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    LED not working

    Example......... Mouser........ https://au.mouser.com/ProductDetail/JKL-Components/LE-0504-01W Note these already have an integral resistor..........
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    LED not working

    ah well, led down the garden path again....:):)
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    LED not working

    LED's from Ebay or many other may not be the quality you expect. It could be the voltage regulator on your machine is not as good as it should be either. Best bet would be nearest Yamaha motorcycle shop.
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    When the engine starts, sound will come from the mp3 card, and when the engine stops, sound will come from another mp3 card.

    He...she....?? I have been told scateboard riders have nothing between the ears but hearing imparement is a new one.....sounds like a scam.
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    How to set up a Grote 76223 Yellow Two Sealed-Beam Roto-Beacon to run off this 12W Universal AC/DC 12V 6A Power Adapter Wall Charger 5.5 x 2.1mm

    A 12w adaptor (your quote) will be insufficient to drive the required load. I image the load is DC as it is not stated in the spec. only that you are using an AC/DC adaptor. Voltage drop calculators are online where one can work out the Vd over a certain length at a certain load current using...
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    Sharp 173 Photointerrupter

    Be aware there are PNP as well as NPN open collector in the Sharp range.
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    Cardmatic Tube Tester questions

    https://www.telephonecollectors.info/doc//steve-c/100-637-101%20-%20KS-15874-Ll%20CARDMATIC%20Tube%20Tester%20-%20Issue%201%20November%201959%20tci.pdf
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    Repairing old Super-8 camera - DC motor requires help to start

    That would be due to either a fault on the commutator or a bad armature coil.
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    Automatic electric bell using wifi

    I would imagine there would be timers involved on each bell, so drive the bells from the mains and use the mains frequency to regulate the time. Pretty simple system used world wide, no need for internet, uC's and the like. Power failure, use backup, can't be for long. On resumption, timers...
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    Repairing old Super-8 camera - DC motor requires help to start

    Ni-cads and Nickle metal are lower pd which is why I asked. If you have problems with a motor starting on fresh alkaline cells, the former will not help , only make matters worse. Motor speed could be anything and without any working reference, impossible to say. One thing is for certain...
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    LED Lamp solar powered charger conversion

    Cost of running a single light is next to nothing compared to the rest of the house demand. Aside from that, use a 5v plug pack and one of these lithium charge modules....... forget phone charger. https://www.ebay.com.au/itm/296368773085
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    hk lucas 600 poweramp sub

    Original, as I said above.
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    Repairing old Super-8 camera - DC motor requires help to start

    Tantalum caps do not go bad like electrolytics, they merely go bang. When you say motor is 3v yet only gets 2.8v, it appears that may be part of the problem. Brushed dc motors DO get dirty on the commutator so that would be my first bet. What cells are recommended originally and what are you...
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    hk lucas 600 poweramp sub

    The originals first up are high gain darlington....your replacements are not. The originals although obsolete, are still availible apparently in the US and the UK on Ebay at least.
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    old century battery charger transformer leads came off

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    old century battery charger transformer leads came off

    Thanks....I was also referring to the schematic which century sent you............
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    old century battery charger transformer leads came off

    Would be good manners to include it here for the sake of others who may come along with same/similar........
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    LED 1 input 2 output

    Are these LED "pods" something from your imagination ? Otherwise please show some specs/details on them.
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    old century battery charger transformer leads came off

    Looking at the supplied circuit diagram, it's quite a complex arrangement. Normally one would expect to see differing outputs dependant on the secondary taps however this "appears" to have some primary input control. Clearly the four wires in photo 1780 would go to 4 of the 5 terminals on the...
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    Noisy USB outlet? Request for testing help.

    Common knowledge "quality" and "Amazon" should never be used in the same sentence.
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