Original Dallas Rangemaster Master

[myonus666]

Its possible that 9v needs to be at pin 1 and 8 due to the noise thing you mentioned. I will keep that in mind for the next build

[Travis]

The layout is correct and has been successfully built countless times. There is apparently a problem with your stripboard build

The 7660s definitely needs pin 1 and 8 connected for audio use but some charge pump ICs are different

[rocket88]

There’s nothing wrong with the layout as it is now. I’ve built it hundreds of times and no issues, I’ve added it to other boards without issues. I think there is something wrong with the chips you have. As Travis mentioned, many have received faulty or fake 7660s chips, which 9/10 times is the issue.

[myonus666]

I understand.  My mouser chips should be here in a week or so.  See what happens with new chips.  Thanks for all your help, everyone,  

Kind regards,