| The current source in the diagram, which react very fast to changes in the input signal, may be used, for instance, in certain measureme...
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| The function of this circuit is to sound a buzzer, or, optionally, actuate a relay, when a certain moisture level is detected between a...
| Microsoft Windows looks poised to reign supreme as the operating system for PCs used at home and in the small office. Competition is weak,...
| Today there are so many variants of surround sound in circulation that even professional audio eng ineers find it difficult to keep tra...
| The program called FFTEXE turns your PC into a spectrum analyser which employs a Soundblaster-16 card (or a 100% compatible type) to digit...
| This circuit enables a model train to shuttle continuously between two tracks. When the train travels from left to right across the track in...
| The lead-acid battery forms the heart of the electrical system in any car. If you are on a camping or caravanning holiday, it can happen th...
| After last month's introduction and the description of the dissolve unit and the projector, we are now ready to tackle the construction of...
| This detector will help you find fairly large objects that consist of materials with a relatively high permeability.
| Having a recent arrival in the family meant that some form of baby alarm or monitor was required if 'junior' was not to 'wah' unduly in h...