LM393 unused pins Connection

Thread Starter

Khsar

Joined Nov 8, 2019
2
Hi,

I am trying to design a circuit to control the outdoor light on and off using ldr.

I test the following circuit,

light activated circuit des2.png
i used one comparator of lm393.
*should i connect the other input and output pins of the second comparator. or leave them unconnected ?
*should i do any modification on the design?

i used this relay module
gl.png
 

ericgibbs

Joined Jan 29, 2010
9,370
hi khsar,
Welcome to AAC,
You could connect +Vin and -Vin to 0V, leave the output pin open.
Add some decoupling on the 5V supply of the LM393 supply, say 10uF and a 100n

E
 
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