The MAX6369-74 series watchdog-only supervisors are available in tiny SOT23-8 packages and have selectable watchdog timeout periods (1.7ms to 104s), start-up delays (1.7ms to 104s) and output pulse widths (1.7ms and 170ms) depending on the part selected and the state of 3 pins (SEL0, SEL1, SEL2). These parts have several advantages over the historical “555” solutions. As well as the lower supply current (20µA max instead of 120µA max at 5V supply) the overall solution takes much less board area with the smaller package and the absence of large timing resistors and capacitors.
MAX6369 Series Watchdog Timers – [Link]
Nixie, a tiny wearable quadrocopter camera on a wrist band:
Team Nixie is developing the first wearable drone camera, which can be worn around your wrist. The team will be presenting their prototype for the Intel Make It Wearable Challenge Finale on November 3, 2014 in San Francisco.
Wearable quadrocopter - [Link]
Ioannis Kedros writes:
It’s been a long time since I’ve post a new hobby project of mine! I decided that is time to upload a new one! Like my Sensor Stick module this project will be about sensors as well.
You can find multiple modules out there with various sensing ICs that almost all of them look exactly the same! They are ugly and without properly markings on their surface.
For example, some of those don’t have the input voltage range on the PCB or the pin out names or even the sensor address (in the case of a digital I2C sensors for example). In order to find that info, you have to download files, unzip them, look the schematics of the module then the datasheet of the sensor etc. A time consuming method especially for a quick and dirty prototype!
embeddedday.com – Sensor Modules - [Link]
Voltcraft sets of measuring leads provide several reasons why to choose right them.
Maybe we even don´t realize in a common praxis, how important role is played by measuring leads of a measuring device, the most often multimeter. Firstly, they´re “responsible” for a good transfer of a signal to a measuring device and at the same time they perform an important safety function, especially at measuring of higher voltages or on devices, where such a voltage can appear (unexpectedly).
Testing leads are often exposed to a considerable mechanical stress at measuring. As for the safety, especially older or damaged leads need to be replaced soon and better not to risk a possible injury. Older low quality measuring lead often shows small defects and it´s not that rare, when a broken thin wire (one of many which create a stranded wire) penetrates insulation from inside and stays hidden close to an outer surface. Naturally, in this case we can forget the declared properties of such lead.
Measuring/ testing leads Voltcraft are a novelty in our offer:
● MS-4 – set of safety measuring leads 10A/CATIII/1000V. Leads have a quality classic tip, usable even for a banana F socket. Also included are quality crocodile clamps with a thick insulation.
● MS-4N – set of safety measuring leads with an insulation from extra flexible silicone rubber, 10A/ CATIV/ 600V. Easy and safe removing of tips covers thanks to a click mechanism. Indication lug on a red lead for an easy orientation even in twilight. Extraordinary high flexibility makes the measurement especially pleasant and they´re highly resistant to hot surfaces at the same time.
● MS-7 – set of safety measuring leads 20A/CATIV/600V. A set with the highest current handling capacity from these three sets.
All three sets conform to EN61010-031:2008 safety standard and all of them have removable top covers (as illustrated on attached pictures) for comfortable measuring in tiny places (for example on a PCB). Comparison and basic features of these measuring cords can be found in an attached table.
Voltcraft – above standard quality even in measuring leads - [Link]
The LM43600 SIMPLE SWITCHER® regulator is an easy to use synchronous step-down DC-DC converter capable of driving up to 0.5 A of load current from an input voltage ranging from 3.5 V to 36 V (42 V transient). The LM43600 provides exceptional efficiency, output accuracy and drop-out voltage in a very small solution size. An extended family is available in 1 A, 2 A and 3 A load current options in pin-to-pin compatible packages.
LM43600 – SIMPLE SWITCHER® 3.5V to 36V, 500mA Synchronous Step-Down Voltage Converter - [Link]
The MAX5825PMB1 peripheral module provides the necessary hardware to interface the MAX5825 8-channel DAC to any system that utilizes Pmod™-compatible expansion ports configurable for I²C communication. The IC features eight independent 12-bit accurate internally buffered voltage-output DAC channels. The IC also features an internal reference that is selectable between 2.048V, 2.500V, and 4.096V (4.096V reference operation is not supported with a standard 3.3V Pmod-port power supply).
MAX5825PMB1 Peripheral Module Board - [Link]
It’s Like a Shield for your Shields! Makes debugging your Arduino projects super fast! by Guido Bonelli Jr @ kickstarter.com:
Do you love Arduino development BUT dread testing your hardware because there is no easy way to attach things like your meter, oscilloscope or probes?
Well fear not, ArduinoNaut, Dr.Duino™ is here to the rescue!
Dr.Duino – Arduino Debugging tool! - [Link]
We know you guys like to eat during night (the best time for programming and hacking) but this is a really unhealthy habit and we want you fit and healthy.
The alarm for your fridge activates at a certain time and sends an email (to your girlfriend, mum, enemy or whoever kicks your ass) every time you open the door of the fridge.
Hack your fridge with IoT kit! - [Link]
by Dave Rishavy @ edn.com:
Noise on a signal creates a triggering challenge for test equipment, especially oscilloscopes. Because the instrument itself also contributes noise, small signals in the millivolt range need proper instrument settings prevent noise from overwhelming the signal of interest. Even with larger-amplitude signals, noise can create a condition where a stable trigger is difficult to achieve.
Oscilloscope have built-in features to help deal with the noise. These features can sometimes be buried in menus, or not well known by infrequent oscilloscope users.
View noisy signals with a stable oscilloscope trigger - [Link]
by Glen Chenier @ edn.com:
It is often said that “the devil is in the details.” All too often those details are hidden deep within a datasheet where you can easily overlook them. When a datasheet reference circuit is copied into a product, the designer must still be fully aware of how the circuit functions and anticipate unexpected problems that might arise from slight deviations.
Take a recent case of an LT1640 hot-swap controller IC, often used in a hot-plug telecom fan tray. I was asked to reverse-engineer this so our technicians would know how to power it on the bench without a using a chassis. Nothing complicated about it, just the usual slow turn-on of a pass MOSFET in series with the load, thereby slowing the dV/dt and limiting the inrush current to the load input-filter capacitors.
Missing datasheet details can cause problems - [Link]