Modular electronic timer

摘要: Electronic timer (1) of the type used for producing command signals to initiate and discontinue operation external devices such as pool pumps, lights, like. The is organized adapt it a modular arrangement whereby modules are easily added increase number different provided. includes common bus which there applied plurality parallel pulse that in combination define timing interval divided into sequence time slots. A independently operable decoders (101, 102, 103, 104) connected so all continuously monitor signals. Preferably, generated control center module (2) propagates them one or more other each contains at least pair 104). Each decoder gating circuitry produce signal further manually adjustable input (9, 10, 11, 12) completing flow paths from cause output during selected