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

Product ID: 378497542

Details

Brand
MCIGICM
Educational objective
STEM
Item weight
0.03 Kilograms
Set Name
MCIGICM 100 5
Theme
science

⚡3V-3.2V forward voltage (W/G/B)

💡100 pcs multi-color LEDs

🔋20mA max current

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Description

💡 Light up your genius with every color in the spectrum!

STEM READY POWER - Optimized voltage and current for safe, reliable experiments
PLUG PLAY SIMPLICITY - No assembly needed—just light up your creativity instantly
BRIGHT DURABLE DESIGN - Clear round heads ensure maximum visibility and secure mounting
VIBRANT 5 COLOR SPECTRUM - White, Red, Green, Blue & Yellow LEDs to electrify any project
VERSATILE INNOVATION TOOLKIT - Perfect for DIY, school science, car décor, and signal indicators

The MCIGICM 100-piece 5mm LED assorted kit offers a vibrant mix of five colors (White, Red, Green, Blue, Yellow) with optimized forward voltage (2-3.2V) and max current of 20mA. Designed for STEM projects, DIY electronics, and creative experiments, these bright, durable LEDs require no assembly and deliver reliable performance for professional and educational use.

Specifications

ASIN	B07PG84V17
ASIN	B07PG84V17
Brand Name	MCIGICM
Customer Reviews	4.5 4.5 out of 5 stars (1,675)
Customer reviews	4.5 4.5 out of 5 stars (1,675)
Date First Available	12 June 2019
Educational Objective	STEM
Is Assembly Required	No
Item Weight	0.03 Kilograms
Manufacturer	MCIGICM
Manufacturer	MCIGICM
Material Type	copper
Number of Items	100
Number of Packs	5
Package Dimensions	9.6 x 9.5 x 1.7 cm; 32 g
Set Name	MCIGICM 100 Pieces Clear LED Light Emitting Diodes LED Assorted Kit 5 Colors 5 mm
Theme	science
UPC	727040387167
Unit Count	100.00 Count

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NT$957

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Sold byAmazon TaiwanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Desertcart purchases this item on your behalf and handles shipping, customs, and support to Taiwan.

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TrustScore 4.5 | 7,300+ reviews

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