Arduino Projects and Circuits
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This project is influenced by the effort to achieve a security system that can be used in the business, or even very simply at the door of your home. This security system uses the microcontroller of the Arduino Uno system in combination with RFID (radio.... -
Once the circuit gets current, all variables are initialized and the loop function is continually running. Initially all LEDs are off and there is no signal at the output. By pressing the signal switch, the first light that shows the most signal is at the.... -
If you're not familiar with the Arduino, it is "an open-source electronics prototyping platform based on flexible, easy-to-use hardware and software". It has a small microcontroller, a USB port to connect to your computer for programming, a power socket for.... -
This page covers only the details of MIDI communication on the Arduino module. For a more general introduction to MIDI on a microprocessor, see the MIDI notes on Tom's physical computing site. MIDI, the Musical Instrument Digital Interface, is a useful.... -
Fortunately, my trusty Arduino came to the rescue I created an Arduino-based AVR programmer that uses the high voltage programming mode and can fix pesky fuses like RSTDISBL. The Arduino has just enough IO to implement the entire HV protocol plus a go”.... -
The Circuit is composed of two sections, the light sensing and the power switching. The light sensing part consists of a photo-resistor R4, connected like a voltage divider to R2. Since the resistance of the photo-resistor changes depending on the amount of.... -
Make your own Guitar Effects Pedal with an Arduino board. Bit crushing, rate reducing, weird noises. 10-bit effects/guitar pedal with an Arduino for lo-fi DSP.. -
Build a Guitar Looper with an Arduino board. Here is how to produce pedalboard for electric guitar. The idea is to connect pedals to the Arduino, and to use them to control a software of sound processing in Pure Data. Here I show you the example of a.... -
A programmable 8 step tone sequencer using an Arduino microcontroller. Features a 2 line x 16 character backlit LCD display.. -
A quick circuit showing how to control the speed of a DC motor with a potentiometer with your Arduino board. Also shows how to use a TIP120 transistor to allow the Arduino control a larger power supply... -
An attempt at an Arduino guitar pedal. The guitar signal feeds through a PT2399 delay circuit, modified to include a JFET preamp phase. The delay circuit has Echo and Delay knobs. From there, it feeds into an optoisolated-Arduino-5V preamp, and out to the.... -
The Arduino system offers an easy and open-source method for programming microcontrollers. Normally this means using a serial cable or USB cable attached directly to the microcontroller project. But what if your project is floating in a weather balloon,.... -
Programming the GPS Disciplined Oscillator (GPSDO) with the QP state machine framework -, which I badly need to write up - has led to the conclusion that I`ve run out of SRAM on the the Arduino Mega 2560 system. Not surprising given that there`s only(!) 8 kB.... -
Added a BASIC preprocessor made in python that allows you to write code withought line numbers and to use labels. the preprocessor adds the lines and changes the labels to line numbers. Also made an AmericanFootball BASIC game, as an example of how to use.... -
The world is going nuts over the Raspberry Pi single-board computer (SBC) for being a whole system under $50. In reality though the Pi isn`t actually the cheapest computing device available. If you want really cheap how does $13. 50 sound for a mini computer.... -
So far the idea has been to show you how the Arduino Uno board and its Atmel ATMEGA328P microcontroller can interact fairly simply with the outside world. This time we`re simplifying the electronics but ratcheting up the demands on the microcontroller by.... -
So far in this series we`ve had a diverse look at how Arduino can interact with a range of real-world devices from servo motors to ultrasonic range finders TVs to humidity sensors. Now we`ll see if we could get the Arduino to make a few sounds. We`ll.... -
In this one, servo is programmed to be controlled by two buttons, one turns servo to the left and the other one turns it to the right. When the servo is turning, corresponding LED will be switched on to indicate the operation. Because Arduino has built-in.... -
Having your Arduino control higher-power devices like lights, motors, pumps, doors, and many more is one of the most interesting and useful applications you may get involved with. But it can be a little difficult and possibly dangerous when power line.... -
Arduino can drive many kinds of motors. But the low-power signals from Arduino need to control high-power circuits to run the actual motors. Here we will give examples of ways that Arduino can control different types of motors of different sizes. A Motor.... -
This manual will show you how to use each of the components in the kit, and give you software Sketch examples for each one. Then you can combine some components to make examples of Automatic Systems such as a lighting controller. The Arduino "IDE" software.... -
The Arduino GSM Shield connects your Arduino to the internet using the GPRS wireless network. Just plug this module onto your Arduino board, plug in a SIM card from an operator offering GPRS coverage and follow a few simple instructions to start controlling.... -
The text of the Arduino reference is licensed under a Creative Commons Attribution-ShareAlike 3. 0 License. Code samples in the reference are released into the public domain. .. -
A potentiometer is a simple knob that provides a variable resistance, which you can read into the Arduino board as an analog value. In this example, you`ll connect a poterntiometer to one of the Arduino`s analog inputs to control the rate at which the.... -
Connect the longer, positive legs of (anodes) 12 LEDs to digital pins 2-13 through 220 ohm current limiting resistors. Connect the shorter, negative legs (cathodes) to ground. moves through each of the LEDS one by one, from the lowest pin to the highest..... -
The bar graph - a series of LEDs in a line, such as you see on an audio display - is a common hardware display for analog sensors. It`s made up of a series of LEDs in a row, an analog input like a potentiometer, and a little code in between. You can buy.... -
This example shows how to use SPI communications to read data from a SCP1000 Barometric Pressure sensor, and how to then post that data to the web by using your Arduino/Ethernet Shield combo as a simple web server. Using the Ethernet library, your device.... -
This example demonstrates one techinque for calibrating sensor input. The Arduino takes sensor readings for five seconds during the startup, and tracks the highest and lowest values it gets. These sensor readings during the first five seconds of the sketch.... -
A piezo is an electronic device that generates a voltage when it`s physically deformed by a vibration, sound wave, or mechanical strain. Similarly, when you put a voltage across a piezo, it vibrates and creates a tone. Piezos can be used both to play tones.... -
The Liquid Crystal Library allows you to control LCD displays that are compatible with the Hitachi HD44780 driver. There are many of them out there, and you can usually tell them by the 16-pin interface. Before wiring the LCD screen to your Arduino we....
New Circuits
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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.....
Popular Circuits
Q1 & Q2 provide linear frequency operation of IC1 following P1 resistance variation. Q3 was...
This project uses an LM3915 bar-graph IC driving two sets of ten LEDs for a 30dB range. The...
This design used to measure air or gas flow works by measuring the energy required to maintain a...
A variable frequency, variably duty cycle 555 configuration in astable mode. I`m using a set of...
AH1751 is a single-digital-output Hall-effect Sensor for high temperature operation. The device...
This simple code lock circuit described here is of an electronic combination lock for daily use....