@Giskard42 I'll be impressed if you tell me you have a garage-lab way to be sure it's actually 0.1 mm.

(And anyway, that's pretty thick for a thin-film process)

@ThePhoton Rough estimate, no idea how thick it actually is. It's very thick, I'm trying to get as thick a film as I can

Using this: dienadel.de/fixpoint-ep5-digitale-loetstation/a-353633188 it has a (caution) triangle on the box saying "lead free". Would that suggest one should use lead free solder only?

@user367890 It is probably there to tell you it's legal to sell in Europe.

You shouldn't have any trouble using it with Sn-Pb solder.

But once you do that, you'd want to change the tip before using it on something you want to certify as lead-free.

@ThePhoton: OK. Did not know there was restrictions on that.

Does it make sense for a brewpub 100 miles from the equator to offer "seasonal brews"?

I have this: aimsolder.com/products/alloys/sac305 that is lead free. Do not understand the Data Sheet though: aimsolder.com/sites/default/files/alloy_sac305_tds.pdf – unable to see where it specify flux.

The roll has the printing "FLUX GLOW CORE 2.5%" and thought that meant it had a flux core ..

@user367890 It prbably does have flux core. Even so, adding additional flux can improve soldering.

@ThePhoton: Thanks. Neighbor stole my flux :( Have to buy some more :P

... or, he threw it away.

Gotta go,

I have access to both tree sap and vodka though. Perhaps I should make my own

:P

@user367890 Fun fact: pine resin isn't sap. The purpose of sap is to carry water and nutrients throughout the plant. The purpose of resin is to heal injury and to defend against burrowing insects.

Can anyone interpret the information on this relay: It says 10A 250 VAC, 10A 125VAC and then below those it says: 10A 30VDC, and 10 28VDC and it also says: srd-05VDC-SLc. I know that the coil requires 5v which I'm assuming is the srd. What does the 10A 250VAC AND the 10A 125VAC mean? I'm assuming this is the max the relay can switch but what is the point of putting both of those phrases on the relay, why not just 10A 250VAC?

or am I interpreting the information incorrectly?

What does the data sheet say?

It might be certain preconditions

I think that this is the datsheet: mycomkits.com/reference/Songle_SRD(T73)_Relay.pdf

the table says srd and srd high sensitivity

i think it is just regular srd

as it says printed on the relay

Wow, the formatting of that data sheet is crap...

need some sort of transistor to drive the coil due to higher current. Is an optocoupler+transistor a "good" way to drive it

ya the formatting is messed up

oh

so UL would be the 125 VAC 10A one?

That's how I would really section 4

Oh ... missed section 4 , thanks

just out of curiosity: are UL ratings always more "conservative" of safe operating conditions?

like trend wise

thanks for the help

Its whatever the manufactuerer decided to have certified

@NickAlexeev: Thanks. After a quick check on translate I see it was resin I meant. Remember I read about it in a radio-magazine from the 1940s :P I chew hardened resin from spruce. A nice “chewing gum” :)