- does overcharging _lithium_ batteries release _hydrogen_? - 2 Updates
- 7805 regulator source? - 8 Updates
| danny burstein <dannyb@panix.com>: Jan 09 01:40PM |
| "Peter W." <peterwieck33@gmail.com>: Jan 09 08:16AM -0800 Short answer is: Not under typical conditions and/or with a correct charger. However: The electrolytes are flammable, and lithium itself is highly flammable. So, if the battery is overcharged and starts to leak, the released materials can cause fires and release a great deal of energy. Or if the battery is physically damaged such as a cracked casing or similar. Peter WIeck Melrose Park, PA |
| dplatt@coop.radagast.org (Dave Platt): Jan 08 08:55AM -0800 In article <98294110-cf93-4521-9c09-ea8878da3bfcn@googlegroups.com>, >> be a Chinese clone. Might this be a problem down the road, or should I >> order a better brand and what are your suggestions? Thanks. >a) A princely $0.65 from Digi-Key. And, if you download the Digi-Key paper order form, fill it out by hand, and mail it to Digi-Key with a check for the full cost of the component, they'll pay the shipping charge. Yes, they're still offering this service (as of about three months ago) although they don't go out of their way to publicize it. > - Yes, but in such a way as to cause additional cascade failures - so you are putting the device at-risk. > - No. >In fewer words: Don't be stupid. "Cheap is often very expensive." |
| Jake T <jaketbone@steak.com>: Jan 08 12:14PM -0500 On 1/8/22 11:55 AM, Dave Platt wrote: > component, they'll pay the shipping charge. Yes, they're still > offering this service (as of about three months ago) although they > don't go out of their way to publicize it. Wow, I never knew this! Do I go ahead and pay shipping for which they'll refund later, or just pay for the device? |
| John Robertson <spam@flippers.com>: Jan 08 09:59AM -0800 On 2022/01/08 9:14 a.m., Jake T wrote: >>> - No. >>> In fewer words: Don't be stupid. >> "Cheap is often very expensive." Are there no electronic supply stores in your city/state? I'd try them first. I do use DK and Mouser and Element 13 of course, but for single and small orders I go to my local electronics supplier. In my case (Vancouver/Burnaby, BC, Canada) it is https://www.rpelectronics.com - They have a showroom you can wander around in, perfect for hobbyists and hunting for something you can't recall the name of! John :-#)# -- (Please post followups or tech inquiries to the USENET newsgroup) John's Jukes Ltd. MOVED to #7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3 (604)872-5757 (Pinballs, Jukes, Video Games) www.flippers.com "Old pinballers never die, they just flip out." |
| Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net>: Jan 08 02:25PM -0500 John Robertson wrote: > They have a showroom you can wander around in, perfect for hobbyists and > hunting for something you can't recall the name of! > John :-#)# RP Electronics? I wonder if they're the successor to the old Rendell-Paret shop on 4th and Arbutus in Vancouver. That was a real old-timey ham shop--stuff stacked to the rafters, and old Hedley Rendell chain-smoking behind the counter. I used to buy stuff there when I was a kid. Freaking ex-pen-sive compared to now. Cheers Phil Hobbs -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC / Hobbs ElectroOptics Optics, Electro-optics, Photonics, Analog Electronics Briarcliff Manor NY 10510 http://electrooptical.net http://hobbs-eo.com |
| Phil Allison <pallison49@gmail.com>: Jan 08 01:41PM -0800 John Robertson wrote: ================== > Are there no electronic supply stores in your city/state? I'd try them > first. I do use DK and Mouser and Element 13 of course, ** Element 13 ?? Aluminium ? |
| dplatt@coop.radagast.org (Dave Platt): Jan 08 08:05PM -0800 >> don't go out of their way to publicize it. >Wow, I never knew this! Do I go ahead and pay shipping for which >they'll refund later, or just pay for the device? Just pay for the device, and include your local sales tax if any. Don't pay for shipping. To quote from their current Terms and Conditions document: "6. Shipping Charges. "Products Shipping from Digi-Key's Warehouse. Except as otherwise provided on the Site, (1) shipping or freight charges and insurance will be paid by the customer*, (2) all sales are made FOB Digi-Key's warehouse in Thief River Falls, MN, USA, and (3) shipping or freight charges from Digi-Key's warehouse in Thief River Falls, MN, USA are prepaid and added to the invoice, billed collect or billed to a third party. "* When a check or money order accompanies your order, Digi-Key pays all shipping and insurance (our choice for method of shipping) to all addresses in the U.S. and Canada." "Our choice of method for shipping" has always worked out to be the same as their basic-price ground shipment, in my experience. The two or three times I've used this method, I've not had a package delayed unduely through having been sent on a slow horse via Mongolia, or anything like that. As far as I know there's no way to take advantage of this if you're using their online ordering system, as you can't have a check or money order "accompany your order". It might be possible to start the process of order entry and then print out your "cart" and mail in the printout, but I'm not sure this would give them all of information needed to process the order. I just download the PDF of their paper order form, print it, fill it out by hand, and mail it with a check. If I write my Digi-Key customer number in the right place, I even get an email from them when they process the order. This manual process is a nice thing if you want to order just one or ten small items (where the parts cost is less than their normal shipping charge) and you don't mind the order taking an extra week or so. |
| John Robertson <spam@flippers.com>: Jan 08 11:27PM -0800 On 2022/01/08 11:25 a.m., Phil Hobbs wrote: > compared to now. > Cheers > Phil Hobbs I take it you grew up in Vancouver, BC. I started out in Toronto. Great surplus stores in Toronto back in the 60s! You knew Rendell Paret back in those days? I used to love hanging out in that old shop too, along with the other electronics surplus store (run by Peter - AIR) at Main and 17th or there about. Peter had very nice monstrous TEK surplus oscilloscopes that I couldn't afford back in the late 70s and early 80s...And of course Main Electronics around Main and 29th - but they are all gone now. RP sold out to Andrew back in the 90s I believe and he kept the name ever since. No longer surplus, which is a shame, but that market kinda dried up. And the High schools in Vancouver no longer have electronics as a course - although they do have robotics and other tech classes. John :-#)# |
| John Robertson <spam@flippers.com>: Jan 08 11:29PM -0800 On 2022/01/08 8:05 p.m., Dave Platt wrote: > ten small items (where the parts cost is less than their normal > shipping charge) and you don't mind the order taking an extra week > or so. You could dig out an old Digi-Key catalogue and use the order page from that - I assume - to get your free shipping. Photocopies would probably be fine. John :-#)# -- (Please post followups or tech inquiries to the USENET newsgroup) John's Jukes Ltd. MOVED to #7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3 (604)872-5757 (Pinballs, Jukes, Video Games) www.flippers.com "Old pinballers never die, they just flip out." |
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