What is SpaceFN and why you should give it a try
The SpaceFN concept - setting up your space key as a layer switch when held - is probably one of the most useful tweaks in the keyboard hobby. Let me explain how it works. My SpaceFN article on kbd.news made some rounds recently - quite surprisingly given the age of this concept. This piece you're reading is a condensed version of the full post. If you're left with unanswered questions, you'll most likely find the info you're looking for in the original write-up. On my imaginary top list of the most useful keyboard features, tweaks and hacks, SpaceFN would deserve a podium finish for sure. But what makes it so special? In short: SpaceFN is easy to implement, easy to learn, costs nothing, can be used with any keyboard, and can improve your productivity instantly. I will list its benefits below, but can state right at this point that the SpaceFN concept, setting up your space key as a layer switch when held, is clearly one of the most useful tweaks in the keyboard hobby....
Apr 30, 2024
Whatever you buy, make sure the tips are compatible with a good brand like Hakko because most of the quality you need is in just the tip.
I have no experience with the SEED portable soldering irons, but I feel that for that price, it's easier to just get a proper station.
In terms of temperature: If you're using regular 60/40 solder, 350 degrees is a good temperature, if you're using lead free, you might want a higher temperature.
Most importantly, you want the entire pad and the area of the component that you will be soldering to to be hot enough in one to three seconds before applying the solder. Any longer, and you risk melting plastics and damaging the components.
I feel matt3o has some good guidelines for this, but as I've mentioned in the comments and on here, you want to apply the heat before the solder, not the other way around.
For removing flux, you can't go wrong with isopropyl alcohol and a cotton pad. When wiping, twist the cotton bud/pad/earbud instead of swiping it because it leaves fewer strands of cotton all over the place.
I use 99% isopropanol from the drugstore to remove leftover flux in generous quantities and wiping with kimwipes or a microfiber cloth . A lot of people leave the flux when using no clean solder, because its not as corrosive.
My temps are a bit lower, I use 310 degC for leaded and 325 degC for non-leaded. My favorite solder is 0.020" Kester SN62/PB36/AG02 as the joints are shinier and it's pretty easy to work with.