What effect does your multimeter input impedance have on the circuit you are measuring? Dave shows a practical example of how it can really screw things up if you aren’t watching out for it.
EEVblog #584 – What Effect Does Your Multimeter Input Impedance Have? - [Link]
A new multi-band satellite antenna developed by Imec in collaboration with Septentrio was announced at the Mobile World Conference held recently in Barcelona, Spain. The antenna is a multi-band design capable of simultaneously receiving GPS, GLONASS, BeiDou and GALILEO satellite signals. The resulting receiver is capable of resolving its location to within 1 cm.
The antenna is paired with Septentrio’s credit card-sized AsteRx-m receiver, a dual frequency GNSS (Global Navigation Satellite Systems) receiver that provides centimetre accuracy while drawing less than 500 mW
SatNav Antenna Fixes your Position to 1 cm - [Link]
scasagrande shared his project antiAFK in the dangerousprototypes project log forum:
The antiAFK is essentially a stripped down Arduino Leonardo with the intention of sending occasional keyboard commands to the attached PC with the intention of preventing the user from being logged out of online games due to inactivity. This can help on high population servers where being kicked back to the login queue can mean that you miss a group event. It randomizes the time between presses (with a min and max), the key from a set of valid keys, and the duration of the key press event. The period, variance, and valid key set are configurable by the user through the CDC serial port.
antiAFK – Sending random keyboard commands - [Link]
Startup company Aquion Energy gave MIT Technology Review a behind-the-scenes look at their battery manufacturing process. The company’s goal is to make non-toxic, cheap batteries for storing off-grid energy. The batteries will first be sold in regions that don’t have access to an electrical grid, such as rural areas and villages in poor countries.
How to Make a Cheap Battery for Storing Solar Power - [Link]
Switching of three-phase motors or a realization of a sophisticated installation is a breeze with industrial relays Finder.
As we know, a relay is a very versatile component, able to realize also various “sequential” circuits, when for example by switching one relay we´ll switch on a target device and at the same time we´ll enable (or disable) switching of another relay. In these case, it´s an often demand for a relay to have a sufficient number of poles. Majority of such “logic” circuits can be realized even with a common 1-2 pole relays, but it´s not always economical and it also brings another costs for solution of supplying and protection of logic circuits.
- Finder 55 – miniature industrial relay for a PCB or for socket, 2-4 poles, 7-10A (switching current up to 20A), 250/400VAC,
- Finder 60 – a more robust industrial relay for a socket, 2-3 poles, 10A (switching current up to 20A), 250/400VAC,
In the series 55 can be found types which can be soldered directly into a PCB (without a socket) or to insert into some of many available sockets (for PCB, with soldering pins or on a DIN rail). Types from series 60 need to be inserted into a socket (for PCB, with soldering pins or on a DIN rail). Naturally, for eventual repair/maintanance, it´s much better to use a socket. Sockets can be equipped with metal or a plastic clip. Also exists a socket 94.94.3 with a safety separation of an input and output part. Similarly like at majority of Finder types, sockets can be equipped with optional protection and indication modules. Read the rest of this entry »
A website that overlaps a photo of the Arduino UNO board, with the name and the goal of a component when you move your mouse over this component.
ArduMap – Arduino mouse over map - [Link]
The Arachnoid Mobile Platform is an open source robotics development platform used to make small autonomous moving robots. It can be either configured as a four-legged robot, or as a two wheeled robot. The PCB board holds all the electronics and mechanical components, and also serves as the chassis of the robot.
AMP – Arachnoid Mobile Platform - [Link]
Heptagon Micro Optics Pte. Ltd. (Singapore) has announced that their 2 by 2 3D imaging system for use in smartphones, phablet and tablet computers is now ready for mass production. The TrueD H2 array camera is said to be the first in a series of 3D imaging and depth-sensing cameras that Heptagon will be introducing to the market.
Heptagon’s manufacturing processes enable the system aperture; stray light control and infrared cut filter to be integrated onto a single glass wafer. The assembly can withstand reflow temperatures and its no-focus lens eliminates the need to refocus after assembly. As well as grabbing the image the array camera captures short-range depth information that can be used for gesture and user recognition and allows background removal and image enhancement. Although this feature would typically be useful on a smart device’s front-facing camera, Heptagon state that it could also be used to complement the smart device’s primary high resolution image sensor. Applications include supporting 3D and immersive mobile video games as well as augmented reality overlays. [via]
Heptagon announce 3D Array Camera - [Link]
This soldering station controls a 24v 50W solder. Based on ATmega328p microcontroller, with combination of IRL3103 or IRFZ44 MOSFET, 5v 0.5A and 24v 3A power supplies,1500uF 35v capacitor, DS1307 – Real Time Clock, MAX7219 – 4 digit 7 segment LED driver, LEDs and other electronic components. Hakko 936 soldering iron handle with thermocouple control. A LM358 amplifies signal from thermocouple with gain 101.
DIY Soldering Station - [Link]
Lonnie Honeycutt writes:
This is the Nokia 5110 84X48 display that was used on millions of phones in the late 90′s. In this video, I show how to connect the Nokia 5110 LCD to an Arduino Uno, import the correct libraries to the Arduino IDE, and write code to generate text and graphics on the display.
How to use the Nokia 5110 84X48 LCD display with Arduino - [Link]