[sdiy] Peak Detector

[Frédéric Piron]

Oops,

Scott is right, Red led must be in the opposite direction.

sorry about that...


fred



Le 2 avr. 04, à 16:07, Scott Gravenhorst a écrit :

> LEDs in parallel without separate current sharing resistors will likely
> result in only one LED lighting.    I see that one is green, the other  
> is
> red.  If these are meant to indicate opposite polarity, then one of  
> these
> LEDs is not correctly oriented in the drawing.
>
>
> =?ISO-8859-1?Q?Fr=E9d=E9ric_Piron?= <frederic.piron at cota.be> wrote:
>>
>> Here's a schematic for what you need.
>> (Based on thomas henry design.)
>>
>>
>> http://www.xpmtl.net/terencehacker/diy/peak_indicator.jpg
>>
>> cheers,
>>
>> Fred
>>
>>
>>
>> Le 2 avr. 04, à 16:11, David Reichert a écrit :
>>
>>>
>>> Hi everyone,
>>>
>>> I was wanting to build a peak detector circuit to indicate when a
>>> signal
>>> goes above 5Vp-p. Just one of those single LED indicator types.
>>>
>>> Seems to me the simplest thing to do would be to use a comparator  
>>> which
>>> sets off a 555-timer monostable.
>>>
>>> Are there better ways of doing it or does anyone have a circuit handy
>>> for this?
>>>
>>> Thanks,
>>> Dave
>>>
>>>
>>>
>>>
>>
>>
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