remote control slide projector - ultrasonic projector control

10-24 — elektor october 1980 remote control slide projector remote control slide projee ultrasonic projector control The following equation sums up the main problems normally associated with the presentation of slide shows. Feet (guests x 2 and sometimes 4) x number of cables + darkness = ever present and imminent disaster. There are additional factors of course. a) The feet can be very young and therefore far more active. Further- more, the complete package comes equipped with hands (also active). b) Our four-legged friends carry an arsenal of teeth around with them (try buying tooth-proof cable). c) The telephone interrupt. "I"ll get it ..." This may all sound "tongue in cheek" but the fun will really end when the projector leaves its temporary resting place and heads towards a permanent one on the end of a fast-moving cable. The answer is therefore to get rid of the wires and everyone, including the presenter, can get down to enjoy the show. Four functions Most modern slide p...