As a workaround for the noisy 3.3V ADC of STM32 and LPC17, I developed a new solution with an external ADC. I selected the MCP3208, since it's available for only 2.75 EUR at Reichelt. It offers a resolution of 12bit. The driver development was straightforward, and I must say that I'm very satisfied with the results! :) The ADC is accessed via SPI (e.g. J19 of the MBHP_CORE_LPC17 module). A 74HC595 has been added and is accessed via SPI as well, so that no additional IO pins o