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  • How to Make an Automatic 12V Battery Charger

    why do you guys keep praising this guy.... this is not a charging circuit this is just a lab power supply.. you can buy online that he added a volt meter display and a another circuit that is not needed.. this has no intelligent power management meaning its dumping 13.8 volts in and its over filling with amps think of a glass of water unless you shut off the current when it stops taking a charge and reaches that 13.8 volts this is done with math and a ic logic circuit... similar to lipo chargers but charge is on for 30 seconds then off on then off...so this is just another instruct able by an indian guy thats wayy dangerous.. im not trying to be a jerk just showing you all the truth.. reason he put a volt meter display is to watch the voltage get to a set point then shut it off if you ...

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    why do you guys keep praising this guy.... this is not a charging circuit this is just a lab power supply.. you can buy online that he added a volt meter display and a another circuit that is not needed.. this has no intelligent power management meaning its dumping 13.8 volts in and its over filling with amps think of a glass of water unless you shut off the current when it stops taking a charge and reaches that 13.8 volts this is done with math and a ic logic circuit... similar to lipo chargers but charge is on for 30 seconds then off on then off...so this is just another instruct able by an indian guy thats wayy dangerous.. im not trying to be a jerk just showing you all the truth.. reason he put a volt meter display is to watch the voltage get to a set point then shut it off if you forget or walk away .. ever see a lead acid or glass mat explode.. its not pretty and it explodes with the ammount of force of a grenade..you need a circuit that goes from full charge to top off to trickle then float.. and to do this you need inelegance that is nothing more than a lab supply... so stop praising him it should be removed from this site

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  • How to Make an Automatic 12V Battery Charger

    im sorry to say this but this is not a charger... all this is.. is a lab power supply that delievers constant current and voltage there is no chip on the output side that says cut off at 14.4 volts.... even if you place it at 14.4 volts and the battery tops off it will keep charging and charging and then blow up...this has no output protection what so ever so thats why he put a meter on it to see when it gets to the voltage it should be.. dont walk away from this or you will be very sorry

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  • Painting and Finishing EVA Foam and Worbla

    the girl is so pretty any chance shes single>?

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  • JohnD164 commented on dtrewren's instructable Ciclop 3D Scanner (BQ & Horus)2 months ago
    Ciclop 3D Scanner (BQ & Horus)

    anyone know the pinout of the laser and the stepper? what i mean is im trying to avoid buying this kit i have the whole stuff already i just need to know what pins the on the arduino the laser hooks into and what pins the stepper hook into please help me... thanksalso the lenth of the rods anyone know whats what like the lenth of the laser rod? and then the base?

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  • JohnD164 commented on velacreations's instructable Chispito Wind Generator1 year ago
    Chispito Wind Generator

    the thing with this is.. there is no rpm limiter.. so if a high wind comes well those blades break off and can kill someone.. thats why commercial units use a mechanical or electronic rpm hall sensor or some kind of rpm limiter... so i woulndt use pvc blades you can buy blades that are designed for this pvc likes to shater into razors

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  • JohnD164 commented on icecats's instructable Fire Power: Electricity from heat1 year ago
    Fire Power: Electricity from heat

    i dont know where this guy is getting 30 bucks from a peltier cooler is only 6 dollars or less on ebau.. and you dont need a battery holder some rare earth magnets for 1 dollar and some bolts and nuts on the end of the wire then just put on the magnet it will stick to the bolt and stick to the battery ends.. and wire thats lieing around the house.. and heat sink use a old laptop one etc it needs to be fairly big to disapate more heat than its getting or the peltier will be damaged..

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