Ana içeriğe geç

Repair information for the Mophie PowerStation 5X portable charger. Model numbers: PWRSTION-10K-ALM, MOPPS10KSLVV1. Released ~2016.

4 Soru Tümünü görüntüle

2 x 4.5 volt units, and 1 x 9 volt DC power block

As the title says, I have two 4.5 volt LED light strips (each one originally ran off 3x1.5 AA batteries). Can I use one 9 volt AC-to-DC power supply (wall wart type) to power these?

If so, do I wire these lights in series, or parallel?

Thanks!

Yanıtlandı! Cevabı görüntüle Ben de bu sorunu yaşıyorum

Bu iyi bir soru mu?

Puan 0
Yorum Ekle

2 Cevap

Filtre ölçütü:
Seçilen Çözüm

Keep your 9V AC adapter. Connect your LED strips in series. Use a resistor from your adapter to the LED strips.

You do need to know what LED's you have and how many. Typical values for LEDs are:

Red LED: 2V 15mA

Green LED: 2.1V 20mA

Blue LED: 3.2V 25mA

While LED: 3.2V 25mA

To figure out the size of the resistor use R = (V1 - V2) / I

R=(9-4.5)/I

(9-4.5)/0.02

4.5/0.02=225 ohms (easiest available resistor would b a 230ohm resistor)

Or you can use this calculatorto figure out how to wire it by using resistors.

Bu yanıt yardımcı oldu mu?

Puan 2

3 Yorum:

the resistor values given are quite not right.in series connection , the current through one led passes through the rest of the leds.so the current stays constant.[inthis case 20mA.

tarafından

@renre thank you and it has been corrected

tarafından

Remember that a resistor will dissipate some power, perhaps as much as your LED strip [constant 20mA current x (9-4.5)V=90mW; 1/8W should be fine] so always check the power rating of a resistor before finishing your design.

It's worth trying both strips in series, (+)-[strip]-(-)(+)-[strip]-(-); if they have some internal current regulation, you may not need more at all.

tarafından

Yorum Ekle

Connection will be in series

Bu yanıt yardımcı oldu mu?

Puan 1

2 Yorum:

Would you anticipate problems doing this? Would it be better to use TWO separate power supplies, 4.5 volts each?

tarafından

No as long as you connect in the series no problems ..... resistance = V/Amps if you want can add a resistor , considering current 40ma for 2 led strips ....

tarafından

Yorum Ekle

Yanıtını ekle

Nicholas Kormanik sonsuza kadar minnettar olacak.
İstatistikleri Görüntüle:

Son 24 Saat: 0

Son 7 gün: 0

Son 30 gün: 3

Her zaman: 734