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| Information requested: automatic flashlight/torch |
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| Connecteur:
Does anyone know of an automatic flashlight/torch that incorporates both a motion sensor and a light sensor? It would turn on in dark conditions when it detects movement. It would not turn on in a dark pocket, nor would it turn on sitting on a shelf, or in a dark drawer. Seems like an excellent idea. I'd build one myself, but I'm not good at building micro-circuitry or programming microcontrollers. |
| DmitryL:
What's wrong with off-the shelf simplest PIR modules ? Search on ebay for "PIR module" and you'll find thouthands of them. Their schematics is pretty simple and well documented. Yes, I made several MCU-controlled PIR modules with light sensors and LED drivers, but I needed programmable LED fade In/Out rate (smooth On/OFF), programmable ambient light level, re-triggering when it is ON and motion is detected, and other bells and whistles. BWT, it will be constantly turning ON in your pocket :) Because it is dark there and constant changes in IR ambient picture :) |
| Connecteur:
--- Quote from: DmitryL on November 20, 2020, 04:54:11 pm --- BWT, it will be constantly turning ON in your pocket :) Because it is dark there and constant changes in IR ambient picture :) --- End quote --- Correct, so it would need a proximity sensor to detect being in a pocket. |
| RenThraysk:
Not aware of one. There are non contact controlled lights, those are mainly headlamps, so don't have to fumble with buttons whilst gloved. There are emergency flashlights (IKEA has the Fryele) that are meant to be plugin into mains constantly to keep the battery topped off, and which light up if the power goes out. If the problem is locating the flashlight in the dark, then there are flashlights with moonlight or firefly modes. Zebralight is one manufacturer that makes lights that go down to around 0.05lm, which has so low draw that a single charge on a quality 18650 can power it for 4 months or something. So never really need to turn it off at night. |
| Connecteur:
It seems like a fun project. A flashlight that would light up when you approached it and continued to stay on while you moved it. A proximity sensor would prevent it going on when it's being transported in a bag or pocket. |
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