Digispark Pro

by Bart Pelgrims on April 14, 2014

digispark proA cheap ($14) and powerful small Arduino compatible board.

Serial over USB debugging, USB programmable, 14 i/o, SPI, I2C, UART, USB Device Emulation, Mobile Development Ready, Optional BT, BLE, Mesh, and Wi-Fi.

The super small, dirt cheap, always open source, Arduino compatible, USB (and Mobile and Wireless!) development (and production) platform, and follow-up to the original Digispark.

Nice extra: it is compatible with the original Digispark shields.

Source: Kickstarter


Paperduino Tiny

by Bart Pelgrims on April 11, 2014

paperduino tinyPaperduino Tiny is very cheap and easy to build Arduino compatible board with USB and software compatible with Digispark board.

Paperduino Tiny include an ATtiny85 microcontroller and come with USB interface. Coding is similar to Arduino, and it use the familiar Arduino IDE for development.

This Arduino can be build in 1 hour for aprox. 4 USD.

Support for the Arduino IDE 1.0+ (OSX/Win/Linux)
Power via USB or External Source – 5V
Built-in USB (and serial debugging)
6 I/O Pins (2 are used for USB only if your program actively communicates over USB, otherwise you can use all 6 even if you are programming via USB)
8k Flash Memory (about 6k after bootloader)
I2C and SPI (vis USI)
PWM on 3 pins (more possible with Software PWM)
ADC on 4 pins
Power LED and Test/Status LED (on Pin1)

Source : paperduino


Arduino Model Rocket Launcher for 3D Printed Rockets

by Bart Pelgrims on April 9, 2014

rocket launcherWhen he was a kid, he loved playing with Estes Rockets, so he decided to get back into the hobby but using all of his maker skills. So here’s a really cool Arduino Rocket Launcher launching 3D Printed rockets from a MakerBot Rep2.

How it works

  1. When the coast is clear, and your ready to launch, insert the key into the launcher and turn it to the right, the Arduino will boot up and play a sound.
  2. Use the knob to set the countdown – 1second – 2 minutes.
  3. Flip the toggle switch on, the Amber/Yellow should shine indicating the system is armed.
  4. Hit the RED arcade button to start the launch.
  5. When the countdown hits 0, current is sent to the ignitor while the buzzer is on and the rocket will blast off! If it doesn’t blast off during those 8 seconds. Wait about 5 minutes before approaching the launch pad (you probably have a dead engine or the ignitor broke – they are fragile!).


Source: Instructables
Arduino Code on GitHub
Files for 3D Printing on Thingiverse 



Flashlight Following Robot

by Bart Pelgrims on April 2, 2014

flashlight following robotThis project will use three photoresistors (light dependent resistors) and an Arduino to control the motion of a robot. Any common robot chassis can be used for the robot. The light sensors will be mounted on the left side, right side and front of the robot. When light of sufficient intensity falls on a sensor, the robot will respond with a left turn, right turn or forward movement, depending on the location of the sensor that is activated. The instructable will also pass along some electronics tips that I have found useful and, hopefully, will prove useful to others.


Source: instructables


Continue or Stop this website?

by Bart Pelgrims on March 11, 2014

Recently I’ve been contacted by a representative of Arduino. It seems that I cannot call my website arduinopassion.com, as it is a trademark violation and infringes the Arduino copyrights.

Little did I know when I started this website almost 2 years ago. There are literally hundreds (if not more) webistes with arduino in the domain name.

So now I need to make a decision. There are 2 possibilities here:

  1. Stop this website completely
  2. continue, but using another domain name as I cannot use arduino in a domain name

What do you prefer? If you would like this website to continue, please let me know in the comments.

Thank you,



Programming the ATtiny

by Bart Pelgrims on January 14, 2014

attinyThis is a tutorial for programming the ATtiny chip. This tutorial will be more in depth than most. It will give you every step in detail and will tell you the things nobody else told you when first starting programming the ATtiny.

