File:SiC LED historic.jpg
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SiC_LED_historic.jpg (640 × 426 pixels, file size: 74 KB, MIME type: image/jpeg)
Summary
This image shows a replication of H.J. Round's experiments in which he discovered the effect underlying the light emitting diode (LED). A negatively charged needle contacts a positively charged crystal of silicon carbide or carborundum. At a voltage of 9 V and a current of 30 mA a green glow can be observed at the contact point between needle and crystal. A more detailed version of the setup can be found at <a rel="nofollow" class="external text" href="http://www.dlip.de/?p=99">www.dlip.de</a>
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 18:32, 5 January 2017 | | 640 × 426 (74 KB) | 127.0.0.1 (talk) | This image shows a replication of H.J. Round's experiments in which he discovered the effect underlying the light emitting diode (LED). A negatively charged needle contacts a positively charged crystal of silicon carbide or carborundum. At a voltage of 9 V and a current of 30 mA a green glow can be observed at the contact point between needle and crystal. A more detailed version of the setup can be found at <a rel="nofollow" class="external text" href="http://www.dlip.de/?p=99">www.dlip.de</a> |
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