| The proposed transmitter provides an optical(infra-red). that is, wireless, connection to a head-phone. The receiver is described in the nex...
All items tagged with PDF and Time (297)
| This article is one from our 90s collection, the articles are downloadable as a PDF for all our members. Although the information we have on...
| This article is one from our 90s collection, the articles are downloadable as a PDF for all our members. Although the information we have on...
| The super starter makes it possible to start cars with ageing batteries and obsolescent (coil-based) ignition systems, particularly during...
| This signal generator provides a 440 Hz sine wave output at two levels. The power supply may lie between 1.5 V and 16 V, so that even a...
| When an appliance ceases to operate, there may be various causes for this, one of which isthe blowing ofthe mains fuse. The monitor prop...
| Any push-button switch can be used as a bounce-free, change-over switch with the aid of two D-type bistables contained in a 74HCT74 and...
| The scanner is an extension for the 'AlI-solid-state preamplifier' published tn the December 1989 / January 1990 issues of this magazine....
| From time to time one comes across appliances in second-hand goods stores that were designed for operation from a 110 V a.c. (50/60 Hz)...
| Although a 9.5-24 V direct voltage can be brought down to 5 V easily by a standard regulator, the converter described here has the advant...