pinomelean @ instructables.com writes:
Numitrons are neat display devices similar to nixie tubes but designed for much lower voltages. Numitrons are basically incandescent displays in which filaments create the segments.
They have a steampunk look that i liked so much. I bought 6x IV-9 russian numitrons in ebay, they were about 3$ each, they’re pretty cheap!
At that time i didn’t know what to do with them, but then i thought about a clock. Using software from a single LED display clock i made this impressive numitron clock.
Single digit numitron clock - [Link]
Paperduino 2.0 with Circuit Scribe – Paper Arduino, on Instructables. [via]
What if making an Arduino, or wiring up an Arduino was as easy as printing one out? In this tutorial we printed our own Arduino Pro Mini board using a pen plotter and the Electroninks Circuit Scribe (a rollerball pen with highly conductive ink). Within 15 minutes we printed the board, placed components down with glue or tape, and uploaded a sketch.
Paperduino 2.0 with Circuit Scribe – Paper Arduino! - [Link]
Ray Wang writes about his project the SquareWear Mini with All-New Chainable Color LED Matrix, and an Interactive Animation Design Tool.
The goal is to make standalone programmable color display gadgets. The LED matrix is chainable and can be seamlessly extended in both X and Y directions. The SquareWear Mini is essentially an Arduino running at 3.3V and 12MHz. It plugs directly to the LED matrix, and has built-in USB port, temperature sensor, light sensor, buzzer, Lithium charger, and 16KB EEPROM. I wrote a software in Processing that communicates with SquareWear with HID Serial, and allows the user to interactively design pixel patterns and even animations with sound. Check the video and my blog post for details.
SquareWear Mini chainable color LED matrix and animation design tool - [Link]
Desoldering braid makes an invaluable service at development or rework.
Everyone who´s ever tried to suck off a solder from a solder pad by means of a solder absorbing braid (wick) will probably confirm, that this tool belongs to a “must have” equipment of every professional or amateur workplace. What´s the charm of a desoldering braid? Above all in the fact, that it´s able to absorb almost all the solder from a given place, thus the most of components can be loosened very easily. Hand (pneumatic) pump surely has its place, mainly when working with bigger components, but at comparison with a desoldering braid it´s similar like if we compared a broom with a vacuum cleaner.
A quality desoldering braid is usually able to absorb a solder so thoroughly, that only a microscopic layer of a solder will remain on a PCB – as if a board was new, unused. It is very advantageous even at a hand rework of SMT components, because it´s desirable the component to lay directly on a board – not askew in a thick solder layer causing a mechanical tension and able to cause even a malfunction of a component (often at SMT capacitors).
To reach a good functionality of a desoldering wick it should be made of a fine gauge copper wires (without oil residues end similar) and it must be treated with a high quality flux. The cheapest braids usually contain only a rosin-based flux, the better ones have a synthetic flux based, which produce less fumes. Read the rest of this entry »
“stevechamberlin” hands-on review of the Rigol DS1074Z oscilloscope
Rigol DS1074Z Oscilloscope Review - [Link]
In a paper published in Nature Communications researchers at IBM describe how they have built a silicon-based receiver chip incorporating GFETs or Graphene Field Effect Transistors (the purple structure in the photo) into the circuit. The multi-stage receiver integrated circuit consists of 3 graphene transistors, 4 inductors, 2 capacitors, and 2 resistors.
“This is the first time that someone has shown graphene devices and circuits to perform modern wireless communication functions comparable to silicon technology,”
said Supratik Guha, Director of Physical Sciences at IBM Research. In a test the team successfully used the graphene-based receiver to process a digital transmission on 4.3GHz. The binary sequence received was 01001001 01000010 01001101, which represents ASCII coding of the letters IBM.
IBM Chip uses Graphene FETs - [Link]
Custom Circuit Boards, LLC. is a quick turnaround PCB prototype manufacturing company located in Phoenix, Arizona with 32 years of experience on the field offering the best quality printed circuit boards from PCB prototypes to production PCBs. They also have the capabilities to provide multilayer PCBs up to 24 layers. As a leading PCB manufacturer, they provide their services to the aerospace and military industry, medical and bio-medical, automotive industry, and even to hobbyists and student’s with only one thing in mind, quality assurance.
“We started Custom Circuit Boards because we were tired of the poor customer service and board quality from other PCB companies in the industry. We knew that we could do better. Now, every day we do ourbest to exceed our customer’s expectations by providing exceptional personal customer service and competitively priced high-quality printed circuit boards that are delivered on time.”
Custom Circuit Boards fabricates all of their PCBs in their USA factory and they are continually investing in better machinery and technology in order to improve their PCB capabilities. The standard prototype PCB lead-time is 10 days, however, depending on the complexity of the boards and quantity, it could be shorter. They also provide 24 hour, 2 day, 3 day, 5 day and 10-day turnaround when needed. Read the rest of this entry »
The world’s first 100MS/s open source oscilloscope for iPad, Android and PC. A must-have for every Arduino and Raspberry Pi developer!
The SmartScope combines 3 high-end instruments into 1 mobile, smart device. Accessible previously only to high-tech labs, the SmartScope allows everyone to own a personal lab!
Starring a dual-channel 100MS/s oscilloscope, the SmartScope is the world’s first lab instrument which works on both PC, laptop, tablet and smartphone. This is a must-have for any maker, and for anybody involved in hardware development!
SmartScope – 100MS/s Open Source Oscilloscope for mobile devices and PC (Kickstarter) - [Link]
I present the new module MOD-20.Z Xmega eXploreGO of Modułowo, with the microcontroller ATXmega128A4U and MP3 decoder VS1003B. The module has an DataFlash memory and a microSD card connector. You can connect a Bluetooth module and a radio module nRF24L01. The module can be programmed via USB or programmed/debugged using the connector PDI, derived on the edge of the platform. All signals from the microcontroller are routed to external connectors. Signals connected to VS1003B and DataFlash have SMD jumper and they can be disconnected at any time, in the case of using signals for other purposes. On the edge of the plate also put a small switch ON / OFF for USB power.
The module has two configuration jumpers for selecting the power supply from the USB connector or the VIN. Xmega eXplore GO has a connector’s compatible with the Arduino platform, enabling connection of Arduino shield’s. Microcontrollers ATXmega tolerate voltage +3.3 V, each signal has a built-in resistor with a value of 3.6 kR, allowing you to connect systems +5 V. In some cases they can interfere, so most of the resistors has a SMD jumper on the opposite side. The module is available in two basic versions: with the block VS1003B (MP3 version) and without. A cheaper version will allow the use of the module as a development platform for microcontroller ATXmega128A4U. Below is a picture showing the contents of Xmega eXploreGO.
more info here: XMEGA EXPLOREGO ENG
Xmega eXploreGO – a new module with ATXMEGA mcu and mp3 support - [Link]