Old Solder

Started by Joe in sci.electronics.basics7 years ago 23 replies

A couple of days ago I did a small repair to an electronic timer. It just need a bit of solder to reconnect a wire. I had a devil of a time...

A couple of days ago I did a small repair to an electronic timer. It just need a bit of solder to reconnect a wire. I had a devil of a time with that small repair, the solder just didn't want to flow over the wire and onto the pad on the PCB. A little while later, it occurred to me that maybe the problem was that I had used some old solder - about a foot or so are remaining on probably a...


Soldering Fumes

Started by redbrickhat in sci.electronics.basics11 years ago 18 replies

Questions: A) What is the best respirator to use for solder fumes: one for particles/dust/fumes or one with a chemical filter? B)...

Questions: A) What is the best respirator to use for solder fumes: one for particles/dust/fumes or one with a chemical filter? B) What is the best solder vent exhaust system for home users? Thank you.


Re: Can nichrome be soldered?

Started by C. Nick Kruzer in sci.electronics.basics9 years ago 3 replies

Hi John, C. Nick Kruzer wrote: > Can nichrome be soldered to nichrome? > Can nichrome be soldered to copper? John: > Ordinary...

Hi John, C. Nick Kruzer wrote: > Can nichrome be soldered to nichrome? > Can nichrome be soldered to copper? John: > Ordinary silver solder will bond to both metals. > But you have to keep the soldered joint well > below the softening temperature of the solder > for the joint to last. Thanks for the the excellent soldering tips. I've used silver solder for putting together copper p


Solder flux and resistance

Started by George Herold in sci.electronics.basics7 years ago 6 replies

When testing a high impedance board (up to 1 G ohm) I found that the SMD 0805 10 Meg ohm resistors measured only 6 meg ohm. The problem was...

When testing a high impedance board (up to 1 G ohm) I found that the SMD 0805 10 Meg ohm resistors measured only 6 meg ohm. The problem was traced back to the liquid flux used with Rohs solder. (100 Meg and 1 G resistors are through hole and measured correctly.) I then wanted to measure the resistance of different =91flux blobs=92. I made big solder blobs on 0805 SMD pads (spacing bet...


How do you solder this?

Started by David Eather in sci.electronics.basics4 years ago 15 replies

I found this chip: http://www.ti.com/product/TPS60212 that will do all I need - step up 2v to 3.3v, very low quiescent current and a...

I found this chip: http://www.ti.com/product/TPS60212 that will do all I need - step up 2v to 3.3v, very low quiescent current and a small package. Unfortunately it is far too small a package - a VSSOP with a pin spacing of 0.5mm. Does anyone have some tips on how to hand solder this flyspec of an IC? I do SOIC, SOT23 and 0805 easily but this thing beats me. I did find a sim...


Cannot remove caps from motherboard

Started by Anonymous in sci.electronics.basics5 years ago 20 replies

I'm trying to repair my MSI motherboard by replacing the caps near the regulators since they are bulging and are most likely defective....

I'm trying to repair my MSI motherboard by replacing the caps near the regulators since they are bulging and are most likely defective. However, even at the highest setting of my soldering iron (480 degrees Celcius) I'm unable to liquify the solder. I don't know what kind of solder they're using for motherboards but it's obviously not the kind you can easily manipulate with common DIY to...


Unsolderable wire?

Started by Bob E. in sci.electronics.basics2 years ago 67 replies

I am trying to solder some RG-6 shield to a pcb. The braid won't tin. It's almost like it's dissipating the heat faster than I can apply it....

I am trying to solder some RG-6 shield to a pcb. The braid won't tin. It's almost like it's dissipating the heat faster than I can apply it. With both a temp-controlled iron (set as high as 700F) and a mondo 100W stick I finally tried. The solder will barely melt when touched to the braid opposite the iron. I've applied some Kester rosin paste flux as well using my trusty Kester 60/4...


Soldering 550m of copper wire

Started by Goran in sci.electronics.basics4 years ago 46 replies

I have to solder 550 - 600m of 1mm copper wire. Wire must be completely covered with solder. It will take some time to do this on regular...

I have to solder 550 - 600m of 1mm copper wire. Wire must be completely covered with solder. It will take some time to do this on regular basis ( with soldering iron ) so i was thinking to make some kind of slot in some aluminium housing and melt the lead alloy in it. Then i can put the wire in it and draw it slowly throe this slot. Additionally i can set some stepper motor on the othe...


Splattering solder into eye?

Started by Peter Hucker in sci.electronics.basics1 year ago 43 replies

Has anyone ever actually been unlucky enough to get solder splattering into their eye? I've had it hit my leg, hand, and face, but never in my...

Has anyone ever actually been unlucky enough to get solder splattering into their eye? I've had it hit my leg, hand, and face, but never in my eye. How bad is it? -- http://www.petersparrots.com http://www.insanevideoclips.com http://www.petersphotos.com Confuscious say: "War doesn't determine who's right. War determines who's left."


60/40 vs. 63/37 Solder

Started by Joe in sci.electronics.basics7 years ago 61 replies

Why are there these two very similar solders? Is there any situation where one is better than the other? I understand the eutectic nature...

Why are there these two very similar solders? Is there any situation where one is better than the other? I understand the eutectic nature of 63/37, and I wonder if/when 60/40 might ever be better to use. --- Joe


How to solder very thin stranded wire?

