tengyy
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I wish to build a 1.5V batter power indicator, can someone give me some guideline ?
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I wish to build a 1.5V batter power indicator, can someone give me some guideline ?
Buy a solar garden light and disconnect its solar panel or cover it with opaque tape. Most come with a single Ni-Cad battery cell.
Most still light an LED when the battery voltage drops to 1.0V.
A cheap solar garden light has a 3.2V white LED that is lighted from a voltage stepup circuit powered from a Ni-Cad rechargeable AA battery cell. The cell is 1.4V when charged and the LED is lighted until the voltage drops to about 1V. The led gets dimmer as the battery voltage runs down.I dont understand your meaning, in simple a rechargeable 1.5V battery can light up the LED ?
May i ask how to identified power of the rechargeable battery? only the brightness of led ?