More about time (745)

1-12-1993 | The transmitter is intended primarilyy for use with the receiver in the preceding article. lt works from two small 1.5 V dry batteries or...

1-12-1993 | To keep the converter simple, it contains no preset controls, which means that the level of the output voltage is dependent to some degree...

1-12-1993 | The indicator shows eight wind directions by means of LEDs. The sensors are reed contacts powered by a permanent magnet. The mechanical co...

1-12-1993 | The monttor is intended for use in relatively small spaces (like living rooms). The sensor is a readily available LM335 from National Semi...

1-12-1993 | RC-5 is the Philips /Sony standard for infra-red [IR] remote control of audio /video equipment. The circuit and the listing given enable...

1-12-1993 | Although good and inexpensive integrated analogue-to-digital (A-D) converters are now readily available, it may be instructive to build o...

1-12-1993 | The indicator shows when a fish has taken the bait. Until that happy moment (at least for the angler), the bite sensor is open, so that b...

1-12-1993 | It is sometimes necessary to make a telephone conversation audible to more than one person at either end or to make a tape recording of i...

1-12-1993 | The time-determining element in the present circuit is capacitor C1, which is charged via a current source based on T1. The voltage acros...

1-12-1993 | The timer, based on EXAR'S Type XR2240, is intended for use in photographie and printed-circuit departments, as a standby switch for 1 V...