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  • W0JT commented on Marsh's instructable Rebuild Your Ryobi ONE+ Battery Pack2 weeks ago
    Rebuild Your Ryobi ONE+ Battery Pack

    There are several incorrect statements in this article. The cells in the NiCd pack are NOT C cells, they are sub-C cells. And even though the complete 18v packs are fully interchangeable (as long as you use the dual-chemistry charger), the individual cells are NOT interchangeable. Yes, you could replace all 15 NiCd cells with 15 NiMH cells. But you can't rebuild a NiCd pack into a Li-Ion pack. The battery management board of a Li-Ion pack has one (P105 or P108) or two (P104) extra electrical tabs that protrude through the top of the case and interact with the dual-chemistry charger. Without that, you would build an incendiary device instead of a battery pack.

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  • W0JT commented on souhadl's instructable Motion Detection Lights 1 month ago
    Motion Detection Lights

    I plan to do something similar to light up the area by door between my garage and the mud room, but plan to have mine more elaborate, with two zones of lighting ((arage and mud room), ambient light sensors to inhibit turning on lights if its already bright, and more than I can fit in the allowed comment space. I'll have to write my own instructible once I get my project beyond the thought stage. I plan to use a totally enclosed 120vac to 12vdc power supply that simply plugs into a wall outlet, so I don't have to deal with lethal voltages. You ALMOST took this approach by dropping the line voltage to 12vdc and 5vdc, but unfortunately you had to bring the 220vac into the project box to attach to the power supply. It would have been safer if the supply had a standard socket into which you ...see more »I plan to do something similar to light up the area by door between my garage and the mud room, but plan to have mine more elaborate, with two zones of lighting ((arage and mud room), ambient light sensors to inhibit turning on lights if its already bright, and more than I can fit in the allowed comment space. I'll have to write my own instructible once I get my project beyond the thought stage. I plan to use a totally enclosed 120vac to 12vdc power supply that simply plugs into a wall outlet, so I don't have to deal with lethal voltages. You ALMOST took this approach by dropping the line voltage to 12vdc and 5vdc, but unfortunately you had to bring the 220vac into the project box to attach to the power supply. It would have been safer if the supply had a standard socket into which you could plug in a standard AC power cable. By the way, to the many posters who suggested a wall wart power supply, I doubt that most such devices could provide enough amps to light the LED's. My planned project will use up to ten 3 watt LED devices, so my PS will be 12v @ 5amps or 60 watts capable. ANyway, thanks for sharing your project and thanks to the posters who had helpful comments.

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