Wiring up an LED moonlight?

[briareos]

I'm interested to DIY a moonlight with blue LEDs. Suppose I get 10 blue LEDs, and I have a 12v power supply.

How do I calculate the resistor value to use, and do I connect the LEDs in series or parallel?

[Tanga]

Bro DIY set sold at SLT for $20 they comes with manual and everything

[Maxstar81]

Get the pre-fixed set.

Just need connect to adapter can use liao.

[zoren]

er, wats SLT ?

[etnies]

Sim Lim Tower

[d88p]

any idea which shop is it?

[Oceandeep]

u need to measure the volt from the adpator first.

[Oceandeep]

then base on 1 blue led need 3 volt, calculate how many led u need.

connect them in series...

[ah_d3x]

u should connect them in parallel cause even if one blows the others still can work... if in series circuit one blows means all cannot light up liao.

[Oceandeep]

LED wouldnt blow so easily. As long as the current and volt is within

limit.

[cdckjn]

I hope that this helps, this is confirmed after some discussion with a vendor at the electronics shop at Sim Lim Tower.

The price of the LEDs will drop when you purchase in bulk (30-100pcs for example) but for most of us, 10 LEDs is already a lot (nano or pico tank).

Happy DIYing.

LED_connection.doc

[briareos]

How much are normal blue LEDs? I remember last time they cost a lot more than the red ones.

[briareos]

Ok, need help here boys.

I went to SLT and they had 2 kinds of blue LEDs - 4.5v and 6v. I got 9 4.5v types, and 3 120 ohm resistors.

Can I wire these according to the diagram given on page 1, and connect it to a 9v PSU? Or do I need a 6v PSU for it now?

[Bernard]

I hope that this helps, this is confirmed after some discussion with a vendor at the electronics shop at Sim Lim Tower.

The price of the LEDs will drop when you purchase in bulk (30-100pcs for example) but for most of us, 10 LEDs is already a lot (nano or pico tank).

Happy DIYing.

MAy I check with you if there's any directional for the resistor and is there any positive and nagative for the LED? Planing to DIY but not sure about electronic. Thanks.

[cdckjn]

Ok, need help here boys.

I went to SLT and they had 2 kinds of blue LEDs - 4.5v and 6v. I got 9 4.5v types, and 3 120 ohm resistors.

Can I wire these according to the diagram given on page 1, and connect it to a 9v PSU? Or do I need a 6v PSU for it now?

Yes, just follow the circuit diagram and it should be fine.

Yes also to you LED has a positive and negative, how you identify is that if you observer closely, the LED is round but there is a little flat part, the flat part is the thick black line (the LED symbol), the other way to confirm is to solder wires to the LED then use a 9V (if yours is a 4.5V) then just tap to test if it lights up (of course positive to negative of the battery), in this way, you can confirm the setup.

Happy DIYing.

[firestream]

I wonder anyone try the 1 watts blue LED ..

The viewing Angle: 140 Degree, which look more like a moon light ..

http://www.besthongkong.com/product_info.p...052a5639df2dc74

[Bernard]

Yes, just follow the circuit diagram and it should be fine.

Yes also to you LED has a positive and negative, how you identify is that if you observer closely, the LED is round but there is a little flat part, the flat part is the thick black line (the LED symbol), the other way to confirm is to solder wires to the LED then use a 9V (if yours is a 4.5V) then just tap to test if it lights up (of course positive to negative of the battery), in this way, you can confirm the setup.

Happy DIYing.

Thanks great info.

Now have to figure out how to lay out the LED to make it evenly shine in the tank.