Arduino Projects and Circuits
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Program an ATmega1284p with my AVR Dragon and the Arduino IDE. So far I have installed mighty1284p, after writing my sketch. I compile it using the Arduino IDE and then cd into the (temporary) directory the sketch is build in. It contains the. hex file, as.... -
Control a relay from an Arduino compatible board. When I try to activate the relay from the Arduino it takes at least a second to switch closed and sometimes does not switch closed at all. Digital pin 2 of the Arduino is connected to IN0 of this circuit.... -
With a 9 V DC battery, it worked fine. But because of a less DC power, solenoid was not generating a powerful enough force. I modified a computer power supply as the power source. Now when providing +12 V (15. 0 A) power from it, the solenoid valve is pulled.... -
An analog output for my Arduino. The most common way to build a DAC is to use a R-2R ladder circuit. However, this DAC has no output buffer, which would make this circuit a bit more reliable and working with all kinds of loads. For the best results, you.... -
A DIY intervalometer for my Sony NEX 5N camera so that I could do time-lapse photography. This intervalometer should work with most Sony cameras: NEX, Alpha and other. To work intervalometer used infrared LED Serial LCD has 4 output: GND, VCC, SDA, SCL. SDA.... -
The Arduino microcontroller board is able to supply a current of 40mA from its output connections. These digital outputs are fixed at 5V ON or 0V OFF . This is adequate for working with LEDs but devices such as motors, solenoids, high brightness LEDs etc..... -
The Nixies I`m using have 10 cathodes (shaped like numerals) and a screen-like anode. These are old Russian IN-12A`s that I obtained from an excellent Ukrainian shop on eBay. Other Nixies might have more cathodes for a decimal point or other symbols (like.... -
The heart of the switch controller is an Arduino Nano micro-controller - this is going to be the interface between the dashboard switches, wireless steering wheel buttons and the car`s lighting, indicators, windscreen wipers and DigiDash2 GPS stopwatch. This.... -
I finally got all of the materials I needed in to work on my arduino powered Diversity controller. The plan is to support 2 inputs (though the hardware can support up to 4 inputs), and 4 amplified outputs. The diversity will use RSSI to compare feeds and I.... -
You can easily build a barebones Arduino yourself. This project shows a breadboarded Arduino without an FTDI chip. This means no USB connectivity (this could be however accomplished using a USB-Serial breakout board). Use an ATMEGA168, a 1k resistor, a.... -
The high-tech credit card has been nicknamed "microcontroller super card" because of all the great improvement ideas. I showed how to first verify the code, and then upload on to the arduino board. I then wrote a code for the counter to go from 0 to 9 using.... -
A few weeks ago, it came to my attention that IKEA do a set of colour-changeable LED strips. I ve been looking for a decent way of providing .... -
Have finished documenting/cleaning the code for my Jaycar el-cheapo Thermor/BIOS branded wireless weather station receiver. The basis for the code comes from the Practical Arduino weather station receiver project. In the end all it took was a week of.... -
If you ever wanted to integrate RFID functionality into your project, this small tutorial might help you accomplish that. I used the RDM630 module from seeedstudio in its UART version. It comes on a small board with presoldered connectors which fits.... -
The next board I want to show you is the ADJD-S371 Color Light Sensor Evaluation Board from sparkfun. It emits light and analyses the reflected color spectrum. The board can be controlled via I2C. The sleep and xclk pins were not used in this example. I.... -
I`ve been looking around for a mains (220-240VAC) power monitoring circuit that I might be able to interface with an Arduino. There is of course the OpenEnergyMonitor solution, but they seem to use a transformer to isolate and measure the mains voltage. The.... -
Arduino is an open-source electronics prototyping platform based on flexible, easy-to-use hardware and software. It`s intended for artists, designers, hobbyists, and anyone interested in creating interactive objects or environments. Arduino can sense the.... -
An Arduino measuring the rotational speed of a basic computer fan. It was one of a number of YouTube videos I did as I was studying for a Masters in Computer Science. This particular module was an embedded systems programming course, with a bit of.... -
This device just sends data about the state of our office to Twitter (mainly because it`s just slightly more relevant than sending the same information about my house). It does however have potential relevance to more biodiversity themed activities,.... -
Model railway running under computer control using the laptop to send commands over the USB port to the Arduino, which then does PWM to control the speed of the train. There were a few hiccups along the way not least of which the Arduino crashed repeatedly.... -
The boot-cloner is a program compiled and burnt with the Arduino IDE, that copies part of it`s flash memory onto another microcontroller. The bootloader can be written to a new microcontroller by the Arduino, instead of burning the bootloader onto new.... -
This post is based on the work made previously by tomek in wiring LCD displays using 4 bits. The basic idea is to group the 7 pins that are needed to drive the LCD in only 3 using a shift register. This is a cheap alternative to serial LCDs. The schematic.... -
Not drive a solenoid directly from your Arduino. It requires more current than you can provide and produces destructive voltages when it is switched off. There is a simple solution. The solenoid I was testing with is a 12 volt solenoid the size of my thumb..... -
One method of controlling power to ac circuits uses a triac to turn the power on and off at precisely timed intervals that are synchronized with the ac signal. This method is called AC phase control. It is the method used in many light dimmer and heater....
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
The 74AC240 stepper driver works by alternately enabling each half of the buffer. Only one half...
Driving a D/A converter with an A/D converter provides an overall analog-hold function, which...
This project describes how to make a digital voltmeter with a PIC microcontroller. A character...
Clipping is one of the main problems that causes distortion in amplifiers. It causes the...
software on my MacBook Pro - such as the aforementioned Laidman & Katsura `s WaveWindow -...
To provide rapid motor speed changes and motor direction reversal, four outputs drive a MOSFET...
Switch a water solenoid valve using two water level switches, one will be placed at the top of a...
In the project LED Touch Sensing by Jeff Han, I saw a magic happen on a LED matrix. That LED...