How can I get precise pH readings of a vinegar solution without a pricey meter?

[EvelynW]

I’ve been trying to measure the exact pH of a homemade vinegar solution I made from fruit scraps, but my cheap litmus paper strips just show a vague orange color that could be anything between pH 4 and 6. I’m wondering if building a simple probe with a microcontroller would give me more precise, repeatable readings for these kinds of kitchen chemistry projects, or if that’s overcomplicating it for a hobbyist.

[TimothyQR]

I did the same with a cheap pH sensor hooked to a tiny microcontroller after my litmus strips couldn't tell me enough. It spit out numbers, but calibration drift and temperature sensitivity made the readings unreliable fast.

[CamilaJ]

I tried going down that road and it felt like overkill for kitchen projects. The sensor needed stable reference solutions and a clean flow, which is hard to keep in a random vinegar on the counter.

[Jerry4]

I stuck to color matching and mapped the shades to estimates of acidity in a simple spreadsheet. It was clunky, but I could at least track changes batch to batch without worrying about drift in sensors.

[SophiaM]

I keep thinking maybe the real snag is that fruit scraps ferment unpredictably; I once dumped a batch that smelled right but tasted off, so I recalibrated my expectations rather than the meter. Do you think that's the real problem?