Make JPEG Droplet Is the Fastest Way to Convert Files to JPEGs

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Convert Pandora Stations to Spotify Playlists with a Chrome Extension

Chrome: If you're a frequent Pandora user who also likes Spotify, you know that it kind of stinks you can't get the two services working together. Pandora to Spotify Playlist Converter is an extension that makes this more possible by bringing your Pandora likes and radio stations into Spotify.

Pandora to Spotify Playlist Convertor works in a few different places in Pandora. With the extension installed, just head over to your Pandora page, and select either an artist radio station or your likes. Then Click the Pandora to Spotify button, and the extension builds a playlist for you. Copy the link and enter it in Spotify. Whether you're bouncing around between different stations or you just want a collection of all the tracks you've liked on Pandora, this extension does the job.

Pandora to Spotify Playlist Converter | Chrome Web Store via MakeUseOf

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Convert Battery Powered Electronics to Use an AC Adapter

We're in a day in age where battery powered electronics are just an annoyance to most of us. Charging, or even plug-in power is so much easier to use. Instructables user DIYHacksAndHowTos shows off how to convert those battery powered electronics to run on AC.

Although the process sounds pretty complicated, it's not as difficult as you might think. It uses a voltage regulator circuit, , a switch, and a dummy battery system to take up space. The dummy battery also makes the whole thing removable in case you want to revert back to the batteries. As with any project where you're working with electricity, you'll want to be careful, but the process here is pretty straight-forward. Head over to Instructables for the full guide.

Convert Battery Powered Electronics to Run on AC | Instructables via Hack a Day

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How to Convert a Kid's T-Shirt into a Backpack

I made this cute little backpack out of a boys long-sleeved shirt that was being thrown out by another mother nearby.  I was offered a lot of her clothes when her son had grown out of them.  Somehow, I didn't imagine my son wearing this as a shirt, but I envisioned it being a much cuter little backpack.
I should have taken a before picture, but didn't think about taking pictures of the process until I had already started cutting.  In any case, it should be relatively clear.

What you will need:
-Long-sleeved t-shirt
-Thread 
-Scissors
-Sewing Machine.  (Although, I guess you could hand sew it, but it would be a bit tedious.)
-Safety pin or paper clip
-pencil or bamboo skewer

Like I said, I didn't think to get a picture until I had already made these cuts, but I made a drawing to show exactly where I cut.  
The red lines on the drawing are my cut lines, and the yellow pieces are the ones that I saved for making the backpack.  
You can see that I cut the sleeves into strips.  They will be used for making the straps.  

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Convert Battery Powered Electronics to Run on AC

It is very rare to find a power supply that will perfectly match an electrical appliance unless they are sold together as a pair. So we are going to have to modify our power adapter to match the circuit that we want to power. The easiest way to do this is to use a variable voltage regulator such as a LM317. The typical configuration for this kind of circuit is shown in the picture above. This regulator uses two resistors to set the output according to the formula: Vout=1.25*(1+R2/R1).

For most applications this circuit can be simplified a little bit. The capacitors are only needed if your load circuit is sensitive to small power fluctuations. So in many cases, these can be eliminated. The variable resistor R2 is useful if you want to be able to power multiple different devices. But if you are going to use the power supply exclusively on one device you can replace it with a fixed value resistor. Wire the circuit as shown with Vin connected to the power supply and Vout connected to the circuit that you want to power. The regulator will bring down the output of the power supply down to the value that you set.

Depending on the power rating of your circuit, you may need to add a heat sink. 

Example:
My son's swing normally runs on four C size batteries. So I found an old power supply with a 9V 1000mA output. I figured that would be enough to replace the battery pack. Then I soldered together the LM317 regulator circuit with a 220 ohm resistor for R1 and a 820 ohm resistor for R2. These resistor values give an output voltage of 5.9V. (It would have been ideal to use a 240 ohm for R1 and a 910 ohm for R2 but I didn't have those values on hand) This output is still well within the operating range for a four cell battery pack. Anything between 1.25V and 1.5V per battery will usually work. Since the electronics on the swing just consists of a motor and a speed controller, I decided that the filtering capacitors weren't unnecessary and I left them off. See the following steps for the best methods for connecting everything together. 

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