Timeline for Contactless door bell circuit diagram
Current License: CC BY-SA 4.0
11 events
| when toggle format | what | by | license | comment | |
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| Mar 7, 2023 at 18:15 | history | edited | TonyM | CC BY-SA 4.0 |
Typo' fix.
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| Mar 7, 2023 at 16:33 | answer | added | AnalogKid | timeline score: 2 | |
| Mar 7, 2023 at 16:28 | comment | added | user319836 | The + and - symbols on the photodiode are backwards. Actually diode labels if needed should be A and K. The polarity of the diode voltage is circuit dependent. | |
| Mar 7, 2023 at 15:54 | comment | added | JRE | The infrared detector is incorrectly drawn as an LED. The arrows should be pointing at the diode to indicate that it is a photodiode. | |
| Mar 7, 2023 at 15:54 | answer | added | Eduardo Cardoso | timeline score: 0 | |
| Mar 7, 2023 at 15:48 | history | edited | JRE | CC BY-SA 4.0 |
deleted 7 characters in body
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| Mar 7, 2023 at 15:44 | history | edited | Kafka | CC BY-SA 4.0 |
added 56 characters in body
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| Mar 7, 2023 at 15:38 | history | edited | TonyM | CC BY-SA 4.0 |
Spelling and grammar. Split up solid block of text into paragraphs for clarity.
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| Mar 7, 2023 at 15:36 | comment | added | Andy aka | You say LEDs but, I only see one LED (TX). I don't know why RX is shown as an LED when it's used as a photodiode. This is why we use symbols in schematics; to indicate functionality. The BJT needs a base resistor. Does touching the doorbell remove a block between TX and Rx or, does it introduce one? Maybe it works by IR reflection somehow? | |
| S Mar 7, 2023 at 15:22 | review | First questions | |||
| Mar 7, 2023 at 15:25 | |||||
| S Mar 7, 2023 at 15:22 | history | asked | Kafka | CC BY-SA 4.0 |