Arduino Projects and Circuits |
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I already have one project where arduino outputs audio signal to USB speakers via software 10-bits PWM. In first, I was not satisfied with quality of sound generated via PWM. There are just not enough speed in arduino engine to run PWM well. For example for 20. 000 Hz audio, PWM has to be at least 2 3 times higher above normal frequency range, .
Often government data sets available to us online are taken from major nearby metropolitan areas or infrastructural centers. With an easy to follow introduction to new softwares and technologies the urban sensor kit allows anyone to obtain location specific information and share that information with a growing community of designers, researcher .
Measuring the consumption of a resource that has units by volume can be more tricky than it sounds. Use of resources such as water, gas, and even electricity is typically measured by gauges that determine either instantaneous flow rate or cumulative volume over time. Both techniques have problems: measuring flow rate at frequent intervals allows y .
Water is a precious resource in many parts of the world, and many people rely on water tanks to supplement their water supply by storing collected rainwater or water pumped from a well or bore. But how do you measure how full a tank is Tanks are constructed of opaque material to prevent algae growth and often kept closed up to prevent mosquito in .
I`ve been working on a project that will allow me to determine the number of sun hours available in a given spot, and track that over time, as a component of solar power installation design. The idea is to get a light detector in the sun, record the number of hours it is lit at full intensity, and map that to photovoltaic equivalence. .
I wanted to teach my Arduino to talk telephone, so I added a HT9000A DTMF chip to produce the familiar "touch tones" (upcoming projects will act upon "heard" DTMF tones, but with a different chip). The output is really low volume, so you may want to plug in amplified speakers or use an input on your stereo. You could build an amplifier .
To power it up you need a clean stable source of 5 volts DC. This means that you either pick up a switching 5v DC power supply from our favorite JK Electronics, mail order one from Jameco or you will have to wire up a voltage regulator. Page 254 of Phys Comp has a nice layout of a 7805 voltage regulator with a couple decoupling capacitors. Finally .
I love the Arduino as a simple and accessible controller platform for many varied projects. A few months ago, a purchased an Ethernet shield for my Arduino controller to work on some projects with a mate of mine it was a massive hit for the first time, I could control my projects remotely using simple software. That got me thinking The .
software on my MacBook Pro - such as the aforementioned Laidman & Katsura `s WaveWindow - WaveWindow is a software oscilloscope. It`s useful for anyone who works with sound on the Mac; it`s educational and fun to play with. and Faberacoustical `s Signal Scope - Oscilloscope - Digitize and visualize multiple waveforms and FFT Analyzer - Analy .
Nothing really new: a JFET is used to sense the electric field generated by high voltage electric line; the JFET amplifies the signal very little, but it lowers the impedence and provide current to a level suitable for transistor amplification. The two transistor can be any low power NPN scavenged from anywhere. The two-transistor are configured a .
Agy used for the first time Lilypad Arduino and LED s on a textile project called Blinky Bike Bag, combining her expertise in fabric hacking with electronics: The bike bag is made from umbrella material to make it waterproof, and I made it with safety features using the Lilypad light sensor and LEDs. My husband always forgets his reflectors but wi .
This evening as I came home from a paragliding appointment, I had a feeling that I must improve my yesterday-written RGB LED driver code. So I cleaned it up a bit, and wrote a lot of comments to make it more useful for educational purposes. I`m alredy over this level, but it`s fun to play with it. An RGB LED is just three LEDs in a single package: .
The power controller module used in the system takes input directly from a momentary switch and uses that to toggle a relay that passes mains power to the system’s transformers. The controller circuit operates at 12V and as I understand was chosen to allow a wider variety of fancy lower voltage buttons and power LEDs to be used. Getting the... .
Before I emailed Pablo Gian Villamil and he sent me on a link to his class notes (yay!) for Generating polyphonic sound with Arduino I tried to work out his circuitry from his various blog posts and component listings CMOS Hex Schmitt Trigger Inverter Integrated Circuit (74C14) or CMOS Quad NAND Gate Schmitt Trigger Integrated Circuit (CD4093) .
As a fully-featured Linux computer there are many external programmers that can be used with your Raspberry Pi to program the Atmel AVR range of microprocessors. It`s also possible to use the general purpose input/output lines (GPIOs) found on the Raspberry Pi to implement an ISP programmer with minimal extra hardware. I say "with minimal extra ha .
Working on the brightness problem, I know that the 4017 design did not work well because there was no way to turn off the sign while updating the shift registers. As a result I went back to having the Arduino directly drive the TIP120 drivers. Another possible solution might be to use an ULN2003`s as a level shifter. That would require a 6 or 7 vo .
I havebeen researching a project which will help me with my understanding of electronics, networking, and programming. I decided to build an online thermometer which could be used in applications that need temperature monitoring. I currently work in a lab environment where I test, troubleshoot, and calibrate equipment which is installed in nuclear .
This project implements a network connected water level sensor, measuring the level in the sump pit of my house. It`s connected to the home network and reports the water level by broadcasting UDP packets so that any computer can receive it and take action, such as sending out an alert or storing statistics. Before we go any further, let me just po .
Many educational haptic feedback devices use kinesthetic force feedback devices such as the Novint Falcon and the Phantom Omni. Although these devices are relatively cheap compared to other high end haptic feedback devices, they are still expensive for educational purposes. Our team has therefore decided to develop an affordable vibrotactile hapti .
After buying an arduino and some 8x8 LED matrices I really needed a project to make good use of them. At a similar time I also had become a bit addicted to twitter and had been reading up on the API with the intention of doing something cool with it, somehow these ideas all got rolled into one to give a twitter popularity meter. The system uses a P .
In this article we make digital thermometer on the Arduino Uno. In this Digital Thermometer temperature sensor used is LM35DZ. In other applications you can replace with LM35 temperature sensor such as DS18B20 and others. In principle, the sensor will detect the temperature, then go to the ADC (analog to digital converter) on the arduino Uno and .
Here the Arduino UNO schematic diagram (click to enlarge): About Arduino UNO: The Arduino Uno is really a microcontroller board based on the ATmega328. It has 14 digital input/output pins (of which 6 may be employed as PWM outputs), 6 analog inputs, a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP. Here the schematic diagram o .
The Dogm-graphics-module should be connected to the Arduino board as shown below. Pin 12 (MISO) of the Arduino board must not be used. Additionally the Dogm-graphics-module requires an addess line (A0) which can be connected to any output port. The following schematic shows the use of the dogm-graphics-module with a 3. 3 volt supply. The level tran .
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