I'm working on a line follower and have run into a problem with the sensor module!
I'm using an array of 5 IR leds and photodiode that gives inputs to 3 LM358s (2 sensors per chip)...the problem I'm facing is that the last IR leds pair doesnt seem to be giving any output.The other 4 leds work perfectly though and all have identical connections.
I've narrowed down the problem to the sensor board since I've tested the board with the LM358's successfully.It also isn't a IR led problem since it seems to be emitting properly when checked with a camera...and I've also tested the photodiode before soldering.
Here's a picture of the sensor board :
The pair on the exreme left is the one that doesn't give any output.
Here's a picture of the board with the LM358's...no problem on this board (I've already tested it many times)
Heres the board when it detects black..or no reflection :
and here it is when it detects a white surface (all LEDs should be off) :
So that's the problem I'm facing...the last IR led pair doesnt seem to be giving any input to the L358.
Here's the diagram of the connections I've soldered on the Led board :
Would be grateful for a solution to this problem !
) and I also tested the photodiode on a breadboard before connecting it…is there an easy way to check it without desoldering?