Tag Archives: charge

Building a Apple Macbook Powerbank | apple macbook powerbank charger

Iv been looking for a powerbank for my Macbook Pro for years. I managed to find one years ago at the price of $300, too much.

I recently purchased a powerbank from ebay and noticed it has a 15 volt option, considering the Macbook chargers are 16.5 volts it should have enough grunt to charge it.

The only component I ordered was the custom Apple cable. Here is the shopping list.

Ok, lets get started with the project. This project can be completed by a beginner, its not complex at all. You just need to ensure its completed correctly as it may cause damage to your Macbook is connected incorrectly.

So i found a Coaxial power cable in my garage, this is the cable connected to the powerbank. We need to fuse this cable with the custom Apple charge cable.

Once we connect the two, we must ensure we seal them correctly using some shrink seal.

I finished and connected it to my Macbook Air 11″, worked straight away. You must ensure that positive and negative is connected correctly. This is achieved by using a multimetre.

When you have completed the project before connecting to your laptop, using a multimeter compare the created cable with the power adapter. You should achieve readings like this.

If your happy with the results then you can connect it to your laptop, you should see the green light which will then turn to orange indicating that its charging.

Results?

Im really happy with it. I did a test of it charging capabilities. I charged the powerbank 100% and then connected it to my Macbook Air which had 15% charge. It charged it to 48%. Its probably around an extra hour of operation on the Air. Enjoy!

Raspberry Pi – Experiment 3 | Raspberryi pi battery charging uptime experiment

This is the third experiment Im running to build a raspberry pi raspberry_pi_logo-svgsystem which will have the ability to run 24/7.

These first set of experiments are designed so that we can gain an understanding about how batteries can power the raspberry pi and for how long.

I bought a 20AH battery from ebay for around $65AUD, I was not wp-1476456214624.jpgpositive about the outcome because for the previous two experiments.

Boy was I wrong!

After connecting all the components I found myself checking its uptime every few hours, just waiting for it to die off!

Turns out this baby did the trick, it ended up giving the raspberry Pi a total of 4 days uptime. Thats 96 hours, I’m really impressed.

Given the uptime this will give us more than enough power for it to be connected to solar, which will be the next experiment.

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Ill be connect the solar panel and charge controller, and trying to waterproof them as best as I can. Ill post photos when its completed.