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/diy/ - Do-It-Yourself

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Question thread?I'll...
Anonymous 05/10/14(Sat)06:43 UTC+1 No.636378 Report

Question thread?

I'll start. What's a good website to buy soldering materials from (practice)? I plan on learning some electronics soldering and wouldn't mind some advice on what to get for practice. Just PCB, solder, and wire?

Anyway, ask your questions that don't deserve a whole thread here.
Anonymous 05/10/14(Sat)06:48 UTC+1 No.636380 Report

OP, I don't do a ton of soldering myself but if you wanna practice, a roll of solder, a soldering iron, and some circuit kits will take you very far, you don't really need to go through a shit ton of it to get half-decent at soldering. Just try the usual online stores? Amazon?

As for question thread, anybody have any good knife sharpening advice? I'm working with a $4 Harbor Freight 2-sided stone and the inside of an old leather belt, and I can get my stuff sharp enough to cut paper just fine, but I can only very rarely get shaving sharp (and even then it pulls more skin than hair). Is it a matter of technique or is it worth it to invest in better equipment?
Anonymous 05/10/14(Sat)07:03 UTC+1 No.636385 Report

Here's some old but good stuff related to soldering:

Anonymous 05/10/14(Sat)07:07 UTC+1 No.636388 Report


It's both practice and equipment.

Some of the sharpening sets have angled holders and rods - I suppose you could even make a decent sharpening set from wood yourself, getting the perfect angle.
Anonymous 05/10/14(Sat)07:12 UTC+1 No.636389 Report

Eh, if that's the case then I guess I'll just cheap out and stick with my setup. $4 for maintaining my knives to "sharp enough" is fine with me.
Anonymous 05/10/14(Sat)08:29 UTC+1 No.636410 Report


You don't have anything local that might sell such things?

Assuming you already have an iron, any roll of 63/37 (eutectic) flux core solder will last you an absurdly long time. I bought a ~$25 1lb roll years ago, and I have no idea when this thing is going to run out because it's just a ridiculous amount to go through for manual soldering. Like tens of thousands of through-hole joints worth.

Perfboard is (to my mind) obnoxiously expensive. I got a couple dozen regular double-sided CEM boards for the price of like...three or four perfboards of the same size. Granted, plain copper clad isn't exactly useful unless you either have a CNC router (luckily I do) or a way to etch it, so you might be kind of stuck there.

Grab at least two rolls of stranded wire in the 18 to 22AWG range; red and black. If you can spring for red, black, green, and possibly some other color (blue, yellow, or white), that will come in handy, but don't bother if you don't plan on actually using it for projects.

A deoldering bulb or vacuum pump, desoldering braid/wick, and flux are useful if you ever have to do any repair work.

You may considering springing for a temperature-controlled soldering station. The price of that alone would eclipse everything else I've listed combined, but I got one after nothing but a $15 Radio Shack special and wow did I feel like an asshole for not buying one sooner.

You should be able to grab all this crap from the same place, and you have a lot of choice as far as what that place is. LOT of sites around selling electronics hobbyist stuff, and eBay is always a thing.
Anonymous 05/10/14(Sat)08:30 UTC+1 No.636411 Report


One last note...if you don't actually have need of this stuff any time soon, don't bother getting it. Soldering isn't a difficult thing to learn, and, for most entry-level hobbyist projects, you could have the most nasty-ass, ugly, cold-looking joints all over your board and it probably wouldn't have any ill effect anyway. It only starts to get tricky if you're working with boards that don't have solder mask, small SMD parts, or heavier wires.
Anonymous 05/10/14(Sat)08:44 UTC+1 No.636414 Report

How do I prevent the wires in my terminal block relay from slipping out? is there some sort of header I'm supposed to use?
Anonymous 05/10/14(Sat)10:21 UTC+1 No.636437 Report

nvm fixed it. My screwdriver head was shit.
Anonymous 05/13/14(Tue)14:15 UTC+1 No.637778 Report

Sounds like you are confusing sharping a knife with sharping a strait razor.
A good knife to cut flesh has a micro serrated edge some what like a hack saw blade. To shave the fuzz off your forearm you need a smooth strait razor.
Anonymous 05/14/14(Wed)06:48 UTC+1 No.638131 Report

Can I make my Braun Thermoscan IRT-3020 (IR ear thermometer) display temperatures above 43°C?
Anonymous 05/14/14(Wed)19:51 UTC+1 No.638321 Report

Jameco is a great resource for a beginner. Bought a learn to solder set for a girl I've been courting who was interested in learning. It was a hit. Lot's of toys and useful kits there.
Anonymous 05/14/14(Wed)20:11 UTC+1 No.638329 Report

SparkFun has some beginner soldering kits that come with the iron and solder and stuff...
Anonymous 05/14/14(Wed)21:10 UTC+1 No.638355 Report

No; it will only display human temperatures (93.2 °F - 108 °F / 34 °C - 42.2 °C). After that it will just say HI or LO (sauce: http://www.service.braun.com/line/PD/D6012/D6012_6_NA.pdf) Also that thermometer is pretty shitty in general.

Do any of you anons know a good program for constructing AC/DC circuits WITH live updating resistances and voltages. Support for potentiometers, capacitors, inductors, and so on would be nice too.
Anonymous 05/14/14(Wed)21:34 UTC+1 No.638370 Report

What would be good and cheap material to use for making "practice pads" for my drums to quiet them? I just need some material that I can cut and tape onto my drums/cymbals to stifle them for apartment jams.
Anonymous 05/14/14(Wed)21:44 UTC+1 No.638376 Report

Mouse pads glued to plywood

Anonymous 05/14/14(Wed)23:37 UTC+1 No.638419 Report

I need pads that I can place on my drums, not just practice pads. So maybe just mousepads.
Anonymous 05/15/14(Thu)00:07 UTC+1 No.638428 Report

Here's a coupon code for $10 off $20 or more on Sparkfun:

Expires June 30th
Anonymous 05/15/14(Thu)00:17 UTC+1 No.638431 Report

Also I could see a yoga mat working. bonus you can always cut a perfect size, maybe even save some money compared to mousepads depending where you get it.
Anonymous 05/15/14(Thu)02:09 UTC+1 No.638461 Report

how hard would it be to get into welding? nothing major but i would like to make a back rack for pic related since they dont sell anything that would fit it
maybe something like link related but probably more simple
Anonymous 05/15/14(Thu)02:10 UTC+1 No.638462 Report

fug i didnt realise the link was that long sorry
Anonymous 05/15/14(Thu)05:09 UTC+1 No.638509 Report

Pic related would be trivial to weld together. Just watch some Youtube videos and pick up some scrap metal to practice your bead on
Anonymous 05/15/14(Thu)11:52 UTC+1 No.638610 Report

pic related in this one is what i would be trying to make the other 2 pics is somewat similar to what i would be trying to mount it on anyone have a suggestion on a cheap welding setup?
Anonymous 05/17/14(Sat)06:25 UTC+1 No.639365 Report

thats a pretty good idea. thanks m8
Anonymous 05/18/14(Sun)04:12 UTC+1 No.639731 Report

Has anyone in an urban apartment tried to power an external AC unit using solar panels? What is the cheapest way to set this up

My elec. bill rockets through the roof during the summer and I'd like to engineer my way into a work around

thank you in advance
Anonymous 05/18/14(Sun)04:29 UTC+1 No.639740 Report

not worth it.
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