Many homes in the United States have water that contains higher concentrations of dissolved minerals, which is called hard water. Although there is nothing toxic about hard water, it is less desirable for cleaning, it leaves mineral deposits, and it can shorten the lifetime or efficiency of equipment such as water heaters.
A water softener is a household appliance that commonly exchanges salt for some of the dissolved minerals, resulting in softer water. The salt supply is stored in a brine tank and must be refilled every month or so. If you forget to refill the tank, the water softener is rendered temporarily ineffective.
Water Softener LED Display - [Link]
Qualmark, world leader in Accelerated Stress Testing has introduced the HawQ, a new, cost-effective, portable solution to your Highly Accelerated Stress Testing needs.
Qualmark HawQ - [Link]
SOS Webinar @ 2014.10.29 10:00 – 11:30 CET
UDOO is a powerful single board embedded SBC based on the powerful Freescale i.MX6 chip, which offers complete and powerful platform for your applications.
- General introduction to the UDOO Board
- Hardware features
- Main aspects regarding the creation of projects with it
- main aspects of creating a Linux or Android project with UDOO boards
SOS webinar – Looking for a powerful platfom for your Linux applications? - [Link]
by Benabadji Noureddine @ edn.com:
Several previously published Design Ideas and appnotes [1-4] show how to use many pushbuttons with a minimum number of inputs. They require an RC circuit where the timing can be measured to identify which pushbutton has been pressed, or an ADC input, with resistors forming a divider for each pushbutton pressed.
The following Design Idea shows another simple way to use up to 15 pushbuttons with only one I/O. The microcontroller chosen must contain an internal comparator with selectable values for the internal voltage reference VREF.
Monitor 15 contacts with one PIC input - [Link]
by appleman123987 @ instructables.com:
The planterbot is a plant monitoring robot. It uses capacitance for sensing moisture from the plant instead of using the usual soil probe, this means that wires don’t go into the plant. It also detects temperature and light using thermistors and Cds photocells and displays the temperature and light graphically on the front facing LCD.
Planterbot – The Plant Monitoring Robot - [Link]
The ChronodeVFD is a personal project I’ve been working on for a couple of months. It’s a wristwatch built around the IVL2-7/5 VFD display tube. I originally purchased a few of these tubes to build a standard desk clock, but after playing around with them, I realized I could probably build a wristwatch too. The tube has a number of features which make it more suited than most Soviet-surplus VFDs for this purpose.
ChronodeVFD: Wearable Electronics VFD Wristwatch - [Link]
Today, we’ll be discussing Rigol’s MSO2302A Mixed Signal Oscilloscope from the MSO2000A series. Starting at $1,239, this oscilloscope features 300 MHz bandwidth, with 2 giga-samples per second, a memory depth of 14 megapoints (Mpts), with an option up to 56 megapoints. The large 8 inch high resolution screen typical to Rigol scopes allows for easy review of your data. 2 channel input and has an ethernet connection for networking and USB ports to interface with computers, save waveforms to USB storage devices, or print directly to printers.
Tech Lab – Rigol MSO2000A Series Oscilloscopes - [Link]
by deba168 @ instructables.com:
One year ago, I began building my own solar system to provide power for my village house.Initially I made a LM317 based charge controller and an Energy meter for monitoring the system.Finally I made PWM charge controller.In April-2014 I posted my PWM solar charge controller designs on the web,it became very popular. Lots of people all over the world have built their own. So many students have made it for their college project by taking help from me.I got several mails every day from people with questions regarding hardware and software modification for different rated solar panel and battery. A very large percentage of the emails are regarding the modification of charge controller for a 12Volt solar system.
Arduino solar charge controller and energy monitor - [Link]
by Jose Daniel Herrera @ arduino-cool.blogspot.com:
I present this new Arduino project: A full MP3 player based on Arduino.
As you can see in the photo, the idea was to build a standalone player, in the style of antique radios or ‘tapes’, in the age of Iphones ….
The player uses a small module based on the VS1002d chip (now discontinued, but who had a drawer). The module in question I bought at Futurlec . Currently you can get similar modules on ebay for a bit more than 10$, although the chip is the VS1003 o VS1053. You can also use a SparkFun MP3 shield, but significantly more expensive (this shield already includes an SD slot).
The three chips are quite compatible in terms of programming, and indeed almost all initialization the I have taken from the library to the SparkFun MP3 Shield
Arduino standalone MP3 player - [Link]
An application note (PDF) from MAXIM:
The typical specification for lithium coin-cell batteries has been to provide a 10-year battery lifetime in the absence of system power. End users should evaluate the anticipated lifetime in their specific application, especially for those that exceed typical commercial environments or that need to last more than 10 years. This article gives the reader an overview of the major factors affecting the lifetime of an IC that can be powered by either the system power or a lithium battery for a backup supply.
Lithium coin-cell batteries: Predicting an application lifetime - [Link]