lilimike
Member
Hi,
I am struggling with an issue I am trying to understand but it is not making sense.
I have this very simple circuit which on breadboard I am getting 9V and 5V as expected but on a single layer PCB I am getting the values shown on the attachment:
![TestReg.jpg TestReg.jpg](https://www.electro-tech-online.com/data/attachments/36/36382-aceae7a6265162733b67a31699290aef.jpg)
I have isolated 7805 from the rest of the circuit by splitting the copper trace, I have tried removing C2 and I get the same result. I pulled out 7805 and tested it on breadboard and its good, I also tried a diffeent component but get the same result, I am sure ground is at 0V and the voltage coming out of 7809 is pure DC.
I have been looking and analyzing and looking and analyzing this circuit for the past couple of hours and I can not figure it out!
Mike
I am struggling with an issue I am trying to understand but it is not making sense.
I have this very simple circuit which on breadboard I am getting 9V and 5V as expected but on a single layer PCB I am getting the values shown on the attachment:
![TestReg.jpg TestReg.jpg](https://www.electro-tech-online.com/data/attachments/36/36382-aceae7a6265162733b67a31699290aef.jpg)
I have isolated 7805 from the rest of the circuit by splitting the copper trace, I have tried removing C2 and I get the same result. I pulled out 7805 and tested it on breadboard and its good, I also tried a diffeent component but get the same result, I am sure ground is at 0V and the voltage coming out of 7809 is pure DC.
I have been looking and analyzing and looking and analyzing this circuit for the past couple of hours and I can not figure it out!
Mike