12v to 24v led?

[AC]

can i parallel 2pcs 12v led bulbs to be used on 24vtrucks?

[rmsoriano]

can i parallel 2pcs 12v led bulbs to be used on 24vtrucks?

the connections are correct, and it will light the LEDs without any problem,..... by the way, the connection is not parallel, they are connected in series....HTH
...

[rmsoriano]

one more thing, series connections of two 12v lights can only be done and connected to a 24 volts source as long as the 2 bulbs are identical, meaning, same voltage and wattage rating, or else, if they have different ratings, one will get easily busted after a few minutes of having them energized....

[CVT]

Although it will light up, it is not recommended.

Because you are not sure that the LED bulbs have exactly the same resistance values..

In which case, you are not certain of the voltage across each of them.... One may be at 10V, the other at 14V, as an illustration (and maybe exaggerated to highlight the point), because they have different resistance values.

So, the second LED is over-voltaged and therefore, overstressed. And consequently, it will reduce its operating life.

18.3K:tomato:

[confused shoes]

can i parallel 2pcs 12v led bulbs to be used on 24vtrucks?

Just wondering, you have two 12v batteries and two 12v LED lamp, why not just connect the 12v LEDs to the 12v batteries, directly? Anyway, you can do that without any problem. And by the way, that is not parallel connection, it is series.

[red_one]

^probably because the current positive (+) electrical wiring are tapped to Battery 2. and you would need to lay-out new wires for connection to either Battery 1 or Battery 2 directly.

in any case, if you can connect the 12V LEDs directly to the 12V batteries, then that would be preferred.

[joemarski]

hmmmn... i just can't help but ask...
will the other bulb still light if the other bulb is busted?
if ever, can it withstand twice its rated voltage?

[babynos01]

hmmmn... i just can't help but ask...
will the other bulb still light if the other bulb is busted?
if ever, can it withstand twice its rated voltage?

If naka series, kapag busted na yung isa, hindi na iilaw yung another one kahit hindi siya busted.

[stickers]

hmmmn... i just can't help but ask...
will the other bulb still light if the other bulb is busted?
if ever, can it withstand twice its rated voltage?

nope both LED wont light up. yan disadvantage ng series connections.

[AC]

yes.. series.. hehe mali naisip kong parrallel...

mura po kasi ngayon strip led lights and want to put some sa likod ng truck.. as tail light... katuwaan lang.. hehe pati sa sides siguro imbis na regular bulbs na ginagamit namin..

thanks for the replies.. naintindihan ko na.. hehe pag medyo iba ng konti ang resistance iba din ang distribution ng voltage.. hehe
so they have to be exact equal..

hindi po pwede 1 battery lang na 12v.. actually medyo mali yung diagram ko... hehe sa output po kasi ng truck.. like tail lights mga ganun... 24v talaga and dun ko lang po itatap.. sa tail lights hindi sa battery directly.. thanks for your replies guys:D

[yapoy86]

the best way is to add a resistor in series to each bulb.. nalimutan ko na yung resistor value pero yun ang tama...

[joemarski]

thank you sa mga sagot sirs.
so. it's better to have the bulbs connected in PARALLEL. mapundi man 'yung isa, sindi pa rin
'yung isa, kasi nga the same voltage (12V) will still pass thru.
experience ko kasi dun sa Lolo 2002 XUV namin. 'yung ibang LED Lamps sa 3rd
Brake Lamps (spoiler ba tawag doon?) eh pundi na. dinala namin sa Isuzu Casa.
Sabi nung SA, di raw sila nagre- repair ng ganun. papalitan daw 'yung buong "spoiler".
about 20K petot daw 'yun. wala rin silang stock.
so, returning to house, binaklas ko spoiler, inalis ko two bulbs na pundi. went to raon.
marami sa raon, same look, pero iba- iba ratings (voltage and ampere raw). eh hindi ko rin alam.
SA asked "saan mo ba gagamitin sir? "sa isuzu van" sabi ko. ang bilis ni Tita. "PARALLEL connection lang 'yan,
12volts 'yan, 15petot isa sir, ilan ang kukunin niyo?" buy ako 20pcs = 300petot... so, tralala... so and so...
went home... kabit the other day by an appliance tech (P200 + 1 kaha Philip),
good as new... hahaha! imagine, muntik pa ako madale ng P20K sa Casa ah.

