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| Acmlm's Board - I2 Archive - Hardware/Software - Electronics questions |
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HyperLamer <||bass> and this was the soloution i thought of that was guarinteed to piss off the greatest amount of people Sesshomaru Tamaranian Level: 118 Posts: 6036/8210 EXP: 18171887 For next: 211027 Since: 03-15-04 From: Canada, w00t! LOL FAD Since last post: 2 hours Last activity: 2 hours |
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I need to desolder some really small chips from their circuit boards. Normally this is no problem with a good desoldering iron (same as a soldering iron, but with a bulb attatched that sucks up the goo); just flip the board over and remove the solder from the pins on the bottom. There's a problem, though - the pins don't poke through! They're only soldered on one side of the board, and if I tried to get close enough to remove them from there I'd only end up melting them together or destroying the chip entirely. So how do I get it off the board? (Doesn't matter if I wreck the board in the process, but I'm going to need the chip and pins intact.  )[edit] Well I got them off by pretty much prying the pins off the board... Be nice to find a better way though, since this is messy and broke off a few pins.  One chip only has two broken, one of which doesn't do anything anyway, so that's good... The other is labelled 'CE#' and is apparently used to put the chip in a low-power mode when held high. (It's an EEPROM, BTW. SST-29LE010 in particular.) If I just don't connect that, will it stay low? It'd be a real pain to try to connect something to the little stub left sticking out.(edited by HyperHacker on 07-24-05 11:19 AM) |
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neotransotaku Baby Mario 戻れたら、 誰も気が付く Level: 87 Posts: 3646/4016 EXP: 6220548 For next: 172226 Since: 03-15-04 From: Outside of Time/Space Since last post: 11 hours Last activity: 1 hour |
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| SST? hmm...my dad works for SST, so I'll try talking to him for ya... if you can draw out the chip and label which pins are broken, i can give my dad more context | |||
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HyperLamer <||bass> and this was the soloution i thought of that was guarinteed to piss off the greatest amount of people Sesshomaru Tamaranian Level: 118 Posts: 6046/8210 EXP: 18171887 For next: 211027 Since: 03-15-04 From: Canada, w00t! LOL FAD Since last post: 2 hours Last activity: 2 hours |
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| I dunno about drawing, but it's CE# and a non-connected pin that aren't there. Looking at the documentation, this shouldn't be a problem as long as CE# stays low, but I'm not sure it will. BTW, how do you use a crystal? They only have 2 leads, and somehow create a pulse. Do they just like open and close the circuit 14 million times a second? (I'd test if I could. ) |
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neotransotaku Baby Mario 戻れたら、 誰も気が付く Level: 87 Posts: 3652/4016 EXP: 6220548 For next: 172226 Since: 03-15-04 From: Outside of Time/Space Since last post: 11 hours Last activity: 1 hour |
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| My dad says: CE pin is used to select the chip (to read data from memory) when its state is low and deselect the chip (no data in memory can be accessed) when its state is high. CE pin can not be float, either connects to gnd or vcc. so, it appears you need to set the pin to ground to do what you want.. as for using crystals--it appears they just resonate according to the effects the produce in electronics. So, I'd just worry about orientation of the two leads in respect to the circuit (edited by neotransotaku on 07-25-05 05:30 PM) |
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