In the second article about his Nixie tube clock Luca shows how to drive Nixie tubes with a microcontroller. The first article covered the power supply, we covered it here. Nixie tubes are started with a high initial voltage Vigh, around 150-180volts. Once ignited they work at a maintaining voltage Vm, and consume a average […]
Tag Archives: Arduino
Digital clock from an old nixie tube multimeter
James built a digital clock that displays the hours and minutes on an old Nixie tube multimeter. The multimeter functions as a voltmeter that is reading the output of an Arduino generated voltage. There are still some noise issues to clear up, but all in all it’s a cool looking clock. Check out the video […]
Current sensing with the Arduino
Luca made an Amp-meter using the ACS712 current sensor, and the Arduino. The ACS712 is a fully integrated, hall effect based, linear current sensor. It converts the current that passes through its input pins to a proportional voltage on an output pin. He connected the output pin to an analog pin of his Arduino, and […]
The human side of Arduino
Carlos made a mosaic picture of the Arduino board from faces of the Arduino Playground group on LinkedIn. The mosaic is made from 190 individual profile pictures. A zoom-out video of the mosaic is featured below. Via the contact form.
Talking Halloween skull with Arduino
Boris built an open source Halloween project, check out the talking skull in action below the break. In this project the skull speaks and moves the mandible according to the sound level. An Arduino analyzes the level sound of a audio source and drives a servo motor connected to the mandible. All very simple. Via […]
Arduino solar radio
Simon built a solar powered Arduino FM receiver. Using a solar panel to charge the batteries, this Arduino controlled device can work without the need to recharge. A SI4073 FM tuner ICs output is connected to a TDA7051 integrated amplifier, while the Arudino controls the channel selection of the FM tuner. There is a multi-position switch used […]
Chronoduino board v0.3
The Chronoduino uses an Atmega168PA microprocessor. On the peripheral side there is a DS1337 RTC, a BMP085 barometric/temperature sensor, and a MCP73831 Li-Po battery charging IC. Numerous headers as well as two buttons, LED, and a buzzer are on the board. The idea behind the project is to design an Arduino watch platform (hence, quite unimaginatively – Chronoduino) that’s also […]
Bus Pirate: JTAG XSVF player successfully programs Amani64 CPLD
Cliff bought an Amani64 CPLD shield for the Arduino, he had no way to program it except: I did have a Bus Pirate on hand, the ‘Swiss Army Knife’ of digital hobbyists. He successfully uploaded the LED blinking firmware onto the Amani64 with the Bus Pirate JTAG XSVF player. Now he is free to develop his CPLD skills. Get your […]
Key less entry system using Ping))) and the Arduino
Mouser built a key-less entry system using Ping))) and the Arduino. The Ping))) ultrasonic sensor is used to gauge user’s hand positions. By moving the hand at different positions, a code is entered that opens the door. He used the moving average filter to keep the system from taking measurements while the hand was in motion. Source code, schematic diagram, as […]
AM sofware radio using Arduino
Markus built a software AM radio transmitter using the Arduino. The audio signal is fed to the ADC input through a decoupling capacitor. A PWM output pin directly drives a capacitor inductor circuit with an antenna. The schematic and firmware are available.
Arduino MIDI foot controler
Bharat shared his USB MIDI foot controller. This design is basically an extension board for the Arduino that has a bunch of buttons and switches that control instruments and sound effects on a PC using an app like Guitar Rig. There are 3 switches to control the stomp box and 2 additional switches to scroll through sound patches. […]
SSD1308 OLED interface AVR library for Arduino/Teensy
Our forum regular Marcus posted a SSD1308 OLED interface library and pin connections to get you started with your Arduino/Teensy OLED projects. The display is a 0.96” 128 x 64 dot matrix that can be interfaced though both I2C or SPI interfaces, the library Marcus provides is SPI only and should allow you to get […]
Maker vs Maker
David Cuartielles from the Arduino crew takes a picture of the Thermal Tweeter. We were so excited we snapped this picture.
The Resistor JelTone: an edible toy piano
A group from NYC Resistor (Ranjit Bhatnagar, Astrida Valigorsky, Mimi Hui and Catarina Mota) made an edible toy piano, called The Resistor JelTone, for the Jello Mold Competition. As part of our experiments we realized that jello and fruit, which contain a lot of water, are conductive. Embedded in each jello/fruit key is a sterling silver pin (food safe) connected to […]
Real-time energy monitor with Arduino and LabVIEW
Real-time energy monitor with Arduino and LabVIEW: Arduino board that detects the led pulses and sends the data via the XBee module, and a PC that recive the data through a USB/Xbee module and processes the data with LabVIEW so you can prepare and study the consumption in a very instant. Arduino sends two datas […]
Editorial: Our friend Microchip and open source
Microchip jumped into open source last spring with the chipKIT Arduino-compatible development boards and open compiler/IDE. They wanted to tap the existing tutorials, enthusiasm, and customer base of Arduino community, and they were going to play nice with open source. A review of the chipKIT situation today is disappointing. The compiler still replies on closed […]
Chronoduino expandable Arduino watch update
orcinus posted an update on his Chronoduino expandable Arduino watch. Via the project log forum.
Arduino goes open development
Arduino Labs is a new open development playground for the Arduino. Open development is when in-progress source code, design files, and documentation are available to anyone. It’s the norm in open source software, where design is almost always public and collaborative. Open hardware shops usually like to keep new stuff under wraps until it’s “ready” […]
Rosserial library for Arduino released
Michael Ferguson and Adam Stambler have released the rosserial library for Arduino. This is a new library for connecting the Arduino platform to ROS, allowing an Arduino to directly publish and subscribe to ROS messages. There are also demos ranging from controlling servos to using an Arduino and rxplot as an oscilloscope to reading temperature […]
Chronoduino an expandable Arduino watch
orcinus posted pictures of the Chronoduino expandable Arduino watch in the project log forum: So i’ve set out to design the ultimate Arduino watch platform that’s also usable as an ultra-miniature sensor node and dubbed it (quite unimaginatively) – Chronoduino. Some parts are based off of Bazile Romaine’s rev 3 MakerBot Watch, some are completely […]