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    4 rechargeable AA batteries to standard USB power line

    basically, i bought this $5 worth of battery holder that is supposed to connect to USB to power some of my devices (basically, a backup source). i already have 4, 3800 mAh AA Ni-MH batteries (or so the label says), so i was like cool. but the thing is the battery holder doesn't really work. so...
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    NC switch with time delay

    i'm looking for a component that is normally closed, but when voltage/current is applied to the gate/trigger, it will: 1) open the load (turn it off) 2) keep it open while the current/voltage is applied to the gate at *around the same amount* of trigger current/voltage 3) keep it open for a few...
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    toner transfer from Orcad PCB Design

    new to de forum guys! neways, so i started teaching myself EDA and specifically designing pcbs. the software i'm using is Orcad PCB Design. so when i'm finished with a project and want to etch it, i'll be transferring it to the pcb using the toner transfer method. but i'm not really sure as to...
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    lookin' 4 switch with reset

    hi y'all! new to the forum. so i'm looking for a push button that when i press it, it goes on then again goes of. but then has an extra pin that when current is applied, it turns off whatever the previous state was.
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