02 Nov '17, 4pm

Part 2 of Bill Wachsmann's amp-hour logger story

Part 2 of Bill Wachsmann's amp-hour logger story

In this follow on to Part 1 of his story, Bill describes putting to use the amp-hour logger that he built using a microcontroller and a clamp-on ammeter. This time he discusses modifying the amp-hour software so it can be used as an analog input logger to measure solar and wind power. A small solar cell and a homemade windmill are used.. By William Wachsmann FIGURE 1 Amp-hour log for the Office Circuit over 24 hours. It adds up to 14.728 A-hours and 1.767 kW-hours at 120 V. In November and December 2016, I monitored all the circuits in my house. Some of the results were eye opening. We have a shed/workshop that is spray-foam insulated, where—among other things—we store paint cans. It’s heated by a 240-V baseboard heater and in the winter, we keep the temperature at around 10°C or about 50°F. The amp-hour logger showed that the heater was coming on about 3 times each hour a...

Full article: http://circuitcellar.com/cc-blog/logger-device-tracks-amp...

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