Flickering LDR sensor light fix?!

Thread Starter

ekremgusani

Joined Mar 20, 2011
157
I bought ldr sensor module on amazon, see photo.
How to fix it not to flicker few minutes before the light is ON?
When is dark the 12v led strip is turned ON by ldr sensor module but every time just few minutes before is turning ON the ldr module is clicking very fast and the led strip is flickering and after few minutes is solid ON.D58ADE3A-7287-4109-A18D-9ACC709FE48D.jpeg
 

AlbertHall

Joined Jun 4, 2014
12,345
I bought ldr sensor module on amazon, see photo.
How to fix it not to flicker few minutes before the light is ON?
When is dark the 12v led strip is turned ON by ldr sensor module but every time just few minutes before is turning ON the ldr module is clicking very fast and the led strip is flickering and after few minutes is solid ON.View attachment 162552
It needs some hysteresis - positive feedback - around the comparator but it is difficult to say what to add where without a schematic.
What letters/numbers are on the top of 8 pin chip?
 

LesJones

Joined Jan 8, 2017
4,174
As the sensor is not being effected by light from the LED strip I agree with Alberts's theory. You will probably have to trace out the schematic of the module so that we can suggest a modification to add hysteresis. I found this module on Ebay which looks similar to yours. The information says it uses an LM393. (A dual comparitor chip.)

Les.
 
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