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    Where to add dimmer in ac led bulb?

    This one explains to a degree. I'd say 3 drivers for 3 internal LED arrangements. Could be paralleled for current. Who knows. With the 3 bridges on the V- output it looks like it might be. Board say 1506x3-150W.....?? Mostly chip is a mosfet. Fairly standard chip design these days for LED...
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    Electronic door lock is safe?

    Electronic locks are largely for use in things like hospitals and government offices etc. to keep the public from certain areas with access via rfid tags for ease of employee entry. In these, the doors open automatically by power down during any fire alarm situation. I can't think of any need...
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    Where to add dimmer in ac led bulb?

    For what you want to do, this statement becomes null and void.
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    Swing Gate Opener Help

    What type of battery..?? Best not to make assumptions, just present the facts. Photos usually help also.
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    convert 3v to 12v?

    There are small voltage boost converter modules for a couple of dollars. Will handle a couple of amps on the output. They say they will operate down to 3v but bear in mind that your AA's voltage will drop below this as they drain down...
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    Fluke 189 multimeter - functions button not working after a short

    Great stuff......must admit it did cross my mind but as that would have been my first check I tended to overlook it. Was also reminded when the video showed the bloke recoating the button but didn't think to mention it. Cheers Jorgo I tend to remind most that electronics are largely fairly...
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    Fluke 189 multimeter - functions button not working after a short

    Something else I found was this video. Now the bloke tends to ramble on a bit and takes ages to get to the point, however, this particular meter had a wallop of overvoltage applied and survived so I actually hold out some hope for your unit. He also mentions a "calibration" routine which I did...
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    Fluke 189 multimeter - functions button not working after a short

    ah..that's bluejets pullleasssseee...left over from flying days...:):) Anyhow, had a good search for a possible schematic without any luck. I did read (skipped through) a 96 page online manual but you probably already have one. I'll stick the link here anyhow...
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    Fluke 189 multimeter - functions button not working after a short

    I take it you meant "in general" selection blue button not working as on diode it switches to cap, not continuity. Sounds like it might have damaged the uC.
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    Help identifying connector

    Could be a mini jst...
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    DIY Metal detector

    Description etc. given in "TalkingElectronics" under the name " Metal Detector Circuits" on the left hand side pull down menu which also describes the BFO which Audioguru refers to. http://www.talkingelectronics.com/te_interactive_index.html
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    Questions lithium polymer battery

    This is going absolutely nowhere ....advice you've been given seems to be ignored.
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    DPDT Switch for Potentiometer/OptoCoupler

    Would be helpful to at least include a drawing of your circuit. Not Fritzing. Any code and details of drivers used for future reference as well.
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    Current Source

    A few others.....https://www.homemade-circuits.com/universal-high-watt-led-current-limiter/
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    On/Off Speaker POP......but only on one channel

    Well, you know it all then. Good luck.
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    Momentary Switch to directional DC motor

    Hevans1944 covered just about every aspect from a uC control , others ave covered other approaches. What you do not seem to be able to accept is there are logically 2 states required in the output. Therefore, which ever approach is used, a 2 state input is required. If one were to toggle...
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    On/Off Speaker POP......but only on one channel

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    On/Off Speaker POP......but only on one channel

    Some of these units if not part of the original gear, apparently use differing turn on voltages to the head unit which can cause your symptoms all-be-it in both at once. Could be a line to follow.
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    Momentary Switch to directional DC motor

    Yes, well, there ya go as they say. These things take time to design and people offer their help to a certain degree but no one I know will design to your requirements for free.
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    Momentary Switch to directional DC motor

    Basic manual F/R shown below. Replace the toggle switch with relay contacts and use 2 push buttons to operate. Wish I could be as sure of winning the lotto that the op wants to do it with one button. Think the Op will have to start opening the wallet soon.
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