It looks like you're putting some solder on the iron's tip and then putting a blob between each resister lead and the bus where they cross. Don't you have to heat the connection and then introduce the solder (with flux core) while continuing to heat? If you don't, then it might work, or you might end up with a cold solder joint that could fail at any time. Admittedly, I've "cheated" in this way, too, but whenever I do, I put some flux or flux paste on the joint first to make sure that it is de-oxidized and that the solder will properly flow. Am I missing something? Like maybe you moved the iron's tip so quickly to the joint that the flux is still doing its work, and that is enough to get the job done properly? If not, then you might want to consider adding some flux ahead of time (just a tiny amount will do).
You're right, this is a bad example to follow and I barely got away with it because I was using solder with enough flux in it's core. I went back afterwards and reflowed the joints, which produced better connections.
Usually, yes. On a PCB, the silkscreen should note the common pin -- some conventions I've seen are a box around the through-hole, or * next to the pin number.
It looks like you're putting some solder on the iron's tip and then putting a blob between each resister lead and the bus where they cross. Don't you have to heat the connection and then introduce the solder (with flux core) while continuing to heat? If you don't, then it might work, or you might end up with a cold solder joint that could fail at any time. Admittedly, I've "cheated" in this way, too, but whenever I do, I put some flux or flux paste on the joint first to make sure that it is de-oxidized and that the solder will properly flow.
Am I missing something? Like maybe you moved the iron's tip so quickly to the joint that the flux is still doing its work, and that is enough to get the job done properly? If not, then you might want to consider adding some flux ahead of time (just a tiny amount will do).
You're right, this is a bad example to follow and I barely got away with it because I was using solder with enough flux in it's core. I went back afterwards and reflowed the joints, which produced better connections.
so pin 1 is the common pin?
Usually, yes. On a PCB, the silkscreen should note the common pin -- some conventions I've seen are a box around the through-hole, or * next to the pin number.