More about Design (644)

1-05-1994 | Mains signalling is a method by which signals can be superimposed on mains wiring for the remote control of electrical equipment. It was fi...

1-05-1994 | During experimental work, the power supply is often variable or derived from a mains adaptor. In such cases, it is important to eliminate...

1-05-1994 | This articles is the feedbackfrom the readers.

1-04-1994 | Music should be heard and enjoyed as if the orchestra were right in front of you. Unfortunately, neighbours, children and other members of...

1-04-1994 | Mains signalling is a method by which signals can be superimposed on mains wiring for the remote control of electrical equipment. It was fi...

1-04-1994 | In the previous instalment of this article we examined the theory behind direct conversion receivers (DCR). In this final instalment we w...

1-04-1994 | This is an RS232 extension card for the Universal I/O Interface for IBM PCs.The circuit is based on the COM81C17 UART (universal asynchro...

1-04-1994 | A flash tube control circuit is described wh ich is suitable for playful as weil as serious applications. The unit has a flash frequency o...

1-03-1994 | In the design, fault-finding and repairing of audio equipment several pieces of test instrument are either required or just downright use...

1-03-1994 | This article describes a completely updated and higher-power version of the 'Medium power a.f. amplifier' published in this magazine just...