Definition
Voltage, also called electromotive force, is a quantitative expression of the potential difference in charge between two points in an electrical field. It is measured in Volts.
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Single LED as Voltage Level Indicator
Introduction
In many circuits we need to display battery voltage level, most of the battery operated device need indication for battery level such as solar lamp, charger circuits. LEDs are most popular to show status of system such as power on/off, Level indication Low, High, Medium etc. LEDs are available in various sizes and colors, they are simple to use and offer design flexibility. Let’s start with our first example LED as voltage level indications. This can be useful in battery level indication applications. Continue reading Single LED as Voltage Level Indicator