LEDS in parallel circuit help

[Crakkers]

Hi For a school based tech project I need to wire 17 x 3mm colour changing leds (from rapid electronics) together in parallel.

I want to power the circuit with a plug type psu.

I intend to simply wire the legs together via fly leads, unless there is a more efficient way - i am making my own fairly lights, sort of thing.

What voltage PSU can you recommend, I am thinking 9V?

Will I need a resistor to protect the leds? If so, what size and will I need one for each led?

THANKS

c.

 

[sundy]

https://www.electronicspoint.com/th...n-parallel-with-polyswitch-protection.281887/

 

[Crakkers]

Thanks, but that means nothing to me.

 

[davenn]

Hi For a school based tech project I need to wire 17 x 3mm colour changing leds (from rapid electronics) together in parallel.

give a link for these LED's so we know what you are talking about

What voltage PSU can you recommend, I am thinking 9V?

see my previous comment

 

[Crakkers]

give a link for these LED's so we know what you are talking about

Thanks.

The leds are: https://www.rapidonline.com/rainbow-colour-cycling-3mm-led-82702

PSU: https://www.rapidonline.com/Catalogue/Searches?query=variable voltage plug psu&filterSearchScope=1

What do yu think?

Thanks

[Mod note: quoting fixed]

 

[Audioguru]

The LEDs you have are not ordinary LEDs as shown by Sundy. They operate the built-in circuit from typically 4.5V or 5V max. They say if the power supply is more than 5V then a series current-limiting resistor is needed to limit the current to 20mA.