Create the initial power-entry stage for the SAR acquisition board. Place exactly TWO components only: 1. J1: * Type: 2-pin DC power input connector * Function: main 5V power entry 2. C1: * Value: 10uF * Type: ceramic capacitor * Function: bulk input capacitor Create these nets: * +5V_MAIN * GND Connections: * J1 pin 1 → +5V_MAIN * J1 pin 2 → GND * C1 positive terminal → +5V_MAIN * C1 negative terminal → GND Rules: * Do NOT place any additional components * Do NOT create PCB layout or routing * Keep schematic clean and readable * Use proper power symbols and net labels Goal: Establish the main 5V power input stage for the SAR acquisition system.