Hello Andy,

That's good to know and the lead lengths are a bit (possibly a lot...)
excessive, so grounds are scattered. I have a few DIP dividers to play
with on the breadboard so I don't scrap another PCB getting it to
perfection. Thanks, divider next then hopefully it will all be OK when
it's built up properly! The MF one does a very good job for what it cost.


Wednesday, January 31, 2018, 3:31:16 PM, you wrote:

> If you only have supply of 0/5V you cannot have a negative '0' level.   
> If your scope shows it, then it is possible your scope ground is
> not connected properly yo the -ve rail but instead to somehting
> further back showing a small 0.5V drop
> or  teh scope needs setting up


> Don't worry about it.  The wqaveform looks perfect - very nearly
> 1:1 square wave - its what happens when you do a design properly
> Now worry about sorting out the divider.


> Andy







-- 
Best regards,
 Chris                            mailto:[email protected]