Rasdaq is a 8-channel 16-bit high-speed ADC solution using the Raspberry Pi, with current measurement adapters. Rasdaq was developed by ETF (The Student’s Association for Applied Electronics at the Faculty of Engineering (LTH), Lund University, Sweden) for academic research in power efficiency of graphic accelerators (GPUs).
An illustrated introduction is available here: http://etf.nu/projects/rasdaq
User manual and schematics are available in doc/.