Has anyone on here played with pummer circuits?

[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).

[mle_online@social.afront.org]

@ai6yr ya, that's plenty!

[petrillic@hachyderm.io]

@bytex64 @MLE_online I would love this in PartsDB. At least inside a closed network.

[bytex64@awesome.garden]

@MLE_online Also does it have to be AC? Would a cheaper HC or LS part work or do you need the 100MHz speed?

[bytex64@awesome.garden]

@MLE_online @petrillic Yeah, I’ve been thinking some kind of static export plugin that can just generate an inventory page would be neat for that.

[mle_online@social.afront.org]

@bytex64 that I don't know. I was just going by the schematic

[petrillic@hachyderm.io]

@bytex64 @MLE_online SiliconSocial.

[bytex64@awesome.garden]

@MLE_online I’m reading the Make article about it, which uses an AC240, and it definitely doesn’t need it. It’s just doing some low speed switching. Any kind of inverter with enable would work.

FWIW I have a “solar light controller” design that just uses a single transistor. It only uses a single NiMH cell though, so something will have to step up the voltage on the output (I use a joule thief). https://dominionofawesome.com/vca/doodles/solar-light-controller/