Hackaday Prize Entry: A CNC Scribe For Making Circuit Boards

We’re interested in any device that can make a PCB out of a copper-clad board, and this entry for the Hackaday Prize might be the simplest machine for PCB fabrication yet. It’s called the Projecta, and it’s a simple way to turn Eagle and KiCad files into a real circuit board.

For the home PCB fabricator, there are two ways to go about the process of turning a copper clad board into a real circuit board. The first is a CNC machine. Drop a piece of FR4 under a cutter, and you’ll get a circuit board and a lot of fiberglass dust. The Othermill is great for this, but it is a bit pricey for all but the most ambitious weekend warrior.

The second method of home PCB fabrication chemically etches the copper away. The etch resist mask can be laid down with dry film resist, or with the ever-popular laser printer, magazine, and laminator trick. Either way, the result is an acid-proof covering over the copper you don’t want to get rid of.

While the Projecta looks and sounds like a miniature CNC machine, it doesn’t chew through copper and produce a ton of fiberglass dust. The Projecta scribes the pattern of a circuit board after the copper has been masked off with a sharpie, marker, or other ink-based resist. When the board comes out of the Projecta, there’s a perfect pattern of circuits on a board, ready for the etch tank.

This technique of putting a copper clad board into a CNC machine and etching it later is something we haven’t seen before. There’s a good reason for that – if you’re putting a board under a cutter already, you might as well just chew away the copper while you’re at it.

Just because we haven’t seen this technique before doesn’t mean it’s a bad idea. Because the Projecta is only scribing a bit of ink off a board, the CNC mechanism doesn’t need to be that complex. It doesn’t need to throw a spindle around, and the Projecta can be built down to a price rather easily.

The Projecta is on Kickstarter right now, with the Kickstarter non-early bird price of $600. You can check out the video demo of the Projecta in action below.

Continue reading “Hackaday Prize Entry: A CNC Scribe For Making Circuit Boards”

Seeed Studio’s ReSpeaker Speaks All the Voice Recognition Languages

Seeed Studio recently launched its third Kickstarter campaign: ReSpeaker, an open hardware voice interface. After their previous Kickstarted IoT hardware, such as the RePhone, mostly focused on connectivity, the electronics manufacturer from Shenzhen now tackles another highly contested area of IoT: Voice recognition.

The ReSpeaker Core is a capable development board based on Mediatek’s MT7688 WiFi module and runs OpenWrt. Onboard is a WM8960 stereo audio codec with integrated 1W speaker/headphone driver, a microphone, an ATMega32U4 coprocessor, 12 addressable RGB LEDs and 8 touch sensors. There are also two expansion headers with GPIOs, I2S, I2C, analog audio and USB 2.0 and an onboard microSD card slot.

The latter is especially useful to feed the ReSpeaker’s integrated speech recognition engine PocketSphinx with a vocabulary and audio file library, enabling it to respond to keywords and commands even when it’s not hooked up to the internet. Once it’s online, ReSpeaker also supports most of the available cloud based cognitive speech recognition services, such as Microsoft Cognitive Service, Amazon Alexa Voice Service, Google Speech API, Wit.ai and Houndify. It also comes with an SDK and Python API, supports JavaScript, Lua and C/C++, and it looks like the coprocessor features an Arduino-compatible bootloader.

The expansion header accepts shield-like hardware add-ons. Some of them are also available through the campaign. The most important one is the circular, far-field microphone array. Based on 7 XVSM-2000 respeaker_meow2digital microphones, the extension board enhances the device’s hearing with sound localization, beam forming, reverb and noise suppression. A Grove extension board connects the ReSpeaker to the Seeed’s current lineup on ready-to-use sensors, actuators and other peripherals.

Seeed also cooperates with the Meow King Audio Electronic Company to develop a nice tower-shaped enclosure with built-in speaker, 5W amplifier and battery. As a portable speaker, the Meow King Drive Unit (shown on the right) certainly doesn’t knock your socks off, but it practically turns the ReSpeaker into an open source version of the Amazon Echo — including the ability to run offline instead of piping everything you say to Big Brother.

According to Seeed, the freshly baked hardware will ship to backers in November 2016, and they do have a track-record of on-schedule shipped Kickstarter rewards. At the time of writing, some of the Crazy Early Birds are still available for $39. Enjoy the campaign video below and let us know what you think of think hardware in the comments!

New 3D Printer M3D Pro Hits Kickstarter

M3D just launched their second 3D printer on Kickstarter. The M3D Pro offers more professional features than its predecessor, the M3D Micro, which is still one of cheapest 3D printers around. Despite the higher price of $499, the campaign reached its $100,000 funding goal within hours.

Continue reading “New 3D Printer M3D Pro Hits Kickstarter”

Introducing The Teensy 3.5 And 3.6

Paul Stoffregen has built a new Teensy. The latest in the line of very powerful, USB-capable microcontrollers is the Teensy 3.5 and 3.6 development boards. It’s faster, more capable, and bigger putting even more pins on a solderless breadboard.

