Servo Motor Control using MATLAB

In this tutorial you will learn to make direct connection between your Arduino and Matlab, so that you can program your Arduino directly through Matlab. It is very useful when you are working on complex robotics like Robotic Hand, Humanoid etc. as you can process your complex program on your PC in Matlab and then directly program the results in Arduino. So let’s get started: First of all you have to downloa ...

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Talking Pumpkin

So my boss came to me one last week and said he wanted to scare the trick-or-treaters who came to his home, and the kids who would come to work during a special Halloween Walk the community does. Thus was born the talking pumpkin. In short, I used an Arduino, an SD card read/writer, and an ultrasonic sensor to trigger a sound byte when the kids walk past our pumpkin… something they would not expect. If you ...

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Analog Read Voltage using Arduino

This example shows you how to read an analog input on Pin 0, convert the values from analogRead() into voltage, and print it out to the serial monitor.  Circuit: image developed using Fritzing. For more circuit examples, see the Fritzing project page Connect the three wires from the potentiometer to your Arduino board. The first goes to ground from one of the outer pins of the potentiometer. The second goes ...

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Safe and simple AC PWM Dimmer for arduino / Raspberry pi

Dimmer With  MOSFET This circuit shows that dimmers intended for use at mains voltage do not always have to contain a triac. Here, a MOSFET (BUZ41A, 500 V/4.5A) in a diode bridge is used to control the voltage across an incandescent bulb with pulse-width modulation (PWM). The power supply voltage for driving the gate is supplied by the voltage across the MOSFET. add on board: raspberry pi diy add-on board S ...

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Sinewave Inverter Circuit Using Arduino

The post explains how to build a simple sinewave inverter circuit using PWM feed from an Arduino Uno board, the article also discusses a sinewave 3 phase inverter using the same input from an Arduino. The idea was requested by Mr. Raju Visshwanath The Design As per the request the first diagram below shows a single phase PWM sine wave inverter using an Arduino feed for the PWMs. The design looks pretty simp ...

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Boost Converter Intro with Arduino

Let’s say that you’re trying to drive a few Nixie clock tubes, or you want to make a strobe light. A variable high voltage DC power supply from 50-200+ volts may be required. Transformers are terrific, but difficult to find the right one and a pain to wind. Why not use a boost converter? They’re easy and don’t necessarily require a guru for basic operation. This guide is meant for the individual who wants t ...

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Extending PWM output pins with a Texas Instruments TLC5940 LED driver using arduino

Introduction Microcontrollers like the Arduino were designed to facilitate the use of electronics for designers and DIY enthusiasts. The interface provides a great starting points for a variety of elecronic circuit designs. However, as the microcontroller is standardized, it is also limited in its use. That shows for example in the limited number of PWM (pulse width modulation) enabled output pins. What can ...

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BennyP’s Light Contraption using arduino

Introduction Disclaimer: I am not an expert in any of this. There is lots of information online regarding such designs. Although this setup worked for me, do not trust any of my calculations. Please work all this out for yourself and consult many other sources, or it may spontaneously burst into flames. The contraption is a board containing two lights and a receptacle that are controlled by a computer commu ...

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Tiny Wearable LED kit – 12 PWM LEDs from a reprogramable ATtiny85

This instructable covers the assembly and use of a Tiny Wearable LED kit.  The kit is useable immediately but is desigend to be hackable and can be reprogrammed to your liking using an ISP programmer or Arduino board and the Arduino IDE. There are not too many tiny implementations of microcontrollers.  The Arduino lillypad is quite large and expensive and if you want to drive a dozen LEDs you still need to ...

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Pulse Width Modulation : PWM using Arduino

Pulse Width Modulation or PWM is a method of Digital to Analog Conversion. It helps in delivering analog average voltage using digital pulses of variable pulse width. By controlling the on time and off time, we can generate an analog average voltage using the digital pulses. PWM has a wide range of application. It is used in DC motor speed control, Brightness control of LED lamps etc. Here in this simple ex ...

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Webster: A Geometric Pattern Weaving Machine

We are three students from California College of the Arts in San Francisco in the Architecture program.  This studio is called Creative Architecture Machines and is taught by Jason Johnson and Michael Shiloh.  Webster is a geometric pattern weaving machine that takes inspiration from Islamic tiling, geodesic dome construction, weaving machines, and conventional 3D printers.  This 3-axis robot was an explora ...

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Simple Buck LED Driver with PWM Input

High-power LEDs over 1W are now quite inexpensive. I'm sure many of you are incorporating LEDs as light sources in your projects. However I realize that the finding and configuring the power supply is still not as simple as it can be; commercially available LED drivers are convenient, but often overkill or not flexible. Even my own Universal LED Driver can be overkill at times. Some projects call for a bear ...

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