What do you do when you come across a cheap electric bicycle on Facebook Marketplace from a seller who has a few hundred of the same ones available? If you’re someone like [Max Helmetag], you figure that it’s probably legit since nobody would be reselling hundreds of Lime ridesharing e-bikes. Thus, it makes for an excellent project to see how usable an old ridesharing bicycle is. According to the information on the e-bike’s frame, it was manufactured in 2017, and based on the plastic still covering parts of the bike, it had barely been used, if at all.
There’s a problem with software defined radio. It’s not that everyone needs to re-learn what TEMPEST shielding is, and it’s not that Bluetooth is horribly broken. SDR’s biggest problem is one of bandwidth and processing. With a simple USB TV Tuner, you can listen in on aircraft, grab Landsat images from hundreds of miles up, or sniff the low-power radios used in Internet of Things things. What you can’t do is make your own WiFi adapter, and you can’t create your own LTE wireless network. This is simply a problem of getting bits from the air to a computer for processing.
At HOPE last weekend, the folks behind the very capable LimeSDR and a new company working with Lime’s hardware laid out the possibilities of what software defined radio can do if you make a link to a computer very fast, and add some processing on the SDR itself.
Plovdiv, Bulgaria has a long history of design and innovation going back at least 6000 years to cultures like the Thracians, Celts, and Romans. In the last decade it is also an important center for open hardware innovation — reviving the lost glory of the computer hardware industry from the former “Soviet bloc countries”. One of the companies in the region that has thrived is a 5000 square-meter microelectronics factory which you may have heard of before: Olimex.
Olimex has over 25 years of experience in designing, prototyping, and manufacturing printed circuit boards, components, and complete electronic products. Over the last decade it has evolved into a shining example of an open hardware company. We recently had the chance to visited Olimex and to meet its CEO, Tsvetan Usunov.