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by TSJWang @ instructables.com:
OK so there’s no such thing as the Apple Clock.
However, you can make your own retro-style bubble display clock in an Apple earbuds case.I’m going to show you how to do that just sit tight.
DIY Apple Clock – [Link]
650V, 100A GaN transistors on show
by Graham Prophet @ edn-europe.com:
GaN Systems (Ottawa, Canada) is to display its GS66540C 650V 100A high current GaN power transistors for the first time at the 17th Conference on Power Electronics and Applications, EPE’15 – ECCE Europe (CERN, Geneva, September 8th – 10th )
The GS66540C (the picture is of a prior, lower-current part) high current power devices will be revealed for the first time. Part of the company’s family of 650V gallium nitride power transistors based on its proprietary Island Technology, these high density devices achieve extremely efficient power conversion with fast switching rates of >100V/nsec and ultra-low thermal losses. The GS66540C is supplied in an evolved form of GaNPX packaging specially developed for higher operating currents, providing lower inductance and greater surface mount mechanical robustness required by power modules for the industrial and automotive markets. The near-chipscale parts have no wirebonds and offer step-change improvements in switching and conduction performance over traditional silicon MOSFETs and IGBTs. Parts are, the company says, being designed in to solar, industrial and automotive applications as global manufacturers race to use the power of GaN to secure competitive advantage.
650V, 100A GaN transistors on show – [Link]
Würth Elektronik – a huge range of inductive components
Würth Elektronik is one of the largest European manufacturers of passive and electromechanical components. The range is really wide, judge for yourself.
Let us mention at least two types from a wide range:
- WE-PD – is a popular “standard” series of SMD inductors. Also available with white coating in the sizes 7332 (7,3×7,3×3,2mm), 7345, 1260 and 1280 for use in applications with LED.
- WE-HCI – series is designed for high current switching regulators. Standard operating temperature range is -40 °C to +125°C, for some types up to +155°C. The inductors are wound by a flat wire.
This allows optimal use of space inside the core and thus achieves extremely low DC resistance of the winding while reducing winding losses caused by the skin effect.
As an example 744355122 type features saturation current 65A, winding DC resistance 0,35mOhm and operating temperature range -40 °C to +155°C.
In addition to the power coils we have included to our portfolio also RF inductors, dual coil power inductors, common mode chokes, ferrite beads, ferrites for cable assembly, transformers for SMPS and coils for wireless power chargers.
We have extended our offer of power coils by 23 SMD series and 4 TH series. Series
- SMD, shielded – WE-PD, WE-PD HV, WE-PDA, WE-HCI, WE-PMI, WE-TPC, WE-MAPI, WE-HCC, WE-SPC, WE-PDF, WE-PD2SR, WE-PD3, WE-MAIA, WE-HCF, WE-HCM, WE-LHMI, WE-PDW
- SMD, non-shielded – WE-PD4, WE-PD2, WE-LQ, WE-LQS, WE-PD2A, WE-PD2 HV
- TH, shielded – WE-TIS
- TH, non-shielded – WE-TI, WE-SI, WE-TI HV
Würth Elektronik – a huge range of inductive components – [Link]
4×1 WiFi Wireless Antenna Switch
Horacio Bouzas published a 4 way WiFi antenna switch:
I started playing with electronics back when I was 10 years old in Argentina, where I grew up. Then I got my ham radio operator license when I was 16 years old and I was very active in the ham club and on the air. It was then when I built my first vacuum tube transmitter and refurbished and old receiver (also vacuum tubes) that somebody from the club was throwing away. My interest for science and electronics grew and I ended studying physics but always tinkered with electronics, whenever I could.
I’ve moved a lot around the world for work (oil and gas) so my dedication to ham radio pretty much faded away. But it came back! Just recently, I got my ham radio operator license back and started to get active on 2mtr and on digital.
Due to lack of space outdoors, I had to settle for installing my center fed dipole on the attic (I have a long attic), but I quickly realized I needed more than 1 antenna. 80 mtr, 40 mtr, 20mtr….
