Phillipe Cantin writes: So you want to two HC-05 modules to automatically connect together, as soon as they’re powered up and with zero code? Well this is your lucky day since this can be done using the AT+BIND command. Let’s do this thing! For this, you will need: 1 Arduino (I’m using UNO) 2 HC-05 […]
Tag Archives: how-to
Using DS1307 and DS3231 real-time clock modules with Arduino
John Boxall over at Tronixstuff has posted a detailed tutorial on how to on how to use DS1307 and DS3231 real-time clock modules with Arduino: There are two main differences between the ICs on the real-time clock modules, which is the accuracy of the time-keeping. The DS1307 used in the first module works very well, however […]
DIY USB-Oscilloscope in a matchbox
ajoyraman posted a tutorial on how to make a DIY USB-matchbox oscilloscope, an instructable here: In order to economize on the cost of an enclosure while still providing an aesthetic unit the Aj_Scope2 is enclosed in a large size cardboard matchbox enclosure. The USB connection to the PC is on one end while the Audio-Jack […]
Mini high voltage power supply
Victor8o5 posted detailed instructions of how to make this high voltage power supply. He writes: WARNING: Before you start making anything please take a moment and read this: This circuit is intended to be used for educational and experimental purposes (electrostatic experiences, franklin bell experiment, plasma generation, gas ionization, electronic igniter, testing of insulating materials…) this […]
Remaking MSR206 RS232 magnetic card reader to USB
An article on modifying MSR-206 magnetic card reader to replace RS232 port with USB by crimier: This was of high urgency, so I’ve had to suspend my usual work activities and concentrate on this project yesterday. MSR-206 is a pretty impressive piece of technology, incomparable to those cheap eBay magnetic card readers. It even includes 24V […]
DIY small bench power supply
newtonn2 posted detailed instructions of how to make this DIY small bench power supply that can adjust with precision current or voltage: After making my Mini Adjustable Power Supply I was very happy with it, but I was missing a more accurate control of the voltage and current. So I decided to make this slightly […]
Classic joystick to USB adaptor
MatthewH wrote this instructables describing how to use an Arduino Leonardo (or similar) card to make your classic console joystick look like a USB keyboard: If you grew up in the early 1980’s and were into video games, you probably had an Atari 2600, ColecoVision, or similar game console. The controllers or joysticks for each […]
Building a Doduino
V-TechDesign published a Doduino build: This project was an exercise in building an Arduino like ATMEGA328P board from scratch using a 3×4 inch Veroboard. The main objective was to provide better build-in I/O capability out of the box, so most projects will not need an I/O shield to perform common tasks. This makes the whole setup […]
Use sublime text 2 to replace Arduino IDE
Kathy Yang over at Elecfreaks writes: We could often feel frustrated when programming using the Arduino IDE. Why? Not because of how many errors we encounter in the program, but it is so difficult to find out the errors in source code, which is really something freaking out. For example Arduino IDE does not seem […]
Adding bluetooth to an EEG headset for mind-controlled projects
An instructables on adding bluetooth to an EEG headset for mind-controlled projects by AndreLe: I had serial bluetooth module HC-06 lying around and decided to see if I could integrate the two and skip the Arduino altogether. Turns out, it works almost as good as the commercially available NeuroSky MyndWave for a quarter of the […]
$2 DIY compost thermometer build
afraser-kruck wrote this instructable detailing his DIY compost thermometer build: Here are some basic instructions on how to build a $2 compost thermometer using readily available supplies. It looks crappy (in a good rustic kind of way), but works great and uses few materials. You really don’t need to read this… I like this design because it’s […]
Guitar booster pedal (MPX-1)
Bastl3r wrote this instructable detailing the build of his guitar booster pedal project: I chose an overdrive pedal design off of generalguitargadets.com (Schematic) and modified it like this: added a simple positive/middle/negative supply added a noise filter I found on beavisaudio.com right after the DC Jack (Huminator) took away the clipping diodes on the output connected […]
Lasercut strip feeder for your pick & place
Do you need a strip feeder for your pick & place? Felix of LowPowerLab shows you how to easily make a DIY strip feeder: So let’s make a strip feeder. I have lots of components that are less than a full reel (exotic resistors, transistors, crystals, caps, mosfets etc). Most of these are 8mm and […]
How to recover a laptop after a failed BIOS update
Viktor describes on his website how he used the Bus Pirate to recover a laptop after a failed BIOS update: Once I had to open the laptop to fix it I decided to take this opportunity to explore the options there are for fixing the broken BIOS and compile my findings in this article. In the process […]
Sniffing I2C traffic with a Bus Pirate
Joshua shows us how he sniff the I2C traffic with the Bus Pirate: As far as wiring and software setup, it’s the exact same from the previous post with the exception of adding on the Bus Pirate connections to the SDA and SCLK pins, along with a ground. Also, I swapped out the Bus Pirate from […]
DIY cardboard laser piano
Here’s a cool DIY cardboard laser piano by ElecFreaks: Hi Guys, today, ElecFreaks will show you a guide how to make a cardboard laser piano by yourself. By this way, I think you do not only could make piano , you can transform a table , a window or a wall to be a Laser Piano or a […]
PyroEDU Online Course: An Introduction to FPGA and CPLD
PyroElectro just started an online course, An Introduction To FPGA And CPLD, through uReddit.com: Here’s a short overview of the course: This course is meant to create a pathway into learning about FPGA and CPLD electronics, for people who are scared of the code, tools and general trickery that usually comes with it. A hands-on approach […]
Program your Arduino with a Android device
Jan Henrik wrote this Instructables demonstrating how to program an Arduino with Android device: in this Instructable I want to show you, how you can program your Arduino with your Android device. It is very simple and cheap. Also it allows us to program our Arduino where ever we want, this is usefull for permanently […]
Turning the Freedom board into a Logic Analyzer
Erich Styger of MCUonEclipse writes: I think the most important tool for a firmware engineer is a Logic Analyzer. I always have one on my desk. Working in different locations, sometimes I forget to carry it with me. And for sure I would need it. To buy another one to compensate my laziness? Or maybe […]
USB oscilloscope with signal generator
Jan Henrik wrote this Instructable detailing the build of his DIY USB oscilloscope with signal generator: In this project I want to show you how to make an easy and cheap USB Oscilloscope. Specifications: Price: 20$ Frequency: 2-20000HZ Resolution: 16 Bit Voltage range: +-7V / with probe +-70V Channels: 2 X-Y Mode Signal generator: Sine, Square, Triangular and Sawtooth […]