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Most microcontrollers have a built-in digital-to-analog converter (DAC), but what can we do when this isn’t accurate enough? Look no further: the solution is right in front of you.

The proposed application interfaces any system configured in wheastone bridge for measurement of temperature, pressure, voltage, etc. The Wheastone bridge configuration allows you to read voltages lower than one millivolt with great precision. The dimensions of the card are 1.40 x 1 inch: very

The proposed application interfaces any system configured in wheastone bridge for measurement of temperature, pressure, voltage, etc. The Wheastone bridge configuration allows you to read voltages lower than one millivolt with great precision. The dimensions of the card are 1.40 x 1 inch: very

34 UNIVERSAL MIDI KEYBOARD INTERFACE by D. Doepfer The feature par excellence of the MIDI-compatible keyboard controller described in this article is its ability to be used with practically any existing keyboard, whether salvaged from a discarded musical instrument, or still in function in a piano

A computer is suitable for making (audio) measurements thanks to the sound card that is usually built in. Unfortunately, the audio input on laptops is usually too sensitive to measure somewhat larger AC voltages. A small amplifier/attenuator circuit then comes in very handy. If you build or repair a

In an earlier article on light intensity measurement using the PC (Elektor Electronics February 1998 Supplement) it was claimed that accurate time measurement is very difficult to implement in Visual BASIC. Our reader Mr. Feltes had second thoughts about this, and shows that it can be done!

Reducing energy consumption and increasing energy efficiency are key strategies for mitigating future energy problems. In this connection, the EU has specified requirements for the environmentally compatible design of energy-using products in Directive  2009/125/EC. The aim of this directive is

used and the purpose of the measurement. With those in mind, it is possible to select the most suitable instrument for a given measurement. Judging and interpreting the measurements are the next important steps. Basically, each and every measuring instrument produces errors. The magnitude of such

The ‘Universal Interface for Windows’ designed by Burkhard Kainka (Elektor Electronics, December 1999 Supplement, page S2) provides for a range of input interfaces along with eight digital outputs, all under direct control of a PC’s serial port. The program (available for free

This module provides a simple user interface for extending microcontroller-based circuits. Graphics and text display commands can be sent to it over a serial interface, and, using its UART, the module reports back when the state of any of six inputs changes. Additional firmware can display a