[Fredzislaw100] out of Poland posted a video of a circuit that should not exist ... high frequency AC with an inductor wired in parallel with the LED and the third switch. For those of you ...

The current flowing in a parallel circuit can be investigated by connecting the circuit below. Once more, put one ammeter in position A 1 and record the reading in a suitable table. The current in ...

In the simplest circuit, you could drive an LED with a TL431. Connect an LED and a current-limiting resistor up to the cathode and ground the anode of the TL431. Then, when the voltage on the ...

Once the capacitor voltage reaches 5V (or 5.4V as I couldn’t find a 4V3 Zener), the Zener pulls the transistor on and lights the leds. The 3n3 capacitor gives the circuit some positive feedback by ...

Suppose a manufacturer recommends a maximum voltage of \(2V\) across their LEDs and maximum current of \(10mA\). Using properties of a series circuit, the sum of the voltages across the LED and ...