Mineral spirits aren't alcohol. A specific type of alcohol was not specified because it doesn't matter.
If you go into any local shop, be it a grocery store or drug store or hardware store or electronics shop, and look for a container that says "alcohol" the most likely things you will encounter will be either isopropyl or denatured. Either of those are fine. Similarly you might encounter concentrations anywhere from 70% to 99.9% with water. Any of those are fine too. I wouldn't use vodka and I wouldn't expect to need to be told explicitly not to use vodka, simply because something sold as a drink, even everclear, probably has other junk in it besides the alcohol itself, and the goal is to clean something. But if you happen to have pure clean distilled ethanol, and want to waste it on washing electronics, it'll work and won't hurt anything. In an electronics shop you can get 99.9% isopropyl which is good for drying things out. But really, just read the label or web site for the flux you have or are thinking of getting, and it tells you how to wash it. Different fluxes have different ideal solvents, but alcohol, of any variety, works on all of them, and doesn't hurt most components or pcbs. It really not some arcane secret or unguessable mystery. -- bkw On Mon, May 7, 2018, 8:38 PM Bob Pigford <[email protected]> wrote: > Diggy, > > > > I have wondered about just this question. After all, there are several > types of “alcohol”, like methanol, ethanol, rubbing alcohol, mineral > spirits, de-natured alcohol, etc. > > > > I hope that someone on the list will PLEASE tell me which (specifically) > kind of “alcohol” to use to wash off the remaining rosin flux from my hand > soldered circuit boards. > > > > Thank you! > > > > Bob Pigford > > > > *From:* M100 [mailto:[email protected]] *On Behalf Of *Diggy > Dude > *Sent:* Monday, May 07, 2018 12:00 PM > *To:* [email protected] > *Subject:* Re: [M100] 8K RAM module > > > > Brian, > > Gotcha. What would you clean it off with? Acetone? Ethanol? De-Oxit? > > > > On Mon, May 7, 2018 at 10:35 AM, Brian White <[email protected]> wrote: > > He meant that after building, the flux must be washed off. You can't leave > the dried flux in there, even if it is "no-clean" flux, because the flux > will leak enough current to matter. > > > > On Mon, May 7, 2018, 10:42 AM Diggy Dude <[email protected]> > wrote: > > To make sure I understand: > > Clean all pads and leads with flux.Will a flux pen suffice, or should > liquid flux be used? > > What specific 74HC and SRAM devices do you use? > > > > On Mon, May 7, 2018 at 2:45 AM, Francesco Messineo < > [email protected]> wrote: > > On Mon, May 7, 2018 at 9:08 AM, Diggy Dude <[email protected]> > wrote: > > Thanks, Fugu! > > > > So the modern solution is a single SRAM and capacitor on a SOIC-to-DIP > > breakout? What's the RAM chip they're using? > > and a logic chip (there're a few different approaches here) to combine > the separate chip selects to a couple of addresses and a single select > signal. My own version of the circuit uses the fewest ports possible > (at least if nobody comes up with a different approach I couldn't > think of). > The RAM chip must be a CMOS static ram, 8kx8 and with low power > standby (not all have this feature). The original 8k modules were > specified for 4 uA max standby current, that allows the standby > battery to keep the RAM content for over a month. Usually the suitable > chips have L or LL in the part number, but you better check the > datasheet for the fine details. Most of the suitable RAM chips have a > measured standby current of 0.1 uA (often less) at 3.3V if the chip > select are driven with the correct voltages. At these current levels, > cleaning the soldering flux is a must. I've measured up to 15 uA of > standby current on badly cleaned modules. YMMV. > Glue logic *must* be 74HC family, it has a suitable current draw at > 3.3V standby and suitable speed. In one case I've used 74AHC and it > worked well too. > > > > > > -- Jim > > > > On Sun, May 6, 2018 at 10:29 PM, Fugu ME100 <[email protected]> wrote: > >> > >> You could try > >> > https://www.arcadeshopper.com/wp/?page_id=11#!/8k-RAM-module-for-Model-100/p/104430801/category=28313042 > >> > >> They have the M100 modules if you want to buy. > >> > >> If you want to build your own there are PCBs on OSH Park for surface > mount > >> and DIP versions. > >> > >> No need for any pillaging :) > >> > >> From: M100 <[email protected]> on behalf of Diggy Dude > >> <[email protected]> > >> Reply-To: <[email protected]> > >> Date: Sunday, May 6, 2018 at 8:13 PM > >> To: <[email protected]> > >> Subject: [M100] 8K RAM module > >> > >> Anyone know where I can get an additional 8K for my 24K M100 without > >> pillaging another M100? Let's face it: if I got another M100, I'd be > >> inclined to leave it intact. > > > > > > > > >
