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    NPN transistor substitute

    Usual approach is to go higher not lower, in specs. Then again, it all depends on the application, which is not shown. Best advise under those conditions, suck it and see....2cent part.
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    Removing Components for Testing versus On Board Testing

    Don't know why you arrive at this conclusion..............which way is "backwards"..?? At that time one is assuming "the problem" is not known for one thing. Doesn't make any sense.
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    Giant Magnet Question

    The steel casing becomes a shield. First thoughts...OMG, another Macgiver.....world canot handle two...o_O In simple terms, no work.......
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    Stairs light Timer

    Your reply makes no sense........ go with #4.
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    HELP! Issues with Lighter Heating Coil

    Breadboards and "smoke alarm" batteries were never made for high current circuits. Those thin as hookup wire either BTW....or tactile switches.........:oops:
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    Dc step up

    Can you supply the data sheet you refer to and a wiring diagram of your setup. We do not have a need to go searching all over for it or second guessing how you want to connect everything.
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    How to control the HV converter with analog voltage signal

    yes, I ammended my answer afterwards but for some reason ( gremlins) it didn't go through.
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    Will cleaning help?

    As above, assume a mechanical selector switch............
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    Will cleaning help?

    General electrical contact cleaner form electronics stores........ that or (some may grumble) crc or wd40.
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    How to control the HV converter with analog voltage signal

    Where did you connect 24v supply..???
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    Yaw Sensor Required for Wheeled Odometry System

    Perhaps look at MPU6050 and Arduino pro mini.
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    Converting frequency on US devices (60Hz - 50Hz)

    For the last time, your problem is the voltage conversion which is a right pia costly process and not worth the effort. The frequency change won't be a problem compared to the former.
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    help finding a micro controller

    If nothing else faulty caused it to blow it's top in the first place............ You may also (more than likely) find it difficult and damaging to the pcb to unsolder without the proper tools. Startout tip would be to flood the pins with a good flux and some 60/40 solder then remove with a good...
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    LED Supply Mounting

    Most install near a downlight in the ceiling, easy to access.
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    Wanted: Mobile sound effect playback

    You might be pleasantly surprised if anything like the ones I've seen.
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    Wanted: Mobile sound effect playback

    There are small units available (around 25mm square) which will bluetooth to your phone. Many use them in model trains etc.
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    Converting frequency on US devices (60Hz - 50Hz)

    Air saloon...????? Buy a new one.........locally.
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    Learning Electronics for Everyday Practical Reasons Non-Professional

    Don't have the time or the need to study the differences....at any rate, it would be safe to say it will make zero difference to you currently anyhow...just being realistic. Let us know what you find...that's normally how it works my end at least.
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    4s lithium ion 16850 batterypack bms, charger, discharge.

    Well, so sad to disappoint you but yes, I do have the knowledge. No Yes Yes, plus ideally the same Ah . There you go then, chew on that.
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