https://sensorrig.com/tags/ads1115/Recent content in Ads1115 on SensorRig — Real Raspberry Pi Sensor MonitoringHugoen-usThu, 27 Aug 2026 00:00:00 +0000https://sensorrig.com/posts/ct-clamp-burden-resistor-calibration-ads1115/Thu, 27 Aug 2026 00:00:00 +0000https://sensorrig.com/posts/ct-clamp-burden-resistor-calibration-ads1115/When measuring AC current with a CT clamp (SCT013) and an ADS1115 ADC, voltage drift makes readings unreliable — a problem that surfaces repeatedly in Home Assistant communities and DIY sensor projects. This builds on my earlier whole-house energy monitor with CT clamps and an ADS1115 and uses the same asyncio collector that logs the rest of my house; the burden-resistor detail below is the one piece I left vague in that first post.https://sensorrig.com/posts/ct-clamp-ads1115-energy-monitor/Sun, 09 Aug 2026 00:00:00 +0000https://sensorrig.com/posts/ct-clamp-ads1115-energy-monitor/The problem I started with: I wanted whole-house current on the two 120 V legs of my panel without buying a commercial energy monitor, and I already had an ADS1115 breakout and a Pi collector running my DS18B20 probes and a DHT11 on the same asyncio collector loop. What I did not appreciate at the time is that an ADS1115 is the wrong shape of ADC for mains current, and that everything downstream is an exercise in managing that mismatch honestly rather than pretending it away.