Hi!
I have a follow-up question to the discussion of how to effectively clean a board after soldering the parts:
Are trimpots sensitive to isopropyl alcohol / demineralized water?
I know that it is somewhat risky to be impatient after the board was rinsed (water-residues under caps etc.) but I'm not sure about wether a trimpot could take damage of it?
(On my last build, I have finished my board except the trimpots, cleaned them and only then soldered the trimpots, just to be sure...)
Are other parts, like relays etc. at risk?
thanks
david
I have a follow-up question to the discussion of how to effectively clean a board after soldering the parts:
Are trimpots sensitive to isopropyl alcohol / demineralized water?
I know that it is somewhat risky to be impatient after the board was rinsed (water-residues under caps etc.) but I'm not sure about wether a trimpot could take damage of it?
(On my last build, I have finished my board except the trimpots, cleaned them and only then soldered the trimpots, just to be sure...)
Are other parts, like relays etc. at risk?
thanks
david
I would not expose a trim pot to water, etc. unless it is hermetically sealed.
Same for other electronic parts.
Same for other electronic parts.
Thanks rayma.
this "unless it is hermetically sealed" is what bothers me...
are these (fully sealed IP67) safe? 3/8" Square Multi-Turn Cermet Trimmer
I'd say yes, but haven't the experience, better safe than sorry...
this "unless it is hermetically sealed" is what bothers me...
are these (fully sealed IP67) safe? 3/8" Square Multi-Turn Cermet Trimmer
I'd say yes, but haven't the experience, better safe than sorry...
The data sheet says "Fully sealed - IP67" so it should be ok.
I've always used these: https://www.bourns.com/docs/Product-Datasheets/3329.pdf
With many of them in the field, never a single problem even after 40 years, and very stable.
I've always used these: https://www.bourns.com/docs/Product-Datasheets/3329.pdf
With many of them in the field, never a single problem even after 40 years, and very stable.
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Hi
is this a double sided or just single sided PCB?
If single then it's not a big task to clean this without to need to worry about components on the Component side. If double Side then you will need to be careful of Relays, as those not necessarily being water proofed.. If you have multi-turn trim-pots, then you don't need to worry..
To get the left over fluid out under the caps and other components, just stand up the board so it can rinse downwards.. if you don't want to have the "Water or solution edge" on the lower end of the Board then make sure that the edge does not contact the underneath table, get some spacers between the board and the table or on whatever you place it.. be sure that the spacers are high enough to also let the water drops drop off..the best you can do is to hang the board up freely, with a wire or likewise..
Hope this helps
Regards from Bern
Hpro
is this a double sided or just single sided PCB?
If single then it's not a big task to clean this without to need to worry about components on the Component side. If double Side then you will need to be careful of Relays, as those not necessarily being water proofed.. If you have multi-turn trim-pots, then you don't need to worry..
To get the left over fluid out under the caps and other components, just stand up the board so it can rinse downwards.. if you don't want to have the "Water or solution edge" on the lower end of the Board then make sure that the edge does not contact the underneath table, get some spacers between the board and the table or on whatever you place it.. be sure that the spacers are high enough to also let the water drops drop off..the best you can do is to hang the board up freely, with a wire or likewise..
Hope this helps
Regards from Bern
Hpro