Timeline for Simple transformer construction help
Current License: CC BY-SA 4.0
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| when toggle format | what | by | license | comment | |
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| Aug 4, 2022 at 19:05 | comment | added | shwoseph | This video really helped me to begin to understand impedance matching: m.youtube.com/watch?v=DovunOxlY1k | |
| Aug 4, 2022 at 18:57 | vote | accept | shwoseph | ||
| Aug 4, 2022 at 20:59 | |||||
| Aug 3, 2022 at 16:45 | history | edited | TimWescott | CC BY-SA 4.0 |
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| Aug 3, 2022 at 9:34 | history | edited | winny | CC BY-SA 4.0 |
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| Aug 3, 2022 at 2:04 | comment | added | TimWescott | Stepping up the input means that the impedance presented to the radio is lower. This makes things even further from an impedance match, which reduces the radio's ability to transfer power to the earphones -- and since the only energy you have is what the radio harvests from the aether, you can't throw away available power. electronics.stackexchange.com/questions/13631/…. | |
| Aug 3, 2022 at 1:51 | comment | added | shwoseph | Thanks. I have already been using a piezoelectric earpiece and it works nicely. I wanted to try this because of some videos that I’ve seen demonstrating that a transformer and crystal radio can drive a modern earbud. I’m having a hard time grasping how the impedance of the radio affects things. I understand that higher impedance is better for the earpiece because of voltage divider, but if you can step up the input voltage enough it shouldn’t matter whether the earpiece has high impedance, right? | |
| Aug 2, 2022 at 23:52 | history | answered | TimWescott | CC BY-SA 4.0 |