LED Indicator wiring help

Thread Starter

Fanfire174

Joined Mar 13, 2018
233
I have led-indicator-k50lgra1yp (green-red-yellow-audible-indicator) I want to interface with microcontroller but I decided to test it with 24 V DC supply

I am connecting pin 1 of indicator to positive of 24 V Dc and pin 3 of indicator to negative of 24 power supply

I have attached datasheet, How to test all colors ?

upload_2019-1-14_14-6-45.png

Thanks and best wishes
 

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ericgibbs

Joined Jan 29, 2010
9,383
hi 174,
You will need a transistor drive for each LED pin.
The MCU would drive the transistor Bases with say 5V, via a base resistor.
The transistor Collector would pull the LED pins Low.
Which MCU and programming language are you planning to use.?
E
 

Thread Starter

Fanfire174

Joined Mar 13, 2018
233
hi 174,
You will need a transistor drive for each LED pin.
The MCU would drive the transistor Bases with say 5V, via a base resistor.
The transistor Collector would pull the LED pins Low.
Which MCU and programming language are you planning to use.?
E
I am planning to use 8051 and c language

How to check indicator with 24 V DC manually

only RED light is ON

upload_2019-1-14_14-31-41.png
 

Thread Starter

Fanfire174

Joined Mar 13, 2018
233
hi,
For a manual check, just connect a LED pin to the 0V of the 24V supply.
Is that what you are asking.?
E
If I am connecting pin 1 of indicator to positive of 24 V Dc and pin 3 of indicator to negative of 24 power supply, only red light become ON

and if I am connecting pin 1 of indicator to positive of 24 V Dc and any pin 4, 2, 5 of indicator to negative of 24 power supply. I don't get any indication
 
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