"charles" wrote in message
...
In article ,
Brian Gaff wrote:
There is an old rule in DIY electronics. Your wonderful device works fine
when its a spiders web of bits joined by wire on a workbench, but as
soon as you put it into a case things start to not work quite right.

a rule of professional electronics is "First - check the power supply"

Not with a brand new device which behaves the same
way with a second copy. That wont be the power supply.

You might need a 'scope to do this properly
- correct volts is necessarily the answer.