Dave started out wanting to investigate the power-on spike on the Rigol DP832 Lab Power Supply, but ended up hunting down a reset bug that uncovered a bad thermal design mistake in the supply.
EEVblog #512 – Rigol DP832 Bad Design Investigation - [Link]
Here is a small collection of circuits that provide an interface to sensor transducers including pressure, temperature, and others.
This circuit provides a highly integrated analog sensor signal conditioner targeted for automotive applications. The device provides amplification, calibration, and temperature compensation. Output is digital. Read the rest of this entry »
Graphene is by definition flat and planar, but researchers at Michigan Tech have discovered a manner of fabricating 3-D graphene–a honeycomb structure that can replace the expensive precious metals in solar cells and potentially other energy applications such as batteries and even superconductors. [via]
3D Graphene for Cheaper Solar Cells - [Link]
Excellent digital storage oscilloscopes HAMEG HMO can be now obtained with a discount without any other conditions.
The only “condition” is an order placed within August 30-th 2013. The offer is valid for all types of the HMO series,which we currently have in stock. And why just Hameg (member of Rohde & Schwarz)? Because these oscilloscopes provide a unique price/ performance ratio and in many ways they create “their own class” of devices.
We introduced you several functions of the HMO oscilloscopes in our recent articles. A big plus is a considerable user comfort and an intuitive operation despite wide possibilities of these devices. Should we mention at least one function increasing a comfort, then it could be for example the “Virtual Screen” function, which adds a scroll-bar to the screen on the Y axis and increases resolution in the vertical axis up to 1200 points (20 divisions). This is especially handy when the optional 16 digital inputs are used, as displayed on the attached picture.
-15% discount will be deducted from the current price (displayed in our e-shop) after processing of your order. The offer is valid through August 30-th 30.8.2013 or until stock sell-out. In case of interest, please contact us at firstname.lastname@example.org.
Hameg oscilloscopes for holiday prices -15% for all – [Link]
MIT has designed an ultra-low cost “flow” battery that it claims will store 10-times as much energy as lithium-ion while consuming 10,000 times less power, making it a candidate to meet the Department of Energy’s target of less than $100 per kilowatt-hour for grid-scale deployment. [via]
MIT’s flow battery simplifies rechargeable technology by eliminating the ion-exchange membranes. The lower solid graphite electrode reduces liquid bromine to hydrobromic acid, while hydrogen is oxidized at the upper porous electrode.
Flow Batteries Go Mainstream - [Link]
With DVR becoming increasingly common over the last few years, DirecTV has sought to distinguish its offerings on that front with multiple levels of service. At the top of the DirecTV DVR receiver options, the Genie offers a huge array of features on a powerful piece of hardware. You can get the newest Genie by signing up for DirecTV using www.SaveonTVDirect.com. For the average user, this means a better viewing experience; for the advanced user, this means the opportunity for interesting hacks; for the enterprising salvager, this means useful parts to collect from an unused or broken unit.
So let’s talk about all the uses you can get out of a Genie, whatever your experience level or goals. Read the rest of this entry »
Epson has combined the reliability of quartz crystals with the tiny dimensions of MEMS devices to create a tiny high-resolution six degree-of-freedom inertial measurement unit that can track motion for everything from aerospace to oil-well drilling. [via]
Epson Downsizes Inertial Measurement Units - [Link]
ba0sh1.com reverse engineered a cheap LED voltmeter he bought from Taobao and made it run on a I2C bus. He writes:
I’m planning to build a EEVblog-ish constant dummy load for battery and power supply testing. Dave in his build used a LCD voltmeter for the display. In the senseless pursuit of difference, I tried other display solutions including character LCD, graphics LCD, OLED, TFT, AMOLED, IPS, which resulted in several previous blogs but nothing ends up to be satisfactory. Along with the complexity grows exponentially from one solution to another, I slowly start to feel the importance of KISS concept, keep it simple stupid. All I need is just a number display, nothing fancy, nothing pricey, nothing takes my attention away from the analog circuitry. I decided to go back to the basic 7-segment LED display. “Simplicity is the ultimate sophistication”, how elegant it is!
Hacking a cheap LED voltmeter - [Link]
The MAX17515 is a fixed-frequency, step-down power module in a thermally efficient system-in-package (SIP) package that operates from a 2.4V to 5.5V input supply voltage and supports output currents up to 5A. The device includes switch-mode power-supply controller, dual n-channel MOSFET power switches, a fully shielded inductor, as well as compensation components. The device supports 0.75V to 3.6V programmable output voltage. The high level of integration significantly reduces design complexity, manufacturing risks, and offers a true “plug-and-play” power-supply solution, reducing the time to market.
MAX17515 – 5A, 2.4V to 5.5V Input, High-Efficiency Power Module - [Link]