Fig. 1From: Electricity generation from paddy soil for powering an electronic timer and an analysis of active exoelectrogenic bacteriaa A photo of the serially connected sediment microbial fuel cells (SMFCs) and b circuit diagram. The voltmeter shows a voltage of 1.413 V over the timer, which has been running for 13 h 16 min 55 s. The mirror shows the battery box of the timer, indicating that the battery was replaced by the SMFCsBack to article page