[stickers]

thank you sa mga sagot sirs.
so. it's better to have the bulbs connected in PARALLEL. mapundi man 'yung isa, sindi pa rin
'yung isa, kasi nga the same voltage (12V) will still pass thru.
experience ko kasi dun sa Lolo 2002 XUV namin. 'yung ibang LED Lamps sa 3rd
Brake Lamps (spoiler ba tawag doon?) eh pundi na. dinala namin sa Isuzu Casa.
Sabi nung SA, di raw sila nagre- repair ng ganun. papalitan daw 'yung buong "spoiler".
about 20K petot daw 'yun. wala rin silang stock.
so, returning to house, binaklas ko spoiler, inalis ko two bulbs na pundi. went to raon.
marami sa raon, same look, pero iba- iba ratings (voltage and ampere raw). eh hindi ko rin alam.
SA asked "saan mo ba gagamitin sir? "sa isuzu van" sabi ko. ang bilis ni Tita. "PARALLEL connection lang 'yan,
12volts 'yan, 15petot isa sir, ilan ang kukunin niyo?" buy ako 20pcs = 300petot... so, tralala... so and so...
went home... kabit the other day by an appliance tech (P200 + 1 kaha Philip),
good as new... hahaha! imagine, muntik pa ako madale ng P20K sa Casa ah.

Alam nyo naman ang casa, konting gasgas, palit na buong kaha.. pundi isang ilaw palit buong assembly.. hehehe.
270 ohms ginamit ko sa 2 pcs LED strips connected parallel.. medyo malabo buga nya compared sa w/o resistor pero at least mas tatagal yung buhay ng LED proteksyon sa sudden voltage surges.

[CVT]

yes.. series.. hehe mali naisip kong parrallel...

mura po kasi ngayon strip led lights and want to put some sa likod ng truck.. as tail light... katuwaan lang.. hehe pati sa sides siguro imbis na regular bulbs na ginagamit namin..

thanks for the replies.. naintindihan ko na.. hehe pag medyo iba ng konti ang resistance iba din ang distribution ng voltage.. hehe
so they have to be exact equal..

hindi po pwede 1 battery lang na 12v.. actually medyo mali yung diagram ko... hehe sa output po kasi ng truck.. like tail lights mga ganun... 24v talaga and dun ko lang po itatap.. sa tail lights hindi sa battery directly.. thanks for your replies guys:D

Bro.,- "Some animals are more equal than the others"....

Same is true with electronic components, walang exactly pareho... Araw-araw na-e-encounter namin iyan dito sa opis....

In your case, it may take a while for an LED to burn-out, even if it has more than 12V across.... I suggest you experiment first....

18.3K:tomato:

[Retz]

balikan ko nga ang ECE 101.

[AC]

thanks sa suggestion sir yapoy.. mukhang yan nga po dapat kong gawin..
anybody here knows anong ohm ng resistor dapat ikabit and how? hehe

sir cvt kung ganun mukhang resistor nalang nga magagawa ko.. hehe... thanks

thanks guys

[red_one]

^check the spec of the LED strip. pwede mo gamitin ang Power (Watt) or Current (Ampere) or Resistance (Ohm) rating. or use Ohmmeter.

meron kang 24V source. dapat ang Resistor ay equal or close to the value ng Resistance ng LED strip. example, if 300 ohms ang LED strip, you need a 300 ohms resistor to connect in series.

Voltage Divider lang yan kaya saktong 12V ang makukuha ng LED strip.

[AC]

naku sir.. hehe mental overload.. hahahaha... still thanks for trying to explain.. i will ask ece friends.. baka alam.. hehe

[confused shoes]

thanks sa suggestion sir yapoy.. mukhang yan nga po dapat kong gawin..
anybody here knows anong ohm ng resistor dapat ikabit and how? hehe

sir cvt kung ganun mukhang resistor nalang nga magagawa ko.. hehe... thanks

thanks guys

LED strips are cheap. You can try. You may connect them directly to the 24v.

[AC]

so they may work sa 24v?