Has anyone on here played with pummer circuits?

[justinto@mas.to]

@MLE_online oh, I could use fast access to McMaster Carr parts! The cost of shipping constantly stops me from building things and I always forget a part or two to finish the project. In my last job I had access to almost any component that I needed and it spoiled me to the point where I don't build much anymore. I hope a friend finds you a chip in their supplies

[stormgren@obsidianmoon.com]

@MLE_online I mean, it's not going to be an exact science, but resistors, caps, and whatnot come in assortments so that's an easy setup. Cruft extra parts and donations tend to accumulate so that also helps, and sometimes you need to just do a mouser order and group brainstorm stuff that people said "wow, I wish we'd had a $foo sitting around, could have used one the other day to fix a thing" and stock up. Then curate every so often.

I have a pile of stuff personally that's accumulated over the years, so it's hard for me to judge, but any time I order parts, I usually get a couple of extra if it's not too much, ICs don't tend to take up a lot of room.

(The 74AC240 isn't an uncommon logic chip, or at least it didn't used to be)

[stormgren@obsidianmoon.com]

@ai6yr @MLE_online I was just doing the same thing here, I would swear I've got some around here I could part with.

[mle_online@social.afront.org]

@acesabe yea, i order from aliexpress, and the prices are good, but im not going to mail order a single chip from china

[mle_online@social.afront.org]

@RueNahcMohr you always say canadian mail is extremely slow and unreliable though!

[mle_online@social.afront.org]

@ai6yr @Stormgren if you do and can, that would be amazing

[johns_az@mastodon.social]

@RueNahcMohr @MLE_online
Or me. (why I save scrap PCBs with socketed parts) hehe

[ai6yr@m.ai6yr.org]

@MLE_online @Stormgren MC1488 quad line driver should work, it's the same thing but 4x instead of 8x.

[ai6yr@m.ai6yr.org]

@MLE_online @Stormgren Hmm, I guess don't have the enable. Not sure if that's necessary... I have more I can go look at lol. https://www.ti.com/product/SN74AC240#tech-docs

[mle_online@social.afront.org]

@ai6yr @Stormgren What's enable?

you would know better than me. This is the circuit I was planning to build

[stormgren@obsidianmoon.com]

@ai6yr @MLE_online Yeah, the enable is required to keep the circuit from triggering as long as solar input is present, if I am understanding the circuit correctly.

[mle_online@social.afront.org]

@Stormgren @ai6yr oh, an enable pin

[johns_az@mastodon.social]

@MLE_online
What circuit are you going to build? I see quite a few out there.

[mle_online@social.afront.org]

@JohnS_AZ this one seems simple and easy enough

[ai6yr@m.ai6yr.org]

@Stormgren @MLE_online Ah, then the ones I have won't work for the enable. Lemme look at my other pile, lol.

[johns_az@mastodon.social]

@MLE_online hmmm, I think I have everything except the nicads.

[mle_online@social.afront.org]

@JohnS_AZ I am planning to just use a couple supercaps in place of the batteries

[ai6yr@m.ai6yr.org]

@Stormgren @MLE_online look! DM the address to send them to. Lemme find some static safe foam and a little box

[bytex64@awesome.garden]

@MLE_online FWIW, Mouser does have a somewhat hidden economy shipping option that’s $6. But yeah, still bananas for a single part.

I’ve been doing inventory on my parts and it occurs to me that I have a lot of extra stock I could share, if only there were some way to do it. I’ve thought it would be neat to have some kind of parts-share site that would allow you to find someone local who has an extra chip or 50K pot or whatever. I think safety might be an issue for sharing mailing addresses. I dunno.

[ai6yr@m.ai6yr.org]

@Stormgren @MLE_online Four enough? (not that I have ever used these once in the 20? years they have been in my garage).