Category: Arduino

First impressions of mbed.org

I just tried mbed.org and I liked it 🙂 mbed is a development framework for ARM microcontrollers (well it looks like Arduino for ARM to me), officially supported by ARM. Mbed.org also has online IDE and compiler. The simplicity of

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CdS photocells and their characterisation

CdS photoresistors (also called photocells sometimes) are an inexpensive type of light sensors. They find their use in light detecting sensors (daylight switches, light meters) and also in some music equipment (eg. noiseless faders and also some guitar effects). Due

Posted in Arduino, Electronics, Mechanical engineering, Photovoltaics

How to update NEO M8N firmware

If you are using a NEO M8N GPS module you might consider updating the firmware to get more sattelite constellations available. Of coure everything you do on your own risk – here is just a writeup of what worked for

Posted in Arduino, Electronics, Radio communications, Software, Telemetry Tagged with: , , , ,

Measuring Nikon DSLR IR remote signal

I just got a Nikon ML-3 equivalent IR remote for remote controlling my Nikon D3300 camera. I recently also wrote the Arduino Nikon IR remote sketch and I figured why not do some reverse engineering on the “original” remote. I

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Another Arduino Nikon IR Remote

I am a proud new owner of a Nikon D3300 camera and yesterday while browsing the hackaday prize entries I found this project. It’s a pretty neat IR remote for a Nikon camera. And I even have some of those

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Simplest battery / power indicator circuit

So we usually want to have a battery indicator circuit in many of our devices. The indicator warns us if we have left the device powered and also indicates if the device battery is reaching its end of life. The

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Replacing potentiometer with up-down buttons on arduino

Sometimes you want an arduino application to be controlled either by a potentiometer (eg. joystick) or by a keypad. Here is a simple resistor circuit that uses two keys and mimicks a potentiometer in three different states – middle position,

Posted in Arduino, CNC, Electronics Tagged with: , , , , , , ,

Arduino capacitive sensor and the friction drum

I recently cut out a capacitive sensor on my old CNC machine for a friend working at the university. They plan to connect the sensor to Raspberry PI and try to make a virtual friction drum. The sensor is pretty

Posted in Arduino, Audio equipment and Music, CNC, Electronics, Software Tagged with: , , , , ,

Cheap ebay boost module comparison and performances – 5V from one or two batteries

You ever wanted to supply the 5V voltage to your arduino / electronics project, but didn’t have enough space for 4 or even 6 batteries that are needed to get the correct input voltage? With those cheap (USD 1-2) ebay

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Testing digital altimeter for project Rocket 404

During elementary and high school I was quite into model rocketry, building and launching a number of model rockets. Most of them were bulit around commercially available rocket motors. At that time some of my colleagues were building their own

Posted in Arduino, Electronics, Model rocketry, ReiLabs Legacy Posts Tagged with: , , , , , , , , , , ,
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