With a circuit of a charged capacitor, a resistor, and an LED, I can create a lighten up LED that gradually dims until the capacitor run out of charge. With a combination of a battery, capacitors, resistors, and LED, is it possible to create the opposite effect, that is an LED that gradually lighten up?
This is because the capacitor now acts as the (temporary) power source for the circuit, giving power to the LED, so that it stays on for a short while. A capacitor does not act like a battery, because it dumps its charge very quickly, so that the LED only receives power for a few seconds.
E: Circuits with Two Capacitors and one Bulb. Be sure you have the following components: two capacitors of equal capacitance, two batteries, one light bulb, a switch, several wires, and a stop watch. E1. Connect the two capacitors in parallel as shown in the circuit. (Remember the polarity of the capacitors.)
First it charges the capacitor. For a large capacitor/resistor combination charging is slow enough to be seen. If you replaced C1 with a 0.1 uF the LED will seem to turn on instantaneously. At the same time, it provides a very small current into the transistor base. The transistor amplifies this current to a level high enough to turn on the LED.
After we charge the capacitor with the battery, we're going to disconnect the battery from the circuit. The capacitor will then act as the power source, giving current to the LED so that the LED remains on, though not being powered anymore by the battery.
A capacitor does not act like a battery, because it dumps its charge very quickly, so that the LED only receives power for a few seconds. However, if a power source goes out for a while, the capacitor can act as a temporary power source.
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Connect capacitor, via corresponding terminals, to battery. Wait 1-3 seconds. Disconnect capacitor from battery; connect to light bulb; Expected Result. Light bulb will turn on quite brightly, but will dim gradually until it stops charging
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With a circuit of a charged capacitor, a resistor, and an LED, I can create a lighten up LED that gradually dims until the capacitor run out of charge. With a combination of a battery, capacitors, resistors, and LED, is it …
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To demonstrate the charging and discharging of a capacitor through a light bulb.
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