Digital pattern generator

Digital pattern generator: During the construction and testing of digital circuits, there is often a need for an accurately defined bit pattern. The generator described here uses an EPROM to store the bit information for the desired pattern. When switch S1 is pressed, a given pattern is generated once; seven different patterns can be generated simultaneously. The eighth[…]

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Miniature crystal oscillator

Miniature crystal oscillator: Nowadays, with the advent of SMT (surface mount technology), it is possible to construct tiny circuits. In the case of crystal oscillators, however, this may not always be feasible because of the size of the crystal. Fortunately, Statek, a specialist crystal manufacturer, produces crystals measuring only 8x4x1 mm for SMT. Together with[…]

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Compact RS232 isoltaer

Compact RS232 isoltaer: The MAX252 from Maxim is a special IC for designing an electrically isolated RS232 connection. Such links are particularly important when several pieces of equipment (which may or may not be isolated from the mains) are to be interconnected and they have different earth potentials. The chip is available in two modes: A.[…]

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