Monthly Archives: June 2014

The Bluetooth iPod Controller For Android

Not bad! Should I get a broken iPod, this will definitely be the first project to do =)



By now, just about everyone in the industrialized world has a broken iPod with a cracked screen, a battery that won’t charge, or one that’s simply sitting in a drawer somewhere. The iPod is still a great way to store music, though, and [Trevor] came up with a way to control its playback with an Android device, showing the song name, playlists, and everything else with an Arduino and a cheap Bluetooth adapter

With the right resistance on a specific pin on the 30-pin dock connector, iPods will send the track name, and playlists over a serial connection, as well as respond to play, pause, skip, and volume commands. There hasn’t been much work towards implementing the copious amount of documentation of this iPod accessory mode in small microcontroller projects, but with a little bit of work, [Trevor] managed to replicate the usual iPod dock commands with an Arduino.


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What I use for making GIFs in tutorials – small yet powerful collection of free tools as a starters kit

I’ve recently got a job making tutorials, and it seems that I’ve already found a set of free tools that help. I’ll be updating this post, should my opinion change =)

Soooo… I’ve had a task of making GIF depicting a process in Eagle CAD. I need free tools, being a poor student who, however, doesn’t want to crack software just because it’s the first thing I’ve found. Also, I use Windows XP, so, for example, Snipping Tool isn’t available to me.

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EAGLE Library – List of most commonly used electronics components

Nice collection! Also, pin headers are available in “pinhead.lbr”. Either way, I guess I will make my own blog post about this.

Electronics - Tutorials, Tips and more ...

12 Nov 2009 – Post Updated

EAGLE is preferred by many hobbyists and professionals all over the world. EAGLE comes with huge component library, however to find the desired part in this library is really difficult for beginners. Generally we need resistors, capacitors, voltage regulators, pin headers, connectors, etc when designing any electronic PCB. Following is the list of EAGLE library part names of most commonly used electronics components. This list will be very handy when you have just started using the EAGLE and don’t know which part to select and from which library.

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DS1307 real-time clock PCB (SOIC)

I’m back to writing posts! And expect a long post about my Raspberry Pi wearable PC soon =)

Here I present you a tiny I2C RTC powered by DS1307.


  • 5V power
  • Possibility to connect 3V battery to save clock value while power is off
  • Small enough – 3,5×2,5cm
  • All parts are easy to find

IMG_0464 IMG_0466

Here’s the PCB image I made using EagleCAD. It uses:

  • CR2032 holder – can be easily salvaged from an old dead motherboard
  • 32,768KHz quartz resonator – same, usually found on old motherboards
  • 3x 10K SMD resistors – could either be bought or salvaged like two previous parts
  • DS1307Z in SO-8 packaging


This PCB indeed is tiny. The biggest part of it seems to be the battery holder, and I chose this type of holder/battery combination because both of them are easy to find. Also, you can hook up your own battery – there’s a pin for this on the pin header, thus, big holder is not necessary if you’re not using it =) I made this PCB just because I couldn’t find anything like this on the Net. Now it’s your, too, so you just need to print image below on a sheet of A4 paper using 600 dpi and you’ll have it 1:1. Hint: use GIMP for printing images with certain DPI. Should there be questions, I’ll post a guide for doing this =)

Hope this helps you in your numerous electronics projects.

 Just FYI again – it’s 5V. Yes, it will burn the Raspberry Pi unless you use a logic level voltage converter suitable for I2C communications. Later I’ll probably tell you about making one 😉

I’d really like to provide Eagle files, but the truth is – I lost them somewhere. I might have a backup somewhere, though =( As soon as I find it, I’ll put all the files here.