Troubleshooting on CastrLabhttps://castrlab-blowfish-244231.gitlab.io/tags/troubleshooting/Recent content in Troubleshooting on CastrLabHugo -- gohugo.ioenluke@castrlab.com (Luke Paulson)luke@castrlab.com (Luke Paulson)© 2026 Luke PaulsonSat, 27 Jun 2026 00:00:00 +0000I spent a day debugging a buffer doing its jobhttps://castrlab-blowfish-244231.gitlab.io/posts/drifting-difference/Sat, 27 Jun 2026 00:00:00 +0000luke@castrlab.com (Luke Paulson)https://castrlab-blowfish-244231.gitlab.io/posts/drifting-difference/My ADC read random, noisy values run to run; there was no bug — with the high-impedance buffer enabled and nothing connected, I was watching input bias current charge the amplifier’s input impedance.Good Enough to Move On: Patching an ADS1255 Driver.https://castrlab-blowfish-244231.gitlab.io/posts/ads1255-driver-v1/Wed, 24 Jun 2026 00:00:00 +0000luke@castrlab.com (Luke Paulson)https://castrlab-blowfish-244231.gitlab.io/posts/ads1255-driver-v1/I started from someone else’s ADS1255 driver, fixed the original’s mistakes and a few of my own, added some quality-of-life features, and stopped the moment it was good enough to get back to testing the ADC.