I'm a total hardware engineering noob who's getting into Arduino development. I have an Electric Imp connected to the Arduino via a shield
, which works great. However, I've added another shield that conflicts with the pins that are used by the Electric Imp for software serial IO. The Imp shield says that I can cut a trace and wire a jumper to use hardware serial on two open ports instead. I've never done this before – can someone give explicit steps as to what I need to do? [more inside]
posted by krunk
on Feb 11, 2014 -
I have a Weller SP23 (23W) soldering iron which I've used for a couple of small through-hole kit projects. It's got a chisel tip which seems to have a ~4mm wide edge. I think I want a smaller chisel tip (maybe 2 mm) or maybe a new, versatile soldering iron. [more inside]
posted by amtho
on Jul 14, 2013 -
I've been building guitar pedal kits from buildyourownclone
, and it's been great fun. I'm running out of pedals I want to make for myself, and am looking for other projects, like this stereo tube amp
, and maybe this sous vide
. Can you recommend more electronics projects (preferably kits, so I don't have to scrounge for parts) that are cool and look good at the end? [more inside]
posted by Admiral Haddock
on Mar 21, 2013 -
A gas stove in our family room uses a thermocouple, millivolt valve and manual switch to control the gas to the stove. I need to solder a new switch to the leads that go to the old switch (the total wire length is about 4 feet). What precautions do I need to take to ensure that I do not blow out the millivolt gas valve when I do the soldering? [more inside]
posted by mbarryf
on Feb 18, 2013 -
I need to buy some reballing materials like solder balls and some kester 951
i believe no clean water soluble flux. I need to obtain these items preferably as close as possible to Waterloo Region Ontario Canada. I need some ideas on how to get this stuff cheaply and effectively. Also any links to the shops that I just cant find would be great.
posted by Chamunks
on Sep 5, 2012 -
I would like to learn more about electronics and circuitry by making a LED light panel. I have questions about how to calculate the number of LEDs I need, soldering, and how to diffuse the light. [more inside]
posted by gagoumot
on Aug 2, 2012 -
I am the proud new owner of a soldering iron. What are some good first projects? Must be cheap and at least marginally useful. Blinky lights are a plus! [more inside]
posted by Scientist
on Mar 15, 2012 -
I'm trying to pick up this Arduino project, but I do not know how to solder. I bought this temperature controlled
Weller unit, and leaded solder (63% Sn / 37% Pb). What temperature do I need set the unit to? How exactly does "tinning" work? How do I prevent the board from burning when the tip gets close? [more inside]
posted by geoff.
on May 31, 2010 -
I want to make little machines that do cool things. I've been daydreaming and doing moderate "research" for years and years. How do I make this into reality? [more inside]
posted by elephantsvanish
on Mar 13, 2010 -
Does anyone have experience repairing the power jack on a laptop? My wife's old (circa 2006) Dell laptop won't charge, due to what seems like a loose power jack connection. I've repair found tutorials, and it doesn't seem that bad, does it? (More details inside) [more inside]
posted by filthy light thief
on Feb 12, 2010 -
I have a medium-sized run of printed circuit boards that'd be most cost-effective for me to silkscreen/photo-etch at home. I'm pretty sure I got that part covered... lots of tutorials available [1, 2, 3, etc]
It'd be a shame, though, to build this setup and then not use it again, so I'm wondering where are some great repositories for
(all types of) PCB layouts?
Added difficulty: Would like reasonable descriptions of "what they do" and how the boards are likely to be employed. [more inside]
posted by jjjjjjjijjjjjjj
on Dec 30, 2008 -
Should I eat – er, solder – this? I'm building a preamp and I just discovered that I'm low on 0.1μF 50v ceramic disc capacitors. My question is about whether it's worth trying to salvage more from another (already disassembled) piece of equipment. [more inside]
posted by Your Time Machine Sucks
on Aug 22, 2008 -
Using a AA battery, two pieces of speaker wire and an LED, I am trying to make a simple circuit. I am meeting with complete failure. Help! [more inside]
posted by puckish
on Aug 11, 2008 -
I want to learn metal crafts using a scribe/jeweler or marquetry saw and soldering. I live in Los Angeles (specifically Burbank) and I've tried vocational schools but can't find any specific courses, just entire certification programs in welding & such. I'm better learning when someone experienced is teaching and not from a book. I'm willing to pay for courses...just can't find any.
posted by Sophie1
on Mar 25, 2008 -
Basic Electronics Repair Filter
: I recently purchased a used Korg ES-1
and after a few months the power started to randomly cut out... turns out the power pin on the mainboard has come loose. [more inside]
posted by Espoo2
on Feb 27, 2008 -
Soldering - Please give me all your iron and accessories recommendations for a beginning home hobbyist (electronics, circuit boards, etc) [more inside]
posted by malacologist
on Jul 23, 2007 -
Electronics filter: What can I do to make a 24v PSU turn into a 18-19v PSU? It's 0.5A power supply which as far as I can tell is important to know when using, say a resistor to lower voltage. But how resistant should the resistor be? I've found information on how to tell a resistor's value, but not how it will actually effect a line's voltage or how to calculate it. Are there any good sites with this information? Also what will happen to the amount of amps the PSU supplies when I do change it to 18/19v??
Also, what can be done to increase the amperage of a power supply? What inside the circutry is actually dictating the amperage?
posted by Napierzaza
on Dec 3, 2006 -
My Turntable will only play through one channel. I have a soldering question, because I have to replace the RCA cables. Can someone teach me how to properly solder audio equipment?
I have never soldered before, but I am handy with electronics. The Turn Table in question is a Pioneer PL-10, a nice older one that goes well with vintage reciever.
I bought it for $30 along with some scratched up first pressing Beatles albums. Basically, when the needle is down you can only hear one channel. There is absolutely no signal from the left RCA cable. When I reverse the plugs, the dead RCA cable is still dead.... just on the other channel.
posted by Dean Keaton
on Mar 20, 2005 -