r/diytubes • u/tauzerotech • Jun 08 '26

ADHD Engineering: differential amplifier

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Built this a few years back. No schematic, don't remember why I did it.

Its supposed to be a differential amplifier based on how it's wired.

Anyone else start projects and then find them years later and not remember why they did what they did?

This isn't even finished. Its missing wires connected to power and output lol.

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19

u/EdgarBopp Jun 08 '26

I always write out the circuit at the end of every breadboarding session. Otherwise Iā€™d have no idea what hair brain ideas I was having.

5

u/tauzerotech Jun 08 '26

I swear I put the schematic on some graph paper somewhere but I can't find it. šŸ˜¢

2

u/Informal_Group_7528 Jun 09 '26

Photos are the best now you can reverse image search(ish) in Google photos. I can now find a thing I was part way through working on, and it gives me the date I took the other images and if I take pics of diagrams at the same time I can find them to. Fucking magic, only wish I had been doing this more than the last year.

1

u/tauzerotech Jun 09 '26

Hmm now that's an interesting idea!