# Removing LEDs from relays

**URL:** <https://forum.core-electronics.com.au/t/removing-leds-from-relays/8507>\
**Category:** Support\
**Created:** [2 October 2020 04:07 UTC](https://forum.core-electronics.com.au/t/removing-leds-from-relays/8507 "2020-10-02T04:07:16Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![TheComputerGuy1321](https://avatars.discourse-cdn.com/v4/letter/t/97f17d/32.png) [@TheComputerGuy1321](https://forum.core-electronics.com.au/u/TheComputerGuy1321)\
**Post date:** [2 October 2020 04:07 UTC](https://forum.core-electronics.com.au/t/removing-leds-from-relays/8507/1 "2020-10-02T04:07:17Z")

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Hi.  
Will the following 2 relay modules still work if I desolder the LEDs from them?

> **[5V 2 Channel Relay Module 10A](https://core-electronics.com.au/5v-2-channel-relay-module-10a.html)**
>
> A versatile relay board with opt-isolated inputs. Each channel can drive up to 10A @28VDC

  

> **[Pololu Basic 2-Channel SPDT Relay Carrier with 5VDC Relays (Assembled)](https://core-electronics.com.au/pololu-basic-2-channel-spdt-relay-carrier-with-5vdc-relays-assembled.html)**
>
> The Pololu basic 2-channel relay carrier modules allow simple, independent control of two single-pole, double-throw (SPDT) switches from low-voltage, low-current control signals. This item includes the basic carrier PCB with two soldered-in 5 V...

  
Thanks, Alex.

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**Author:** ![Owen](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/owen/32/2948_2.png) [@Owen](https://forum.core-electronics.com.au/u/Owen)\
**Post date:** [2 October 2020 06:10 UTC](https://forum.core-electronics.com.au/t/removing-leds-from-relays/8507/2 "2020-10-02T06:10:09Z")

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Hey Alex,

Removing the LEDs may cause one or two issues. The optocouplers require a certain current through their LEDs to turn on correctly. The manufacturer of the board will have designed it so that the combination of a 1K resistor and an external LED results in the correct current.

You could replace the LEDs with resistors. But you would have to choose resistors that give the same current as before. The end result is just as much current draw, and no indicators to tell you which outputs are on.

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**Author:** ![TheComputerGuy1321](https://avatars.discourse-cdn.com/v4/letter/t/97f17d/32.png) [@TheComputerGuy1321](https://forum.core-electronics.com.au/u/TheComputerGuy1321)\
**Post date:** [2 October 2020 06:26 UTC](https://forum.core-electronics.com.au/t/removing-leds-from-relays/8507/3 "2020-10-02T06:26:41Z")

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Thanks Owen.