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LEDS in parallel circuit help

Crakkers

Jan 26, 2017
5
Joined
Jan 26, 2017
Messages
5
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.
 

Audioguru

Sep 24, 2016
3,656
Joined
Sep 24, 2016
Messages
3,656
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.
 
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