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breaking off capacitor from IO-board of pulsar 2 and scope
Posted: Sun Feb 22, 2015 12:58 pm
by ThomasT
Hi,
during reinstall of the card I mistakely broke off the 47u capacitor on my 6 DSP pulsar2 board. See red circle. Exactly spoken from the I/O-card.
What is this capacitor for? What happens if it is mssing?
- DSC00510_pulsar_kondensator.jpg (170.73 KiB) Viewed 3033 times
The "funny" thing is, that I realized that this capacitor is missing on my 14 DSP scope card, too. I never break it myself. The previous owner sold me the card without it. The card worked for more than 6 years now ...
Thomas
Re: breaking off capacitor from IO-board of pulsar 2 and sco
Posted: Sun Feb 22, 2015 4:43 pm
by garyb
redundant.
it's probably better on than off, but it should be ok without it.
Re: breaking off capacitor from IO-board of pulsar 2 and sco
Posted: Sun Feb 22, 2015 4:56 pm
by ThomasT
garyb wrote:redundant.
it's probably better on than off, but it should be ok without it.
Ok. Then I don't risk damage during soldering. (I can solder, even SMD, but you never know)
But what is it for?
Re: breaking off capacitor from IO-board of pulsar 2 and sco
Posted: Sun Feb 22, 2015 5:05 pm
by garyb
if you can solder and know the correct position(polarity) of the leads, then put it back on.
i believe it's to buffer the grounding on the card. it keeps the card's power quiet. there are a whole bunch of those caps, multiples for each dsp.
Re: breaking off capacitor from IO-board of pulsar 2 and sco
Posted: Mon Feb 23, 2015 7:18 am
by jhulk
its a bypass cap they are used to keep any spikes of voltages from the regulators as the capacitor
sinks it and gives a constant dc no ripple
bypass caps are also used as noise prevention when stray hum happens by adding a bypass cap it adds a good path to ground
they are not needed in most places but are put there as a precaution