Linear constantcurrent drivers, for instance, offer low EMI, low cost, and use only a few components. Many designers favor them for low-current applications where power loss is a minor concern. If ...

Light-emitting diodes (LEDs) are often used with a voltage source from a power-supply output voltage. The output voltage increases until the current through the LEDs reaches the value of the ...

For example, often lawnmowers have two switches in series with each other so that both switches need to be pressed before the mower will turn on. The power ring circuit is also a parallel circuit. In ...