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  1. B

    triac based 50v to 110v battery charger

    Just be aware that in most countries your heritage railway workshop may come under the scrutiny of gov safety officers and as such, equipment used therein may require certification by qualified personel.
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    Correct name for push button switch

    I think the OP is looking for a normally closed push button.
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    Shaded Pole Fan Motor - Speed Control Question

    Shaded pole motor speed is frequency dependant. To answer your queries, any mods you suggest will probably damage the motor in some way, either heat destroying the coil , dry out the bearings and sieze.
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    Audio Circuit too sensitive

    As Bob says, you are probably overdriving your amp with the input signal.
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    Using 2x30A breakers on AC main (neutral and hot), will they trip at 30A or 60A?

    If boat is a steel hull then neutral would be bonded there along with any earth from the gen set and any other metal also. If timber, not much point Boats are usually all double pole switching as shore power may be supplied via flex lead with possibility of a and n being transposed.
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    Learning Unijuctions

    True.....I did notice that also.
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    Using 2x30A breakers on AC main (neutral and hot), will they trip at 30A or 60A?

    It's a double pole breaker, meaning it will break all supply conductors under any fault condition @ 30 Amp (depending on whatever curve condition it comes under.) By that it means there are several types of 30 amp breaker with differing fault curves and characteristics.
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    Learning Unijuctions

    C1 looks right to me but R3 definetely not correct.
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    Power supply can't get zero volts

    Op amp operation needs in many instances to operate from a split supply in order for the output to get down to 0 volts. Many years since I did the explanation on this so others will be able to give you the exact reasons why.
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    Maximum socket outlets

    No ring main in Aus M. There is no maximum number of single phase general purpose outlets for a given circuit size cable. Used to be in the days of fuse protection. Circuit breaker becomes one limiting factor which now must include safety switch protection. The more important factor to...
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    Control for inverter on work truck

    Can you draw the circuit as it would be much easier to understand.
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    Whats a good electric meter ?

    Nothing wrong with cheaper range of meters. It really depends on what catagory meter you require to begin with.
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    Precision Variable DC Power Supply Question

    Fairy dust works better. Do you have a link??
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    The collapse of a magnetic field

    What happens if you bridge out switch 2?
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    Need Help with oven control board transformer

    Don't know if it helps but apparently Maytag use the same board. http://picclick.ca/maytag-oven-Electronic-Control-Board-BE26924001-Basler-112220811805.html
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    No sound from radio speaker, but can hear from headphone jack

    1......First you need to be proficient with the use of a multimeter and some circuit tracing skill. Without this you will be lost. 2......Next it would be necessary to determine if this is indeed where the fault lies. 3.... If it proves to be the case then bridging it out would suffice...
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    No sound from radio speaker, but can hear from headphone jack

    Headphone jacks usually have a switching mechanism which isolates the main amp when headphones are in use. Perhaps this switching mechanism is not returning the signal to the main amp after the headphones are removed.
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    Need a 15Wh battery that can charge in 20 minutes

    Chargers used for radio control equipment have a broad range in many aspects. Although 5v might be a bit odd there.
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    Recent posts

    mmmm...yes...seems to be only on the mobile phone.
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    Recent posts

    What has happened to recent and new posts heading?
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