the printed circuit board 502 also illustrated are the electrical connections 308 and 310 coupled to the decoder circuitry 504 for connection to the control wire path of the decoder based irrigation control system as well as electrical connections 506 and 508 extending from the decoder circuitry 504 into the coil housing 306 to electrically couple the decoder circuitry 504 to the wire coil of the coil housing 306 it is noted that the decoder circuitry 504 as well as the coil housing 306 including the coil formed within are well known in the art for example in one embodiment the decoder circuitry 504 is found within commercial decoder modules available from the rain bird corp glendora calif for example a single channel single coil decoder part number fd 101 likewise in one embodiment the coil housing 306 is commercially available from the rain bird corp glendora calif as rotor coil part number 212165 in accordance with one embodiment a commercially available coil housing such as coil housing 306 is electrically coupled to commercially available decoder circuitry such as decoder circuitry 504 via electrical connections 506 and 508 such decoder circuitry includes electrical input connections such as electrical connections 308 and 310 to be coupled to the control wire path of a decoder based irrigation control system the decoder circuitry 504 and coil housing 306 are then inserted into a volume see volume 706 of fig7 formed within a housing such as the decoder housing 304 such that the electrical connections 308 and 310 extend through at least one opening formed in the decoder housing 304 generally a portion of the coil housing 306 extends into.