Christopher Hawkins made this cool DIY 3d printed stepper motor: [via]
This is a programmable stepper motor and driver that I made out of some nails, magnet wire, neodymium magnets, a digispark microcontroller, and a 3D printed piece that I designed around these things. My goal was to make something about the size of a business card that moved. You can’t exactly fit it in your wallet but it does indeed move. It just a first draft- there’s lots of room for improvement. It has a step angle of 15 degrees (although the way I’m driving it, it is 7.5 degrees.)
3D Printed Stepper Motor - [Link]
We enlarged our stock offer of well-proven LEDs in a PLCC-2 package with new improved types.
KA-3528 series of SMT diodes is not a novelty and many of you may know it already for several years, however this series is being continuously enriched with new types. Kingbright as a reliable producer of LEDs always improves their specification, that´s why we also counterchange our offer with new types which overcome their predecessors. It ensures a long-term availability of LEDs in this package and at the same time it ensures still lower power supply demands thanks to a higher luminous intensity of new types.
KA-3528 are universal colour SMT LEDs in a PLCC-2 package, with higher luminous intensity and 20mA nominal current, suitable for backlighting of push-buttons, panels etc. KA-3528 also offers a possibility to choose from several colors (wave lengths) even within one color group.
The PLCC-2 package has good optical properties (reflector) and good thermal properties at the same time, what gives a supposal of a long lifetime. In the recent period we enriched our offer with for example these types – KA-3528LSGS, KA-3528QBCT-G a KA-3528VGS-A.
Detailed information will provide you the datasheets at particular types as well as overview of Kingbright SMT diodes. In case of interest in any Kingbright component, please contact us at email@example.com.
Universal SMT LEDs series KA-3528 will attract attention – [Link]
A wireless mesh Arduino board with USB, LiPo battery charger, built in range testing and over-the-air programming… cheap enough to leave in your project!
Gregor @ inDevice.ca have developed a low cost wireless Arduino board. It is based on the ATMega128RFA1 and uses Atmel’s wireless mesh stack. It also has a built in V-USB port for the bootoader and serial terminal and is fully compatible with Arduino. Some other unique features weʼve added is built-in range testing and wireless programming. There is a new video up showing two wireless boards working together and accepting commands from a WiFi shield. Right now they have a page up on Indiegogo, check it out.
miniSWARM – Scalable Wireless Arduino Radio Module - [Link]
Steven Keeping writes:
The brushless DC (BLDC) motor is becoming increasingly popular in sectors such as automotive (particularly electric vehicles (EV)), HVAC, white goods and industrial because it does away with the mechanical commutator used in traditional motors, replacing it with an electronic device that improves the reliability and durability of the unit.
An Introduction to Brushless DC Motor Control - [Link]
Researchers at the University of Illinois at Urbana-Champaign and Washington University in St. Louis developed ultrathin, flexible optoelectronic devices – including LEDs the size of individual neurons – that are lighting the way for neuroscientists in the field of optogenetics and beyond.
Optogenetics is the process by which genetically-programmed neurons or other cells can be activated by subjecting them to light. Among other things, the technology helps scientists understand how the brain works, which could in turn lead to new treatments for brain disorders. Presently, fiber optic cables must be wired into the brains of test animals in order to deliver light to the desired regions. That may be about to change, however, as scientists have created tiny LEDs that can be injected into the brain. [via]
Tiny Injectable LEDs Help Neuroscientists Study the Brain - [Link]
It is known, that it is ideal to protect every controlled peripherial separately. DIN Rail-mounted relay interface module Finder Master Plus 39.3x integrates function of a switching and protective element into one component.
Finder Master Plus was in detail described to you in our article Relay interface module with a fuse module. Thanks to a growing interest, we incorporated to our standard stock offer the first type from this series – 39.31.0.024.0060. Despite the fact, that Finder Master Plus series offers more than for example Finder 38.51 series, the price of the new type is even more favorable. In its basic version, the Master Plus module is without a fuse holder (type 093.63, upon order). To deploy the fusing function, all that is necessary is to simply push-in this holder into the module, what connects the fuse in series with the switched circuit.
Condition of the fuse is easily visible through a window. At width of a relay module only 6.2 mm, it is an interface with a separated protection, occupying only a minimum space on the rail. Interconnections in a distribution box can be further simplified and be more transparent thanks to a possibility to use interconnection jumper links. Finder Master Plus 39.3x are available in several versions, EMR or SSR, at the type 39.3x.3 also with a leakage current suppression. Detailed information will provide you the Finder S39 datasheet.
In case of interest, please contact us at firstname.lastname@example.org
Finder Master Plus ensures it – [Link]
by Ashok Bindra:
Whether for driving white LED backlights or powering RF and analog circuits, laptops, tablets and other mobile devices often require voltages that are much higher than the input supply voltage. Consequently, step-up or boost DC/DC converters generate output voltages that are several times the input to serve a variety of circuits and functions in these systems. For instance, in battery powered systems, the input normally is 5 V and below, while voltages as high as 15 and 24 V or more are needed to power RF/analog functions or drive thin-film transistor (TFT) liquid crystal displays (LCDs). Similarly, high voltages also are needed to bias avalanche photodiodes (APDs) found in optical receivers.
Generating High DC Output Voltage from Low Input Supply - [Link]
The Vetinari Clock comes as an easy to solder kit with everything you need to create your own analog clock that ticks randomly, but still keeps accurate time! The kit comes with a small PCB and all required parts, that you will solder. Also included is a medium-sized wall clock, that you will disassemble and modify, and then connect to the completed PCB board.
Vetinari Clock – A clock that ticks randomly, but still keeps accurate time – [Link]
- 9 input channels
- 100 MHz sampling rate
- Direct connection to CAN, RS485 lines (integrated differential receivers), to RS232 or to LIN lines.
- Samples compression and streaming from device to host computer
- Native Windows and Linux support!
- Adjustable input voltage threshold(s)
- And much more…
- >> Learn more about ScanaPLUS now
ScanaPLUS is a robust, versatile and multi-application 9 Channels logic analyzer. It relies on the free ScanaStudio software to capture and analyze logic signals.
This logic analyzer will capture signals at a steady rate of 100 MSPS (Million Samples Per Seconds), whether you’re using 1 or all 9 channels. No compromises.
Thanks to its configurable and fully protected input stage, ScanaPLUS can be directly connected to RS232, to CAN or RS485 differential lines, or to tiny 1.2V logic signals!
ScanaPLUS: 9-Channels – 100MHz Logic Analyzer is finally here for 149€! - [Link]
by Dave Rishavy & Tomas Berghall:
The one piece of gear that’s essential for EMC troubleshooting is a spectrum analyzer. You can buy a decent portable for about $10k or used ones go for $1k to $5k if you don’t mind the 30 to 80 pounds of weight or the initial investment. This article reviews several models that cost under $2,000.
Compare low-cost spectrum analyzers - [Link]