Electrically-powered digital clock kit, e.g. for demonstrating electro-chemical power generation, has electrically conductive fluid e.g. in bottle or drink can, with electrodes immersed in fluid

摘要

The kit includes a digital clock unit (50) with two electrical connections to the outside. A holder (12) has a first part (14,15) for receiving the clock unit, and a second part (13) for releasably receiving an electrically conductive fluid. The holder parts are releasably connected together. At least two electrodes are immersed in the fluid, and are connected to the electrical connections.