parts ----- 2x 1uF ceramic caps 0805: 80-C0805C105K4R 2x 0.1uF ceramic caps 0805: 80-C0805C104K5R 1x 4.7uF electrolytic cap: 647-UWX1V4R7MCL1 1x PCB-mount 4-contact male 3.5mm jack: 490-SP-3541 1x micro USB connector: 538-105017-1001 1x mcp1702 1.8v LDO voltage regulator: 579-MCP1702T1802E/CB 1x ft232rl USB-serial UART: 895-FT232RL Approximate BOM cost: 8 euros