an absolute angle. Most applications involving rockets use both an accelerometer and a gyroscope (called an inertial measurement unit, or IMU).
I’m trying to use an IMU with my arduino uno to measure location and be able to detect a fall. We have parameters that are fall detectors of a person and are trying to input it into our imu code that we got from the arduino site. we are then trying to translate this program to activate a solenoid. is this all possible?
@brookez Certainly. Note that the solenoid might consume too much current than the Arduino’s IO pins can provide - consider using a relay.
@Coleman Benson Mr Benson, can you give me an idea on how to calculate wave velocity, the hardware needed and the connection? Right now i am doing a project to protect the shore’s of an island using a buoy. My idea is to use accelerometer to calculate the speed of the wave. Right now i have an Arduino Uno, GY-621 accelerometer, data telemetry and OSD. Thank you in advance
@Nufail The issue is that, as far as I understand, an object on a wave does not necessarily travel with it at the same velocity. You might consider two “sensor rigs” spaced apart but in contact with each other (they know their distance relative to each other using GPS and can wirelessly communicate with each other) and able to measure the time it takes for waves to raise and lower them. After that, you’ll need to research the formulas needed to calculate velocity of waves based on distance and height etc.