MIT Media Lab’s Month In Shenzhen

January 30, 2013 by 8 Comments

When you’ve got a month worth of blog postings it’s pretty difficult to choose one photograph that sums it all up. This one shows the tour group from MIT Media Lab in ESD garb ready for their tour of Okano SMT and Speaker Factory. It was part of a tour of Shenzhen aimed at bringing graduate students up to speed on what it means to manufacture products in the city. Luckily, Freaklabs member [Akiba] was one of the staff members of the program and blogged extensively about the experience. At first glance his page full of post abstracts looks really boring, but click through because both his recount and the commented images associated with each day are fun and fascinating ways to tag along with the group.

If you’re really good with faces you can pick [Bunnie Huang] out of the lineup above (he’s the third from the right). He had the original idea for the program and brought aboard a few others to help make the thing a success. The group toured a wide range of factories and parts markets in the city. This included your traditional electronics manufacturing venues but there was even a side trip to a diaper and feminine napkin plant to see the non-electronic factories in operation. In addition to tours there were lectures by industry members like HAXLR8R, a group that specializes in helping start-ups navigate the manufacturing jungle.

[ch00ftech] Visits A Shenzhen Market

September 17, 2012 by 33 Comments

On a business trip, [ch00ftech] visited a Shenzhen electronics market and documented the trip. Some of the attractions included multiple Apple stores of questionable authenticity, stores selling PC components with no manuals, drivers, or packaging, and a variety of LEDs and lasers.

[ch00ftech] showed off the loot from the trip, including breadboards, perf boards, LED matrices, and an RFID reader all for very low prices. There’s also the Class 4 laser pointer that cost about $120 and has a power output of “between 500 mW and 8000 mW.” Given the 500 mW power restriction on lasers sold in the US, it’s fair to say that this thing should be handled with care. Hopefully the included safety classes actually block the specific wavelength of the laser.

The staff in these stores were very knowledgeable and knew part numbers and inventories by memory. One of the biggest surprises was just how low the prices were.  While Radio Shack has started to carry some more parts for hackers, it seems that nothing stateside can compare these Chinese electronics markets.

Getting Your Stuff Built: How To Shop, Conduct Business, Stay Alive, And Eat Your Way Through Shenzhen

June 7, 2012 by 29 Comments

This is [Bob Baddeley]. He’s an EE with an idea that started as a fun project until someone said “hey, that’s cool”. He started thinking about what it would take to launch it commercially and before he knew it he was involved in a startup accelerator to help him assemble what he needs to make his idea into a business. He spent several weeks in China learning about manufacturing and posted copiously about it.

We’ve seen other engineering trips to Asia, but [Bob’s] experience living there provides a different perspective than a quick trip would. He posted about the thing’s you’d expect, like touring a short-run prototyping facility. But he also talks about the rigors of being a pedestrian in a place where legged transport is marginalized by the gas and pedal powered vehicles that are crammed into every square-inch of the city. In the image above he’s walking on the highway (for some inexplicable reason; deathwish?).

He also got to do a lot of fun stuff. He met a ton of folks, like [Bunnie Huang], [Ian Lesnet], and the team over at Seeed Studios. He even took his protoype to the local Maker Faire. It’s a scoreboard which can be controlled from your smart phone. [Bob] tells us that he didn’t get much interest showing the face of the device as seen in that post. But when he turned it around to show off the point-to-point wire porn he was mobbed by interested hackers. Guts!

Nokia Schematics Via Shenzhen

July 26, 2009 by 26 Comments

nokia

The silicon hacker behind the Chumby, [bunnie huang], was browsing through the Mobile Phone Megamarket in Shenzhen, China and stumbled upon an unusual repair book. It turns out the book had the schematics to hundreds of Nokia phones. It’s hard to tell if they are legitimate, but the amount of information makes them seem so. [bunnie] claims that the book is a learning experience because it shows how some sub-circuits are implemented. Also, it can be a good reference for sourcing parts. Since Nokia buys millions of each component, the supply of parts they use are stable. There are also editions for other brands, such as Motorola and Samsung.

Supercon 2024: Quick High-Feature Boards With The Circuit Graver

April 4, 2025 by 11 Comments

These days, if you want to build something with modern chips and components, you probably want a custom PCB. It lets you build a neat and compact project that has a certain level of tidiness and robustness that you can’t get with a breadboard or protoboard. The only problem is that ordering PCBs takes time, and it’s easy to grow tired of shipping delays when you don’t live in the shadow of the Shenzhen board houses.

[Zach Fredin] doesn’t suffer this problem, himself. He’s whipping up high-feature PCBs at home with speed and efficiency that any maker would envy. At the 2024 Hackaday Supercon, he was kind enough to give a talk to explain the great engineering value provided by the Circuit Graver.

Continue reading “Supercon 2024: Quick High-Feature Boards With The Circuit Graver” →

Supercon 2024: A New World Of Full-Color PCBs

March 26, 2025 by 12 Comments

Printed circuit boards were once so simple. One or two layers of copper etched on a rectangular fiberglass substrate, with a few holes drilled in key locations so components could be soldered into place. They were functional objects, nothing more—built only for the sake of the circuit itself.

Fast forward to today, and so much has changed. Boards sprout so many layers, often more than 10, and all kinds of fancy geometric features for purposes both practical and pretty. But what catches they eye more than that, other than rich, saturated color? [Joseph Long] came to the 2024 Hackaday Supercon to educate us on the new world of full color PCBs.

Continue reading “Supercon 2024: A New World Of Full-Color PCBs” →

Investigating USB-to-Ethernet Dongles With “Malware” Claims

January 18, 2025 by 55 Comments

Recently a video surfaced from someone claiming that certain USB-to-Ethernet dongles contained ‘malware’ among other big claims. Basically these dongles were said to be designed by China (and Russia) to spy on users and so on, but how much of this is actually grounded in reality? When [lcamtuf] dove into the topic, what he found was not so much a smoking gun, but rather a curious relic from the era when drivers-on-CD were being phased out.

The item that the video went bananas about was namely an additional SPI Flash chip on the PCB alongside the USB 2.0 – Ethernet IC, with many conspiracy theories being floated as to what it would be used for. After some digging, [lcamtuf] found that the IC used in these dongles (SR9900) is by a company called CoreChips Shenzhen, with a strong suggestions that it is a clone of the (2013-era) Realtek RTL8152B.

Both chips have an external SPI Flash option, which is used with the USB side to present a ‘virtual CD drive’ to the user when the dongle is plugged in. This was borne out with the SR9900 Windows system mass production tool that [lcamtuf] obtained a copy of. Included with the flashing tool is a 168 kB ISO image (containing the SR9900 driver package) which happily fits on the 512 kB Flash chip.

Although it’s always possible for chips and firmware to contain backdoors and malware, in this particular case it would appear to be that it’s merely a cruel reminder that 2013 is now already vanishing into the realm of ‘retro computing’ as us old fogies cling to our driver installation floppies and CDs.