The programing is done with the Arduino IDE, using an Arduino UNO connecting it to the ATtiny.

Source: instructables


Charliecube LED Cube

by Bart Pelgrims on January 14, 2014

charliecubeCharliecube is a 4x4x4 tri-color LED Cube designed and created by Asher Glick and Kevin Baker. But what makes it special? Other cubes use shift registers, decade counters, or other components to control all the LEDs and can cost upwards of $150. The charliecube can be run using only 16 digital pins with no extra components and costs $30 plus an arduino. So besides the LEDs, wire, PCB, and microcontroller, there are no other parts! This innovative solution uses a method of multiplexing know as Charlieplexing to achieve a large number of outputs using a minimal number of pins.

Parts List

  • 64 RGB Leds, diffused, ours were common cathode $0.311 each
  • 1 Large Radioshack PC Grid Proto Board (4.5” x 6.625”) $2.95
  • 40 feet of solid core 20 gauge wire (or similar size) for supporting the spires
  • 10 feet of stranded 22 gauge wire (or similar size) for connecting spires together
  • We like to use old floppy cables we have lying around. One is enough for this.
  • Optional – paint to color the proto board differently. White reflects nicely, and black hides everything.

The big difference with other LED cubes is that here the hardware-wise very simple (a minimal number of partst), but that makes it much more complex to program. However, several functions are provided to simplify the software part.

Source: aglick


arduino on batteryHans found out that a battery would only last for a few days, before it would be gone. Browsing around the internet, he learned about the fantastic work of Jean Claude Wippler of Jeelabs fame. JC has been working on wireless sensors for years and tackled the battery issue way long before he did.

Why will a standard Arduino eat a battery in days?

Arduino separates itself from a bare ATMEGA from the hardware side of things are it’s form factor (allowing for the use of standard shields), standard USB interface, power regulation and some LEDs. Now some of these things that make Arduino hardware great are also killing battery consumption: When you run a standard Arduino (Uno for instance), it already consumes more than 15mA, just sitting there doing nothing. Given that a typical Alkaline 9V block has a capacity of approx 450mAh, this means it drains the battery in just 30 hours or less two days (450mAh/15mA).

There is also part 2, where he explains how to run an Arduino on 4 AA batteries for over a year!

Source : Hardware Startup, part 2


Multiple Raspberry PI 3D Scanner

by Bart Pelgrims on January 13, 2014

raspberry pi 3d scannerThese guys actually built a real 3D people scanner. Using the Raspberry PI and PI camera combination. A “fairly” affordable module, that already is ethernet connected, the triggering of the cameras is done using the network and an easy way to download all the images to a centralized place.

Stuff needed for this project:
- 40 Raspberry Pies for this project and 40 PI cameras.
- 40 8Gb SD cards
- 1 single 60A 5v power supply to power all the raspberry Pies
- Led Strips and a powerful 12v power supply to power them on

After building this awesome setup, he decided to participate in the Dutch maker faire and offered everyone a free 3d photo shoot. It was a very busy but fun 6 hours and they scanned 225 people!


Source: instructables, also more on pi3dscan.com


The Face-Tracking Confectionery Cannon!

by Bart Pelgrims on January 13, 2014

confectionery cannonA team of mechanical and electrical engineering students at Olin College came up with a very fun semester project — a pneumatic powered marshmallow cannon that can track faces, and aim for the mouth!

The device — dubbed the Confectionery Canon — is an impressive mechanical build which required many of Olin College’s manufacturing resources such as the laser cutter, the mill, and the lathe. The majority of the device was made out of acrylic, which was chosen for easy laser cutting, and affordability. Specific aluminum pieces provide strength and were made using mostly scrap found in the shop.

The premise is simple: take a tube of plastic and make a 30 PSI marshmellow cannon, then put it on a rotating rig, load it up with facial recognition software, and tell it to aim for the mouth. Four servos, a webcam, a solenoid and an Arduino Uno are used to build this system.


Source: confectionerycannon via hackaday