More about design (647)

1-09-1994 | Many small and older cars are not provided with a rev counter, which is a pity, because this instrument is veryuseful tor driving with tue...

1-09-1994 | This inexpensive oscilloscope can be used at frequencies up to 20-30 kHz (optionally up to 1 MHz). It works from 12 V and can thus be use...

1-07-1994 | Microcontrollers are intended to make life simpler (?!) and the equipment in which they are used more versatile. The swell pedal presented...

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...