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Recent content by SDW

  1. S

    Lead-Acid battery charger using pc power supply unit

    Hi Guys, Over the weekend I needed to charge my sealed lead acid car battery, so I quickly whipped up the following circuit. the +18v was from a laptop switching power supply. The 10K VR adjusts the pulse width of the signal to the mosfet via NPN transistor which is at about 2khz. I put a DMM...

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