The top circuit, designed by Andre De-Guerin illustrates using a 100uF capacitor to double the battery voltage to obtain 3 volts for the LED. Two sections of a 74HC04 hex inverter are used as a ...

A further spray-coating process led to silver nanowires forming only along these sticky lines, creating an intricate network. Using this technique, the researchers fabricated a series of 25cm-long, ...

Question A LED takes a current of 12.5 m A when the voltage across it is 2 V. Draw a suitable circuit and calculate the value of the series resistor needed to operate the LED from a 9 V battery.

Many equipment manufacturers prefer protection circuits combining resettable overcurrent protection devices with upstream fail-safe protection. In this example, R1 represents a ballast resistor used ...

Or voltage variation can occur if an LED in one string is shorted. In Fig. 2, the power-limit circuit is formed by R11, R12, R13, R14, Q11 and Q12.

In a series circuit, the current passes from the power source to the first light, then the next, then the next, and so on, until it returns to the power source and completes the circuit.