Hi All,
I am posting this hoping someone can help. It is my first PCB.
I have designed this circuit below. On the breadboard, it works as expected however after I manufactured the board and soldering the components, it doesn't work. There are two sensors on the board PIR and proximity sensor. The proximity sensor works fine but the PIR sensor doesn't work. I have checked every connected more than 10 times but can't figure out where it is going wrong.
The rest all seems fine. Can you take a look and see if I have missed something? Or any suggestion for testing?
Thanks in advance.
I am posting this hoping someone can help. It is my first PCB.
I have designed this circuit below. On the breadboard, it works as expected however after I manufactured the board and soldering the components, it doesn't work. There are two sensors on the board PIR and proximity sensor. The proximity sensor works fine but the PIR sensor doesn't work. I have checked every connected more than 10 times but can't figure out where it is going wrong.
- The PCB has two layers, the top and bottom layers are GND.
- U1 is LM290
- On pin 7 of U1 I get a different value to pin5 of MCU
The rest all seems fine. Can you take a look and see if I have missed something? Or any suggestion for testing?
Thanks in advance.
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