The first Teensy was one of the first Arduino compatible boards with native USB. The Teensy 2.0 was even better with support for USB keyboards, mice, and MIDI. Even today, the Teensy 2.0 is the de facto board to use if you want to build anything like a USB keyboard. The Teensy 2.0 was followed by the exceptionally powerful Teensy 3.0, the first 32-bit Arduino compatible board, and thanks to Paul’s contributions of a pile of Arduino libraries, doing cool stuff faster has never been easier. Since the launch of the Teensy 3.0, its successors, the 3.1 and 3.2 have launched. If you want the power of an ARM microcontroller with the deepest Arduino library support, there’s only one board you should consider.

Like the launch of the Teensy 3.0, Paul is Kickstarting the launch of the latest Teensys with a crowdfunding campaign. Let’s dig into everything these new boards have to offer.

Continue reading “Introducing The Teensy 3.5 And 3.6”

You May Have a Nixie Tube Clock, but Can Yours Levitate?

Nixie tubes, electromagnets, levitation, and microcontrollers — this project has “Hackaday” written all over it!

Time Flies: Levitating Nixie Clock comes from [Tony Adams], and uses a lot of technology we’ve seen before, but in a new and interesting way. A nixie tube clock is nothing new, but using electromagnets to levitate it above a base certainly paired with inductive coupling to transmit power using no wires make this floating nixie build a real treat.

Continue reading “You May Have a Nixie Tube Clock, but Can Yours Levitate?”

The Onion Omega2: The Latest Router Dev Board

A few years ago, the best way to put a device or project online was by hacking a router. With an inconspicuous Linksys WRT54G held onto a project with baling wire, anything can connect to the Internet. A lot has changed in a few years, and now those routers are development boards themselves. The latest of these is the Onion Omega2, a follow-up crowdfunding campaign to the very popular original Omega. Now, this tiny dev board is faster, more capable, and now it’s giving the Raspberry Pi Zero a run for its money.

The original Onion Omega was released last year with specs you would expect from an Internet of Things development board designed upon a chip for a cheap router. The original Onion used an Atheros AR9331 SOC running at 400 MHZ, had 64MB of RAM and 16MB of storage – enough to run a lightweight Linux distro – and also included USB, 802.11b/g/n, and a handful of GPIOs and a single UART. The Omega2 is a vast improvement over the original Omega, featuring a CPU that is 45% faster. The upgraded version of the Omega sports twice as much RAM, twice as much storage, and a MicroSD slot. This enables some Linux distros with a little more oomph behind them, and of course the SD card allows for local storage.

The original Onion Omega was funded through a crowdfunding campaign, with a single Onion Omega and dock available for a pledge of $19. Taking a lesson from the C.H.I.P. and the Pi Zero, the team at Onion have slashed the price. The Omega2 is only five dollars. If you want more RAM, storage, and an SD card socket, that price goes up to $9 USD. That’s amazing, and just goes to show how far hardware designed to service the Internet of Things has come in just a few short years.

Crowdfunding: A Wireless Oscilloscope

One of the most ingenious developments in test and measuring tools over the last few years is the Mooshimeter. That’s a wireless, two-channel multimeter that can measure voltage and current simultaneously. If you’ve ever wanted to look at the voltage drop and power output on a souped up electrified go-kart, the Mooshimeter is the tool for you.

A cheap, wireless multimeter was only the fevered dream of a madman a decade ago. We didn’t have smartphones with Bluetooth back then, so any remote display would cost much more than the multimeter itself. Now this test and measurement over Bluetooth is bleeding over into the rest of the electronics workbench with the Aeroscope,  a wireless Bluetooth oscilloscope.

[Alexander] and [Jonathan], the devs for the Aeroscope got the idea for this device while debugging a mobile robot. The robot would work on the bench, but in the field the problem would reappear. The idea for a wireless troubleshooting tool was born out of necessity.

The specs for the Aeroscope are about equal to the quite capable ‘My First Oscilloscope’ Rigol DS1052E. Analog bandwidth is 100MHz, sample rate is 500 Msamples/second, and the memory depth is 10k points. Resolution per division is 20mV to 10V, and the Aeroscope “Deluxe Package” that includes a few leads, tip, clip, USB cable, and case is about the same price as the Rigol 1052E. The difference, of course, is that the Aeroscope is a single channel, and wireless. That’s fairly impressive for two guys who aren’t a team of Rigol engineers.

As is the case with all Bluetooth test and measurement devices, the proof is in the app. Right now, the Aeroscope only supports iOS 9 devices, but according to the crowdfunding campaign, Android support is coming. Since the device is Open Source, you can always bang something out in Python if you really need to.

While this is a crowdfunding campaign, it’s hosted on Crowd Supply. Crowd Supply isn’t Indiegogo or Kickstarter; there are people at Crowd Supply vetting projects. The campaign still has a month to go, but the first few pledges are putting the Aeroscope right on track to a successful campaign.