Started by DaveC in sci.electronics.basics5 years ago 33 replies

This is one conductor in a cable from some iPod earphones: http://www.tinyuploads.com/images/mizPu4.jpg What is the best way to deal with...

This is one conductor in a cable from some iPod earphones: http://www.tinyuploads.com/images/mizPu4.jpg What is the best way to deal with the fibre strands and to tin the wire? Thanks, Dave


Need simple 1vdc relay circuit

Started by Arcadefreaque in sci.electronics.basics8 years ago 6 replies

Okay, admittedly I am not that well versed in electronics. I can solder and follow directions well enough to put together some interesting...

Okay, admittedly I am not that well versed in electronics. I can solder and follow directions well enough to put together some interesting hacks occasionally, but I'm really a greenie when it comes to certain aspects. I'm trying to find a reasonable way to accomplish turning on and off a device that is powered by about 3.6vdc. The trigger mechanism would be a cell phone's vibration motor...


Soldering onto NiMH batteries?

Started by DeanB in sci.electronics.basics9 years ago 9 replies

Hello all, I've only done a little soldering before, but I want to rebuild a battery pack for my TI-59 calculator (which is basically 3...

Hello all, I've only done a little soldering before, but I want to rebuild a battery pack for my TI-59 calculator (which is basically 3 AA-sized batteries soldered together in series). Can I just solder directly onto the battery terminals? With a copper wire. Should I use flux? Will this overheat the battery and/or blow it up? Thanks for any tips!


Socket or solder?

Started by Frederick Williams in sci.electronics.basics5 years ago 18 replies

How would one make electrical connections to this: http://www.tube-amps.net/images/Hashimoto_Prods/H-30-5S_800.jpg? Is there a socket, or would...

How would one make electrical connections to this: http://www.tube-amps.net/images/Hashimoto_Prods/H-30-5S_800.jpg? Is there a socket, or would wires be soldered directly to the pins? -- When a true genius appears in the world, you may know him by this sign, that the dunces are all in confederacy against him. Jonathan Swift: Thoughts on Various Subjects, Moral and Diverting


Seating Header Strips

Started by Searcher7 in sci.electronics.basics5 years ago 3 replies

I am working on a project involving some 40 Pin 2.54mm Male Double Row Header Strips. I need to securely position two of them in parallel with...

I am working on a project involving some 40 Pin 2.54mm Male Double Row Header Strips. I need to securely position two of them in parallel with about an inch between them. The first thought was to get some PC board and drill holes for the pins and solder the strips in, but since I don't have the precision equipment needed to do this quickly I was wondering if there was another relatively...


Soldering a LED Display Matrix

Started by Daniel Pitts in sci.electronics.basics5 years ago 8 replies

So, I've learned the hard way that it isn't trivial to solder a LED matrix. I've actually extended that lesson to realize any non-planar...

So, I've learned the hard way that it isn't trivial to solder a LED matrix. I've actually extended that lesson to realize any non-planar graph adds difficulty to soldering. Anyway. I was trying to build a 5x5 LED matrix (because I only have 25 LEDs right now, and it seemed like a good start). I got two rows in, before I realized I wasn't going to be able to finish it the way I was t...


Soldering tiny (e.g. PLCC, LFCSP, CLCC) ICs

Started by ted in sci.electronics.basics11 years ago 9 replies

What do hobbyists do if the IC they want is only available in a tiny 5mm-on-a-side format, like CLCC? (I'm thinking, specifically, of...

What do hobbyists do if the IC they want is only available in a tiny 5mm-on-a-side format, like CLCC? (I'm thinking, specifically, of an accelerometer made by Analog Devices.) Are there snap-in adapters out there that would give me a more PDIP-like pin-out? I have seen suggestions, on sci.electronics.design, for how to solder the tiny buggers, but the implied soldering skill level seems wa...


non-destructively finding a break in an insulated DC wire

Started by Adam Funk in sci.electronics.basics3 years ago 15 replies

I have a wall-wart charger that put out 4.2 V DC on a figure-8 cable just over 1 metre long. There seems to be a weak spot or...

I have a wall-wart charger that put out 4.2 V DC on a figure-8 cable just over 1 metre long. There seems to be a weak spot or intermittent break in one of the wires --- sometimes it doesn't work but jiggling the cable makes it work. Is there any non-destructive way to find the position of the break? (I know I could cut it in half, test both halves, repeat as necessary, ... solder all the...


Charging lithium ion battery?

Started by Terry Pinnell in sci.electronics.basics2 years ago 3 replies

My ageing smartphone (an HTC Touch Pro 2, running Windows Mobile 6) has suddenly developed the show-stopping fault of refusing to charge any of...

My ageing smartphone (an HTC Touch Pro 2, running Windows Mobile 6) has suddenly developed the show-stopping fault of refusing to charge any of my five batteries. The smartphone itself is almost certainly faulty (I suspect an internal solder joint issue) but before I abandon it I want to try charging the batteries externally. With my DMM I've identified the two (outer) contacts of the four ...


Stripping Ribbon Cable

Started by eromlignod in sci.electronics.basics11 years ago 3 replies

Hi guys: I've got an application where I'd like to strip the ends of a ribbon cable, insert them through holes in a PCB and solder them...

Hi guys: I've got an application where I'd like to strip the ends of a ribbon cable, insert them through holes in a PCB and solder them in permanently. The holes are spaced at the same pitch as the ribbon wires. Is there an easy way to strip the ends without using a specialty tool? Don Kansas City