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  • theb42 commented on Kurt E. Clothier's instructable Zener Diode Shunt Regulator1 week ago
    Zener Diode Shunt Regulator

    Say you are charging a super capacitor where "VBat" is located in your circuit and the voltage across the capacitor is just 2V currently and you have a 3.3V zener diode and resistor attached to the capacitor as shown in your circuit and want to start dumping the excess voltage when the capacitor reaches the 3.3V zener voltage.... My question is there a small current that flows through the resistor and the zener diode even when the zener voltage has not been reached? What happens when you hook up a 2V supple to the 3.3V zener diode as shown? How much power is lost?

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