The following components (DigiKey part numbers) have been ordered from DigiKey MAT14ARZ-ND matched transistors for CMS OPA129UB-ND low input bias op-amp for CMS INA128U-ND instrumentation amplifier for CMS 255-1953-ND optical switch for CMS 255-1470-5-ND optical switch for CMS OP27GSZ-ND surface mount op-amp 1N4001DICT-ND junction diode TMP36GSZ-ND temperature sensor OPA277UA-ND surface mount op-amp REG101NA-3.3CT-ND 3.3 volt regulator for Power 9163CA-ND SOIC breakout boards for testing 296-17205-ND Microcontroller chip for CPU MSP-FET43OU64 MSP 430 programmer for CPU LT3463EDD PBF-ND Micropower DC/DC converter for Power LT1678ISB PBF-ND Op-amp for VVS LT1492CS8 PBF-ND Dual op-amp 102-1385-1-ND DC/DC +-15 V converter (sub-optimal alternative for Power)