Addison Snyder
Contributor
Late to the party, but the second you said that there was only one capacitor and I saw that thing, I noticed it had a bit of a bulge in it (even at the bottom). Good luck replacing it and fixing it overall 
Testing Canister Cap
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OP
in too deep
Contributor
FYI- I have some information from another forum member regarding the single capacitor.
It is wired in parallel so both circuits take advantage of it.
He gave me some other information as well which is helpful to understand the benefit of the circuits.
It is wired in parallel so both circuits take advantage of it.
He gave me some other information as well which is helpful to understand the benefit of the circuits.
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care to share with the group?
OP
in too deep
Contributor
Info came from Lucca Brassi - I copied and pasted his reply.
"That capacitor ( as I see it is electrolytic capacitor ) as you say is connected between + and - of one piezo circuit .
Because all electric consumers are wired parallel it work for both circuits .
Reason why is there is probably the same as 2 ferite rings on red/black power supply wires - to isolate ( absorb ) / prevent electrical spikes and flickering from led driver back to switching circuit which might cause loop.
Piezos are very sensitive circuits and power outages can cause switching errors"
"You can go with your lamp to some repair electronic shop and connect with oscilloscope probe on capacitor place , one time without it and one time with it , while lamp working and you can operate on buttons.
If you see spikes without capacitors , then you need it
FET is in driver then come led to ground"
"That capacitor ( as I see it is electrolytic capacitor ) as you say is connected between + and - of one piezo circuit .
Because all electric consumers are wired parallel it work for both circuits .
Reason why is there is probably the same as 2 ferite rings on red/black power supply wires - to isolate ( absorb ) / prevent electrical spikes and flickering from led driver back to switching circuit which might cause loop.
Piezos are very sensitive circuits and power outages can cause switching errors"
"You can go with your lamp to some repair electronic shop and connect with oscilloscope probe on capacitor place , one time without it and one time with it , while lamp working and you can operate on buttons.
If you see spikes without capacitors , then you need it
FET is in driver then come led to ground"
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ahh surprised @lucca brassi didn't just post that in this thread.
either way, I would suspect that it is in there for a reason, and buying a replacement capacitor is not all that difficult, so I'd put it back in
either way, I would suspect that it is in there for a reason, and buying a replacement capacitor is not all that difficult, so I'd put it back in
OP
in too deep
Contributor
Agreed.
Curious to why it failed.
I recently got a new 40 watt LED Yellow Diving head.
On the other switch I have a Yellow Diving heated vest and changed from their gloves to a pair of SF Tech heated gloves.
Curious to why it failed.
I recently got a new 40 watt LED Yellow Diving head.
On the other switch I have a Yellow Diving heated vest and changed from their gloves to a pair of SF Tech heated gloves.
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@in too deep we deal with large capacitors at work all the time, they seem to have higher fail rates based on age, and based on number of cycles of heating and cooling, i.e. they last forever if you turn them on and they stay on, but if you turn everything on and off, they fail faster. Sh!t happens, life goes on, electronics fail. It happens. You may however want to put two independent capacitors in if you are worried about another one failing. If you do that, then at least you'd have one life e/o cord
OP
in too deep
Contributor
It's 8 years old, so good to know.
the cap is 16v 4700uf 85*c. the length is almost 30mm and diameter is 13mm.
what is the difference between caps with the same values but different dimensions.
i'll head to the electronics parts store tomorrow to pick up one
the cap is 16v 4700uf 85*c. the length is almost 30mm and diameter is 13mm.
what is the difference between caps with the same values but different dimensions.
i'll head to the electronics parts store tomorrow to pick up one
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@in too deep as long as the specs are the same, the dimensions are irrelevant, just where they physically fit and how they mount.
lucca brassi
Contributor
Switching circuits need special capacitors with low ESR Equivalent series resistance - Wikipedia
in ''normal electrolyte capacitors '' that increases over time ( most computers mainboards or power supplies die because of that ( temperature , age ) - If you replace them , then it will computer work normally in future. You can measure it with cheap ESR meter.
ESR meter | eBay
Now in critical places, electrolytic ones are being replaced by "dry" tanatal capacitors , and now with polymer capacitors which are even better but costs more .
If you interested in reading ;-)
https://www.mouser.com/pdfDocs/guidetoreplacinganelectrolyticcapacitorwithanmlcc.pdf
in ''normal electrolyte capacitors '' that increases over time ( most computers mainboards or power supplies die because of that ( temperature , age ) - If you replace them , then it will computer work normally in future. You can measure it with cheap ESR meter.
ESR meter | eBay
Now in critical places, electrolytic ones are being replaced by "dry" tanatal capacitors , and now with polymer capacitors which are even better but costs more .
If you interested in reading ;-)
https://www.mouser.com/pdfDocs/guidetoreplacinganelectrolyticcapacitorwithanmlcc.pdf
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