What are the resistances for each colour of the LEDs?

To calculate the resistor you need to use for an LED: take your supply voltage, subtract 1volt for the drop over the LED (actually 0.7-1.5 v typical) then divide that figure by .015 amps. (15mA is usually very bright). That figure is the resistor value. Lots of tolerance upwards from that value. (e.g if supply is 12 volts, to run an LED try 11/.015= 733 ohms or more (nearest available resistor value is 820 ohms)

Can you provide 24vdc to these LED's?

Yes but you need the original voltage and current for the LED -OR- a resistor box to bring the voltage up from 0 vdc to the full bright voltage level that is safe for the LED. With that and using Ohm's Law or E=IR you can figure out the value of the Dropping Resistor you will need for a 24 vdc supply.

I am using these to back light a clock. i hooked one of them up to a 9v battery. it fried it. will it stop the frying the bulb if i string 4 or 5?

Sounds like you want to string these in series. Add up each LED voltage rating for the color LED and if is equal to or greater than 9v you should be ok. EG: 2.2 + 3.2 + 2.2 + 3.2 + 2.2 = 10.8v should be ok.

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(100 Pcs) MCIGICM 5mm LED Light Diodes, LED Circuit Assorted Kit for Science Project Experiment (Multi-Colored - 5 Color)

(100 Pcs) MCIGICM 5mm LED Light Diodes, LED Circuit Assorted Kit for Science Project Experiment (Multi-Colored - 5 Color)

Product ID: 417776897

Details

Brand
MCIGICM
Educational Objective
STEM
Item Weight
0.03 Kilograms
Size
5mm
Theme
Physics

⚡Low forward voltage (2-3.2V)

💡100 pcs multi-color LEDs

🔧Ready-to-use 5mm round LEDs

NT$194

Duties & taxes included

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Sold byAmazon TaiwanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💡 Light up your innovation — don’t let your projects stay in the dark!

REVIVE INNOVATE - Trusted by makers to repair and upgrade LED strings, bringing old tech back to life.
PERFECT STEM COMPANION - Ideal for science experiments, DIY electronics, and educational projects that impress.
PLUG PLAY CONVENIENCE - No assembly required—just grab, connect, and watch your ideas glow instantly.
VIBRANT 5 COLOR SPECTRUM - White, Red, Green, Blue & Yellow LEDs to electrify your projects with vivid hues.
ENERGY EFFICIENT BRILLIANCE - Low forward voltage and 20mA max current ensure bright light without draining power.

The MCIGICM 5mm LED Light Diodes Kit includes 100 multi-colored LEDs (White, Red, Green, Blue, Yellow) designed for easy integration into DIY electronics, STEM experiments, and decorative projects. With low forward voltage (2-3.2V) and a max current of 20mA, these durable round LEDs deliver bright, energy-efficient illumination. Perfect for professionals and hobbyists alike, this kit requires no assembly and is highly rated for quality and versatility.

Specifications

ASIN	B07PG84V17
Best Sellers Rank	#100,838 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #469 in Diodes
Brand	MCIGICM
Country of Origin	India
Customer Reviews	4.5 4.5 out of 5 stars (1,906)
Educational Objective	STEM
Is Assembly Required	No
Item Weight	0.03 Kilograms
Manufacturer	MCIGICM
Material	copper
Number of Items	100
Number of Packs	5
Size	5mm
Theme	Physics
UPC	727040387167
Unit Count	100.00 Count

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