More about technology (449)

1-12-1992 | If you ever need to derive a 5 V line from, say, a 15-25 V supply, National Semiconductors LM1575 and LM2575 are ideal. These switched 5-...

1-12-1992 | Most debounce circuits shorten or lengthen the time a switch is pressed to obviate interference pulses caused by switch bounce. The pres...

1-12-1992 | The charger makes cunning use of the properties of a Type 555 timer. The tnternal window comparator of the lC is set to 4.7 V by zener dio...

1-12-1992 | One advantage bipolar opamps have over FET types is that their input noise level is appreciably lower. However, when abipolar opamp is us...

1-12-1992 | Control elements in electronics often use a small current to control a large one. In fact, this is such a common situation that there is...

1-11-1992 | The high consumption of electrical energy, prompting fears of exhausting traditional fuels used by power generating plants, has paved the...

1-10-1992 | Some methods used in electronics are based on models that cannot, in fact, be the case. For example, currents flow continuously and yet co...

1-10-1992 | About a year ago I reviewed the Boardmaker2 software for the drawing of sehemaues and PCB layouts. This package does not allow the schem...

1-07-1992 | When the Atari ST is provided with an external hard-disk drive, it has to be reset after about 15 seconds, as otberwise the drive is not...

1-07-1992 | The proposed transmitter provides an optical(infra-red). that is, wireless, connection to a head-phone. The receiver is described in the nex...