Provided is an electronic device having a control device, a driver circuit coupled to the control device. The driver circuit is configured to alter conductance. A partial power source is coupled to the control device and is configured to provide a voltage potential difference to the control device and the driver circuit as a result of the partial power source being in contact with a conductive fluid. The partial power source includes a first material electrically coupled to the control device and a second material electrically coupled to the control device and electrically isolated from the first material. An inductor is coupled to the driver circuit. The driver circuit is configured to develop a current through the inductor. The magnitude of the current developed through the inductor is varied to produce an encoded signal that is remotely detectable by a receiver. Receivers to receive and decode also are disclosed.本發明提供一種電子裝置，其具有控制裝置和耦接到該控制裝置之驅動電路。該驅動電路係配置用以修改傳導性。部分電源係耦接到該控制裝置，由於該部分電源係與導電流體接觸，該部分電源係配置用以提供電壓位差到該控制裝置和該驅動電路。該部分電源包含電耦接到該控制電路之第一材料、及電耦接到該控制電路且與該第一材料電隔絕之第二材料。感應器係耦接到該驅動電路。該驅動電路係配置用以發展通過該感應器的電流。所發展通過該電感器之該電流的大小係變化以產生透過接收器可遠程偵測之編碼信號。本發明亦提供一種用以接收和解碼的接收器。
