need help creating a simple circuit.

[gamernixin]

Hi everyone, i'm pretty new to electronics and i have a question.


Well first of all, i made a simple light circuit with 10v bulbs. and as i don't have any resistors i took my old phone charger wich outputs 4,9v. Connecting it to the outlet, i figured that the lights don't get enough power.

but if i were to remove the charger and make a normal plug for it, i suppose all the bulbs would be burnt, as the outlet gives 230v.

so what can i do to make this work?

- Thanks in advance.

-- sorry if my english isn't easy understanding. I'm a dane

[Hero999]

Yes, you're right, the charger doesn't have a high enough voltage and mains voltage is too high so the bulbs will be destroyed.

How many bulbs are there?

What's their Wattage or current rating?

You need a transformer, 9V will probably do.

[gamernixin]

I got 5 bulbs, and the bulbs are like this:
E-10 \ 10V \ 50 mA \ 0.5 W

Would it matter how i connect the wires whether its serial or parallel?

[Alex Tsekenis]

Hi,

Find a cheap 9V, 10VA or so transformer (maybe one of those that you can choose the output voltage), connect all the bulbs in parallel and then to the transformer. Merry Christmas! 

Alex

[Hero999]

Parallel is best because it means that if one lamp fails, the rest will continue working and you can safely mix bulbs with different power ratings.

Of course you could use a 50V transformer and connect them all in series but you're better off with a 9V/10V transformer and connecting them in parallel.

[gamernixin]

So in serial connections you add all the bulbs voltage, and use that as a pinpoint for power and in parallel you only need the individual bulbs power.

Thanks alot, you have really helped me out

[Hero999]

Not far off, you forgot to say that the power supply needs to be able to provide enough current to the bulbs.

In your case, it needs to be able to supply at lease 250mA, note: it can supply more than that; it doesn't matter if the supply is 9V rated to 300mA.

[eduard0476]

That simple Bro just make it power supply.. buy the the transformer multivolt make your converter power supply to light your 10v bulb and to solve your problem...