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Using Arduino => General Electronics => Topic started by: V4D3R on Aug 17, 2019, 04:51 am

Title: Is this circuit correct?
Post by: V4D3R on Aug 17, 2019, 04:51 am
Just need to know if this circuit is correct. Making a 4 bulb lamp and needed to wire everything in parallel. (https://imgur.com/Ql1MDXx)
Title: Re: Is this circuit correct?
Post by: KASSIMSAMJI on Aug 17, 2019, 05:14 am
what's up with lamp3 and 4 having 0 ohms of resistance ?
Title: Re: Is this circuit correct?
Post by: SteveMann on Aug 17, 2019, 05:49 am
The zero-ohms makes no sense, but this is how lights are wired in parallel.

I can't tell from your drawing what is the power source.  120VDC ??
If the lamps are truly zero ohms, expect lots of smoke.
Title: Re: Is this circuit correct?
Post by: Nikosant03 on Aug 17, 2019, 02:25 pm
Lamps are loads and each load has some kind of Impedance= Resistive + Inductive. In your case, the lamps are resistive loads (with a really small value of resistance) that dissipate energy (this energy converted into heat and light). The zero ohm resistance indicates a short circuit between the positive and negative side and this will leed into a smoky situation.  8)

So if you want to simulate your circuit in terms of power dissipation, current consumption, voltage drop, etc you need to take into account this resistance.

I am not sure what the PWL and CSV stand for but as SteveMan pointed, 120VDC it's a kind of strange. May you need to replace your power source with an AC one?

The parallelization is correct
Title: Re: Is this circuit correct?
Post by: TomGeorge on Aug 17, 2019, 03:57 pm
Hi,
OPs circuit;
(https://forum.arduino.cc/index.php?action=dlattach;topic=631811.0;attach=320722)

If they are all 120V bulbs then this config will be okay.
Some incandescent bulbs measure near zero ohms when measured with a multi-meter and COLD.
Their resistance increases as they heat up and glow, hence you usually have  HIGH instantaneous switch on current.

Tom... :)
Title: Re: Is this circuit correct?
Post by: V4D3R on Aug 17, 2019, 05:14 pm
what's up with lamp3 and 4 having 0 ohms of resistance ?
Sorry that was just a mistake in the drawing. Disregard the 0 ohms. Also the power source is 120v AC
Title: Re: Is this circuit correct?
Post by: GaryP on Aug 18, 2019, 10:12 am
Disregard the 0 ohms. Also the power source is 120v AC
So disregard "Negative" and "Positive" as well.

Cheers,
Kari

Title: Re: Is this circuit correct?
Post by: awesome_tornado on Aug 19, 2019, 12:18 am
I don't see any reason why that wouldn't work