2.1.1 J1, J2, and J3 – Power Supply Connectors

J1 and J2 are two-pin headers for easy connection of a lab power supply. Connect a positive input voltage between 3.6 V and 6 V to J1 and 0 V (ground) to J2. The lab power supply current limit has to be set to at least 1 A.

J3 can be connected with a 5-mm × 2.5-mm barrel connector of the type commonly used with low-cost AC adapters. The inner contact is positive (5 V) relative to the outer contact (GND). Possible wall adapters could be Egston P2CFSW3–5 V/1.2 A, 5.0 VDC, 1.2 A with universal connector set (make sure that the orientation of the connector is correct) or SL Power Electronics PW170KA05V/2A with the right country connector.