Anybody remember this 80's magazine circuit? - Page 1
Forum section: electronics / general

author: throbscottle
author_rank: Contributor
timestamp: November 06, 2024, 11:49:15 pm
content: It's a long shot I know. I think the mag might have been Practical Electronics, mid 80's. The circuit was a SLA battery charger based on a LM3900.I no longer have any interest in SLA batteries, but I've been looking for LM3900 circuits to study and I remember I was going to build it at the time but never got round to it.Does anybody remember this - able to provide a scan, even?

author: themadhippy
author_rank: Super Contributor
timestamp: November 07, 2024, 12:21:49 am
content: might be in herehttps://www.worldradiohistory.com/Practical_Electronics.htmthe december edition of each year often has the index of all the projects for that year

author: Kim Christensen
author_rank: Super Contributor
timestamp: November 07, 2024, 12:23:43 am
content: Don't remember that one in particular, but TI put out a niceapplication note for the Lm3900.

author: watchmaker
author_rank: Unknown
timestamp: November 07, 2024, 12:43:34 pm
content: Quote from: themadhippy on November 07, 2024, 12:21:49 amThe full issues can be found on Internet Archive:https://archive.org/search?query=practical+electronics

author: Andy Chee
author_rank: Super Contributor
timestamp: November 07, 2024, 02:02:00 pm
content: On a slight tangent, make sure you download those articles/magazines, you'll never know if internet archive goes offline again.... the next attack could be irrecoverable.

author: throbscottle
author_rank: Contributor
timestamp: November 10, 2024, 12:30:00 am
content: Immediately after I posted the question I found the archive athttps://www.worldradiohistory.com/Practical_Electronics.htmso I've been looking through those. No joy so far. Always find interesting stuff in the past though. I keep stopping to read...After a bit more thought, it might have been early nineties by which time there was a chance I'd seen it in EE or possibly Elektor, or even somewhere else.So I'm going to be having some fun with this one!Thanks so much for the archive link - don't know why I didn't think of them myselfAlready read the app note

author: Zoli
author_rank: Frequent Contributor
timestamp: November 10, 2024, 12:46:53 am
content: Quote from: throbscottle on November 10, 2024, 12:30:00 amCheck the app note date.

author: quadtech
author_rank: Regular Contributor
timestamp: November 11, 2024, 06:27:12 pm
content: Elektor had a charger based on the L200https://theslowdiyer.wordpress.com/2014/12/28/project-files-sla-battery-charger/https://www.legallou.com/Modelisme-Tech/ChargeurBatterie12v/Kit.html

author: Xena E
author_rank: Frequent Contributor
timestamp: November 11, 2024, 06:57:02 pm
content: Use 'Norton' as a search word.X.

author: throbscottle
author_rank: Contributor
timestamp: November 23, 2024, 12:46:46 am
content: Well so far no luck finding it. Thanks for all the tips though - it has led to some interesting other stuff and some other LM3900 circuits to look at, so I'm happy-ishXena E - Norton brings up many related thingsquadtech - it's not that I need a battery charger, it's because I wanted to study the circuit, since I didn't understand it when I read the article originally, but now I am all curious because I have some LM3900's to play with.Zoll - I know the app note is dated 1972!

author: Kim Christensen
author_rank: Super Contributor
timestamp: November 23, 2024, 02:43:06 am
content: Not sure if it's from the same magazine, but it's from the same era.PDF:

author: hgl
author_rank: Regular Contributor
timestamp: November 23, 2024, 05:56:37 pm
content: Quote from: throbscottle on November 06, 2024, 11:49:15 pmQuote from: watchmaker on November 07, 2024, 12:43:34 pmyou can search worldradio radio directly for lm3900https://www.worldradiohistory.com/IDX2/search.cgi

author: Xena E
author_rank: Frequent Contributor
timestamp: November 23, 2024, 07:49:50 pm
content: Quote from: throbscottle on November 23, 2024, 12:46:46 amGood introduction here:https://americanradiohistory.com/UK/Bernards-And-Babani/Babani/Babani-BP50-LM3900-Projects.pdf#search=%22lm3900%22

author: lokin4areason
author_rank: Contributor
timestamp: November 27, 2024, 02:10:34 pm
content: am so digging these digital link(s) to the archive(s)thanks for the share . . . .any luck in locating the material in that is being addressed ?