$5 scrap pcb haul ($222) worth of ICs - Page 1
Forum section: electronics / general

author: Vertamps
author_rank: Contributor
timestamp: May 04, 2024, 05:42:58 am
content: Went to a scrapper today and pulled these out of a bin. $5 in scrap weight.Parts of note per bd:SG3503M : Precision 2.5V Ref (10 ppm/°C) @ $25 x 1OP227GN : Precision 2x Matched OpAmps 60uV Input Offset @ $12 x 2 ($24)VQ1001J : Quad N_Cannel Mosfets,30v 0.85Ω On-Resistance. 830mA x 3 ($10?)AM27C2048-1500C 2Mb Eprom x 3 ($10)4 x Analog comparators low pwr, 1.4mV offset ($5)Pulling them without damage is another story. Can clip and solder to a socket. This haul is light. Will upload other scrap hauls.

author: Vertamps
author_rank: Contributor
timestamp: May 04, 2024, 05:51:26 am
content: Also snagged an untested 3dfx V2 for $15. Iv actually sold a few of these for $185-200 on ebay recently. Will recap and test it. I have A Pentium 2 450Mhz system already setup with drivers.

author: tooki
author_rank: Super Contributor
timestamp: May 04, 2024, 02:05:05 pm
content: Quote from: Vertamps on May 04, 2024, 05:42:58 amLearn to desolder? Getting those out should be NO trouble at all.A proper vacuum desoldering iron makes short shrift of that.Otherwise, a nearly-forgotten desoldering tool — one that even an unskilled home machinist could make — is a desoldering bar: a special tip for your iron that fits onto all the pins of an IC or connector at once. Basically, a copper block with either holes for each pin, or a slot for a whole row of pins, connected to the hot end of a soldering iron. I got a vintage set of those from an old employer, and they’re surprisingly effective, especially for really big connectors.

author: themadhippy
author_rank: Super Contributor
timestamp: May 04, 2024, 02:38:15 pm
content: QuoteForgotten by some,but not by antexhttps://cpc.farnell.com/antex/b014a20/desolder-block-19mm-for-xs-series/dp/AN14A

author: coppice
author_rank: Super Contributor
timestamp: May 04, 2024, 07:26:05 pm
content: Quote from: Vertamps on May 04, 2024, 05:42:58 amA good solder sucker and a little practice works wonders. Just keep the pins wiggling in their holes for a second or two after you suck, so they don't bond again with the tiny amount of solder that remains in the holes. You can get a 16 pin out cleanly in a minute with some practice.

author: tooki
author_rank: Super Contributor
timestamp: May 06, 2024, 09:00:18 am
content: Quote from: themadhippy on May 04, 2024, 02:38:15 pmNice!!Weller still has a few, too.The partial set I have is from Adcola, which appears to have gone defunct years ago.

author: Vertamps
author_rank: Contributor
timestamp: May 07, 2024, 10:14:26 pm
content: Ill try my automatic solder sucking machine some time this week.I had tough luck reclaiming some $50 dacs that were really stuck in there through hole joints, i removed them with a hot air gun.One day i will have to test them and see if the heat did any damage.That will be a code/micro controller setup.I do have access to a table top reflow station at work i could try. Heats from the bottom and top if you want it to.-William

author: tooki
author_rank: Super Contributor
timestamp: May 07, 2024, 11:21:01 pm
content: Quote from: Vertamps on May 07, 2024, 10:14:26 pmYou mean you already have a proper desoldering tool? If so, then you just need to learn proper technique.See what I wrote recently in another thread:Quote from: tooki on March 22, 2024, 11:30:16 am

author: johansen
author_rank: Super Contributor
timestamp: May 08, 2024, 12:58:54 am
content: I blow the solder out of the hole instead of sucking it out.I typically use a bick pen as a tube to blow through after removing the ink stick.An air compressor would be even better

author: Brumby
author_rank: Unknown
timestamp: May 08, 2024, 03:19:22 am
content: Interesting approach. Basically the same principle as a super sucker - but with the solder going wherever it wants.Upon reflection, I realise I have done this sort of thing on the odd occasion - when there's been a simple extraction and the solder just won't clear the hole.

author: Vertamps
author_rank: Contributor
timestamp: May 08, 2024, 03:46:37 am
content: I could see myself hooking up some clear tubing to a pen shell. I think i can also revere the airflow on my machine.

author: S. Petrukhin
author_rank: Super Contributor
timestamp: May 08, 2024, 10:28:14 am
content: As a child, I held the PCB with pliers over the gas stove and then hit the edge of the table upside down - all the chips spilled out onto the floor.Later, PC motherboards served as a source of good and reliable MOSFETs. But I already had a soldering iron.

author: coromonadalix
author_rank: Super Contributor
timestamp: May 08, 2024, 10:41:39 am
content: Even if they are supposed to have 222$ parts value, they are worth nothing until you really need a part, not to remove them and store them, HOPING to get a value backyou'll accumulate tons of part and not really knowing if they really work, i've done that when i was younger, dismantled tons of cards, i had soooooo many partsyou know what .. after giving the most popular to a friend, i trashed the rest ... never used 1% of themyou want to recap a vga card,test it before doing anything with it,waste of time and ressources, the card could be dead before you play with it, or simply it work and was too old and simply not keptthe mentality to change this or thatbefore doing a basic test,is not good at all

author: S. Petrukhin
author_rank: Super Contributor
timestamp: May 08, 2024, 10:53:36 am
content: Quote from: coromonadalix on May 08, 2024, 10:41:39 amWhen I threw away the box with the old cables and adapters, I immediately needed one of them - there is such a joke.Things gathered around us become friends, create a company - it's always a pity to throw them away.The feeling that I have Atmel ICE and Pickit gives me peace, although I will never use the corresponding MCUs again.Suddenly, someone will need to help and restore something dear as a memory.I also have some old Soviet devices - they are never used and will never return my money, just for beauty and as a keepsake.

author: Vertamps
author_rank: Contributor
timestamp: May 08, 2024, 03:46:27 pm
content: Quote from: coromonadalix on May 08, 2024, 10:41:39 amI don't visit the recycler that often, usually adding some scrap pcbs on top of whatever retro pc or other electronic device i want is just a cheap cherry on top. If I see Analog Devices,BB im going to grab it out of creature of habit. Iv my cell phone on me while looking. But yet, i acquire TOO much, and am a tech glutton. I bought 5 oscilloscopes from them for $20-30 each. Turned out the circuit boards were covered with filth so they would not boot up right. Easy fixes - some missing knobs and a damaged screen. There is more to life than collecting test equipment and guitars. Im def at a dilemma to purge, i need to design stuff. Every piece of gear i buy i *need to refurbish it. Thats hindering my future at the moment.

author: JacobPilsen
author_rank: Regular Contributor
timestamp: May 22, 2024, 10:39:26 am
content: Quote from: Vertamps on May 08, 2024, 03:46:27 pmJust sell them.There are still many younger electronics enthusiasts without an oscilloscope.