Thank you John, I already have a ferrite on the powersupply cable. I think I'm
going to manage the noise with the housing.
Trying the Clock in a Dark Room; It seems like when the 74151 in displaying a
blank "output A" the tube is not completely off; but is glowing a little bit :
- Is it normal behavior, because the 74151 just drop the voltage by
100V and not to 0V
- Do I have to worry and remplace the 74151 because it's leakage ?
Cheers,
On 2 févr. 2012, at 20:21, John Rehwinkel wrote:
>> It's almost done (hope I can share picture soon) ; the only issue is
>> coming from the wall wart I use which is a first price product and is
>> very noisy.
>>
>> Is there any certification or specification to ensure the product is
>> low noise ? I need a regulated 6V @2A (mainly because of the wifi
>> interface).
>
> I had another thought, if you already have an adapter that works, aside from
> the output noise. If high frequency noise is the main problem, you could try
> putting a ferrite RF suppressor on the output lead.
>
> - John
>
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