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Visit Gateway Electronics:
2220 Welsch Industrial Court
St. Louis, MO 63146


LED TIP CARD

LED RESISTOR CHART

Series resistor value required to use with LEDs for specified voltages
listed below and typical operating currents.


INPUT VOLTAGE DC

STANDARD LEDs

2 VOLT

BLUE LEDs

3.2 VOLT

BLINKING LEDs 5 VOLT

10mA

20Ma

20mA

20mA

3V

100 OHMS

47 OHMS

NO RESISTOR

--

5V

300 OHMS

150 OHMS

100 OHMS

NO RES.

6V

390 OHMS

180 OHMS

150 OHMS

NO RES.

8V

560 OHMS

300 OHMS

220 OHMS

NO RES.

9V

680 OHMS

360 OHMS

300 OHMS

NO RES.

12V

1 K

510 OHMS

470 OHMS

100 OHMS

15V

1.2 K

680 OHMS

620 OHMS

470 OHMS

18V

1.5 K

820 OHMS

750 OHMS

680 OHMS

24V

2.2 K

1 K

1 K

1 K

 

NOTE: all resistor values are watt.
Most LEDs operate at 2 VDC @ 10-20 mA.

Never operate any LED without using a series resistor, unless specified,
or damage to the LED may result!

 


2220 WELSCH INDUSTRIAL COURT * ST LOUIS, MO 63146
PHONE (314)427-6116 * FAX (314)427-3147

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