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    Why nobody reconditions a UPS battery

    Hello, I tried to find some information why nobody tried to recondition not dead (no sulfation) but used CSB UPS battery for example the common type 12Ah. You could measure the electrolyte with a reflectoemter, you need only 1 drop. Then you could add water or acid to it. The actual acid...
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    Impulse DIY fuction for cordless screwdriver power tools

    Here is schematic I've built using google and some information about MOSFET drives on vibration motors, should apply to DC motors too. Any suggestions, improvements? I need to select component values that is safe to use, any suggestions? The drill switch is rated at 12A 24V, the battery is...
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    Impulse DIY fuction for cordless screwdriver power tools

    Did you see the video? That is motor being turned on and off, the power on switch like on any drill control the speed - torque. The more you push the switch the more the drill turns in pulsating action that is longer because speed is higher. It is not soft starting the motor, you can see...
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    Impulse DIY fuction for cordless screwdriver power tools

    AFAIK the motor controller is in the switch of the screwdriver, it is very small and I think they build them to not be serviceable to protect from dust etc. Why not use a MOSFET on motor or battery pack with 555 timer it would be easy ?
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    Impulse DIY fuction for cordless screwdriver power tools

    Hello, I have an idea to make the impulse function on a makita brand cordless screwdriver. It is very handy to unscrew old bolts, or to drill to shiny surfaces like tiles. Unfortunatelly the impulse is metabo "inovation" - if you can call pulsed power to the motor innovation. It is...
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