And I didn’t want to run multiple lines to the attic, so an antenna switch was necessary.
4×1 WiFi Wireless Antenna Switch – [Link]
Digital Hearing Aid using MKL02Z16VFG4
A hearing aid is a small electronic device worn in or behind the ear that amplifies incoming sounds to help people with hearing impairment. This design features a light and compact hearing aid with a soft touch sensor that allows the user to control the volume and frequency depending on the user’s preference.
This design uses MKL02Z16VFG4, an energy and size efficient microcontroller that serves as the main component of the system. It receives the signals from the sensor and microphone, and then sends the processed signal to the speaker. The system uses two amplifiers, a class AB preamplifier and a class D amplifier, both in small packages as it is desirable for the device. It is also equipped with a sensor using Si1102-A-GM that enables the user to change the volume and frequency with a simple touch. Other components can be added, such as a Bluetooth remote control.
This design is applicable for hearing aids and other sound amplification needs. Its lightweight feature makes it portable for daily usage.
Digital Hearing Aid using MKL02Z16VFG4 – [Link]
Colour Injector lamp
by Taras Sgibnev:
The colour of light emitted by this lamp can be controlled using syringes filled with red, green and blue ink. Russian designer Taras Sgibnev developed the interactive product as a physical expression of the way red, green and blue light are used in digital interfaces to create a full spectrum of different hues.
Colour Injector lamp – [Link]
Damp-Pi – Room Moisture Extraction with Raspberry Pi
by davidhunt.ie :
Over the last while I’ve been having a problem with excess humidity in the shower rooms. Imagine that, the builder never put in extractor fans when the house was built! Anyway, I could put in those fancy extractor fans with the built in timers or humidity sensors, but I decided to do things the more interesting way, by using a small computer to read the values from a humidity sensor in each room, and based on the readings, turn on the fan until the humidity was reduced to an acceptable level.
I happened to have several spare Raspberry Pi’s lying around, so that’s what I used for this project. But there’s nothing stopping you using an Intel Edison, Intel Galileo, Creater CI20, Beagleone Black, Beaglebone green, etc. Use whatever you’re comfortable with.
Damp-Pi – Room Moisture Extraction with Raspberry Pi – [Link]
Arduino Email Sender with Ethernet adapter/shield
by Matej Blagšič @ instructables.com:
My father asked me to do a little project with Arduino that would send an e-mail when a push button is pressed or anything, can be based on temperature reading, so make sure you watch my previous instructable on that or to send that something has closed up on the distance sensor. Be sure to watch those tutorials on my profile.
Arduino Email Sender with Ethernet adapter/shield – [Link]
EEVblog #790 – Lecroy Wavejet 354 Touch Oscilloscope Teardown
Take a look inside the 500MHz 4 channel Teledyne Lecroy WaveJet Touch 354 oscilloscope.
EEVblog #790 – Lecroy Wavejet 354 Touch Oscilloscope Teardown – [Link]
100V, 1A, synchronous step-down regulator: Iq of 7µA
by Graham Prophet @ edn-europe.com:
LT8631 is a 1A, 100V-input-capable synchronous step-down switching regulator. Synchronous rectification delivers efficiency as high as 90% while Burst Mode operation keeps quiescent current under 7µA in no-load standby conditions.
Its 3V to 100V input voltage range suits it for 48V automotive systems, dual battery transportation, industrial and 36V to 72V telecom applications. Its internal high efficiency switches deliver up to 1A of continuous output current to voltages as low as 0.8V. The LT8631’s Burst Mode operation offers ultralow quiescent current, suiting it for applications such as automotive “always-on” systems. The LT8631’s unique design maintains a minimum dropout voltage, enabling it to operate with duty cycles up to 99%. Its resistor-programmable 100 kHz to 1 MHz frequency range and synchronisation capability enable optimisation between efficiency and external component size. The LT8631’s 20-lead TSSOP package with high voltage lead spacing ensures a compact, thermally efficient footprint for high voltage applications.
100V, 1A, synchronous step-down regulator: Iq of 7µA – [Link]