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    • #12042

        Hi all !

        Have you also noticed that the capacitor filter block, as shown at the right, has 2 electrolytic capacitors and a resistor ?Filter block

        We can surely do more with this module besides filtering the power supply !
        Let’s start with a simple experiment and make a very large capacitor !
        To do this, we will use the legacy Lectron set as this has the positive grounding.

        Construct the circuit as following :

        Capacitor circuit V1

        After assembly, press and hold S1 till the meter reads 9 (=9 Volts).
        Then press S2 and observe the light bulb.
        Some questions :

        • What is the function of the diode ?
        • What happens if you swap the Ge diode with the Si diode ?
        • How large is the total capacitance of the circuit ?

        Many greetings

        Capcitor circuit setup

      • #12043

          Hi Frank!

          Thanks so much for the New Year contribution and getting 2023 off to a great start!

          I don’t know why a rectifier is needed when we only have a DC voltage as the power source. What is it that you are filtering for?

          Nice photo with the sky being reflected off the base plate.

          Best regards and thanks again for keeping the forum going! M.

          • This reply was modified 1 year, 5 months ago by Michael.
        • #12045

            Hello Michael,

            Indeed it’s the first Lectron contribution of 2023 and hopefully more will follow.

            About the diode, what do you think what will happen if we would substitute this with a simple straight wire block ?

            Look once closely to the diagram and see what happens when the capacitors are charged and we release S1 and won’t press S2 !

            I also love the way how daylight highlights the Lectron modules and how the ground plate reflects the sky !


            • #12048

                Hi Frank,

                I have to admit that I don’t know! Diodes allow current to flow only in one direction (I thought) and as there does not appear to be any AC current, I am stumped.

                I look forward to learning what you are patiently trying to teach. Thank you for always providing such engaging learning opportunities!

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