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  • HazardousMaterials made the instructable Light Switch-Loving Kid Toy5 days ago
    Light Switch-Loving Kid Toy

    Thanks for posting the instructable! It was a pretty quick thing to do, and has had more use than expected. The youngest kids like the switches, the other kids use it as a light for their play camping, and one even uses the brighter settings as a stagelight for karaoke.The only changes I made were to use a small piece of circuit board on standoffs to wire up 3 LEDs for each switch (with appropriate resistors) to make more light, and to use zip ties through drilled holes at each end to keep little hands out. (I just use tin snips to cut the ties for maintenance access)It's so much better to have the kids use this to hopefully suppress the desire to use the real switches. The switches, covers, and wiring were pulled out of old construction. The LEDs, resistors, battery cases, et...

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    Thanks for posting the instructable! It was a pretty quick thing to do, and has had more use than expected. The youngest kids like the switches, the other kids use it as a light for their play camping, and one even uses the brighter settings as a stagelight for karaoke.The only changes I made were to use a small piece of circuit board on standoffs to wire up 3 LEDs for each switch (with appropriate resistors) to make more light, and to use zip ties through drilled holes at each end to keep little hands out. (I just use tin snips to cut the ties for maintenance access)It's so much better to have the kids use this to hopefully suppress the desire to use the real switches. The switches, covers, and wiring were pulled out of old construction. The LEDs, resistors, battery cases, etc. were really cheap from the usual overseas sources, and the case was less than a dollar from Home Depot. I haven't changed the batteries yet, an they are the most expensive parts. All in all, it was simple, not expensive, and seems to have lasting value.

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  • HazardousMaterials made the instructable Simple Word Clock (arduino) 5 days ago
    Simple Word Clock (arduino)

    Great project! I ended up taking a few shortcuts, like making the prototyping board permanent, and leaving the back open for repairs, RTC battery replacement, and software updates. The wiring is superglued in place to prevent disconnections. I also added a power stepdown regulator to allow me to use the adapter I had on hand. As a side benefit, since the clock was too bright for a bedroom, turning the regulator voltage down below 12V reduced the brightness nicely. The most complicated things were: 1) doing the wiring (and finding my mistakes in the wiring), and 2) figuring out the proper pin out assignments for the LED (but this is documented in the code, so that was good once I found it and quit the "trial and error" method). I built this with my nephew, and we b...

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    Great project! I ended up taking a few shortcuts, like making the prototyping board permanent, and leaving the back open for repairs, RTC battery replacement, and software updates. The wiring is superglued in place to prevent disconnections. I also added a power stepdown regulator to allow me to use the adapter I had on hand. As a side benefit, since the clock was too bright for a bedroom, turning the regulator voltage down below 12V reduced the brightness nicely. The most complicated things were: 1) doing the wiring (and finding my mistakes in the wiring), and 2) figuring out the proper pin out assignments for the LED (but this is documented in the code, so that was good once I found it and quit the "trial and error" method). I built this with my nephew, and we both found the "mad scientist" effect of the exposed wiring to be more a plus than a minus. It's neat to hear people go "oooh" when you turn the clock around.It's been running for 4 months now and just needed the first time correction (just a few minutes off).Thanks so much for posting this instructable!///

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  • How to Make a Super Flashlight ? TUTORIAL

    Clever idea, but not a safe one at all. These tubes are notoriously fragile and contain mercury. Check out the NBC news report and the EPA 11-step process for cleaning up in the home after breaking one of these bulbs. A flashlight needs to be durable, as after all, you are wandering around in the dark using it, right?

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