by Publitek European Editors: Building an Arduino system that harvests energy from the environment provides a significant amount of freedom from wiring, but requires some close attention to the system design. Using power from the environment and wireless links frees up the board from any wiring and gives tremendous flexibility for placing the equipment
bleuchez.wordpress.com writes: I’ve recently become interested in Nixie tubes. Nixie tubes are neon filled glass tubes that contain cathodes in various shapes, numbers being the most common, and a mesh anode. Passing a current through the cathode causes the neon gas to ionize which makes it light up.
Abstract: The reality of modern, small form-factor ceramic capacitors is a good reminder to always read the data sheet. This tutorial explains how ceramic capacitor type designations, such as X7R and Y5V, imply nothing about voltage coefficients.
This project is about building a microcontroller-based digital room thermometer plus hygrometer that displays temperature and relative humidity on 4 large (1 inch) seven segment LED displays which adjust their brightness level according to the surrounding illumination. It consists of a closed loop system that continuously assesses ambient light condition using an inexpensive light-dependent resistor (LDR) and uses that information to adjust the brightness of the display.
TrH Meter: A DIY indoor thermometer plus hygrometer with adaptive brightness Read More »
Alexander Holler writes: [ via ] This page describes how you can use a small AVR device and a real-time clock (RTC) to build a hot-pluggable USB real-time clock (I’ve named it just usb-rtc), mainly for usage with ultra-low-cost hardware meant to be used with Linux. The overall cost for one of those thingies I’m describing here is about 15€-20€, which isn’t really cheap.
Brian Bailey writes: Moore’s Law may not be running out of steam, but it may be running out of money, as scaling to smaller geometries becomes more cost prohibitive. We also have an insatiable appetite for memory these days, but our tastes are changing from DRAM to nonvolatile memory—a market largely served by flash devices
Online Voting Open for Readers through December 31, 2012 Miami, Florida, December 6, 2012 – T&M Atlantic today announced that Test & Measurement World has named power supplies AKTAKOM APS-73xxL series as a finalist in the Best in Test Awards competition . The awards recognize the best in test products and test professionals.
Get professional Soldering Station Weller for free! Subscribe for unique newsletter and one of you will be rewarded by Weller soldering station in value 1100 €. SOS electronic prepares for its customers and fans a unique newsletter, which is tailor-made
Get professional Soldering Station Weller WX2021 for free! Read More »
Moshe Gerstenhaber and Mark Champion write: Numerous applications require the measurement of very low resistances, including but not limited to fuse integrity analysis, relay characterization, and superconductor evaluation. There is a wide range of commercially available equipment designed for this task, but these units are prohibitively expensive and cannot be practically integrated into many applications outside the laboratory. A common low-cost and compact method of measuring resistance is to inject a known dc current into the unknown resistor, measure the resulting voltage and calculate the resistance using Ohm’s law. Unfortunately, for very low resistances, the current required to generate a voltage sufficiently distinguishable from the surrounding noise becomes impractically large. Complete, low-cost, software programmable ohmmeter measures micro-ohms – [ Link ] Low Ohm Meter – Measures 0.001 up to 1.999 Ohm Accurate Milliohm Measurement AC Ohmmeter – ESR Meter Ohm’s Calculator Test the safety of your devices with the VA588 multimeter
Complete, low-cost, software programmable ohmmeter measures micro-ohms Read More »
Welcome the new Arduino – the Esplora ! It’s shaped like a game controller, and it’s designed to be used out of the box as it comes with many sensors and actuators already on it (you can add a couple of extra ones). In more detail, the Esplora combines a light sensor, a temperature sensor, a 3-axis accelerometer, a joystick, a set of pushbuttons, a slider, an RGB LED, and a buzzer, together with a Arduino-compatible processor (ATmega32u4).
