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How to build a hybrid solar/wind energy harvester?

STM32F100: why and how to use the internal reference voltage for ADC?

One of our main development boards is the  STM32VLDISCOVERY. Its st-link is an in-circuit debugger and programmer, and makes development for prototyping fast and easy. The board has an ‘interesting’ property though: its reference voltage is labeled 3.3V while it is actually… only 3V. Check out the picture for proof!   After reviewing the board schematics we found […]