In this post we will build . Firefly hardware wallet It’s an open-source, affordable, air-gapped hardware wallet for Ethereum . you can build at home for around $5 in parts Here is a short video of its final working model. Here are some of its features: Build it yourself for about $5 with an Arduino, a 2.4GHz radio, an OLED display and a few odds and ends. Low Cost: Not connected by wires and cannot send wireless signals, keeping your private key safe from hackers. Air Gapped: Works with any smart phone to prepare and send transactions or sign secure messages. Mobile Friendly: Let’s make one for yourself There are a lot of options and flexibility when building a Firefly. You may design your own case or use one of our . To get started, it is recommend using this . 3D printable cases breadboard version breadboard You can also customize the and add your own interesting features. source code To get started, you will need a handful of parts, which are available from many sources, varying in price, delivery time and quality. Some links are provided below to get the components to build Firefly(I am not affiliated with any of the vendors). In general, Amazon will arrive much quicker, but with a much higher price tag. Items from eBay will often be much cheaper, but ship from China, so may take longer to arrive. For purchasing in large quantities, is by far your best choice, but also the most complicated. Alibaba Parts List Arduino Nano (ATmega328) Amazon.com eBay.com | eBay.com nRF24L01+ Amazon.com | eBay.com 128x64 OLED Display (I2C) Amazon.com | eBay.com Tactile Button (6mm x 6mm x 5mm) Amazon.com | eBay.com Breadboard (830 points) Amazon.com | eBay.com Wire (22 gauge, solid core) Amazon.com | eBay.com you can find code for the IOS app. Here Thanks for reading ;) Learned something? Click the 👏 to say “thanks!” and help others find this article. Hold down the clap button if you liked the content! It helps me gain exposure . Want to learn more? Checkout my previous articles. _Ultimate guide for understanding & starting with ethereum._hackernoon.com 5 resources to get started with ethereum _Experts are suggesting quantum computing may render blockchain obsolete. As the tech giants such as Google and IBM are…_hackernoon.com Quantum Computing: Is it the end of blockchain? _The whole world is going through the blockchain revolution. But wait…is this really what we dreamed of? Present…_medium.com 13 sidechain projects every blockchain developer should know about _The only blockchain which has blocktime of less than a second: 0.5 sec!_hackernoon.com EOS 101: Getting started with EOS, Part 1

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