| The ignition warning light in a car indicates whether the battery is being charged or not (and indeed whether it is connected properl...
K. Bachun (3)
| The meter described in this article is suitable as an anemometer for use by yachtsmen and surfers, and also as a flow meter for use in air...
| Knowing the current drawn (by a battery) or generated (by a solar cell) over aperiod of time is a requirement in many applications that c...