DC Power Supplies Intro to ECSE Analysis K. A. Connor Mobile Studio Project Center for Mobile Hands-On STEM SMART LIGHTING Engineering Research Center ECSE Department Rensselaer Polytechnic Institute Intro to ECSE Analysis

Outline Batteries Fixed DC Supplies Variable DC Supplies Current Limited Voltage Supplies What Else?

+ + + Batteries 9V Battery & Connector Red is plus (+) and Black is minus (-) Can be either a +9V (Black grounded) or -9V DC (Red grounded) supply + + + 20 November 201820 November 2018

Batteries Many Types – All with ± Symbols for Polarity 20 November 201820 November 2018

+ Generic DC Supply Black Box Circuit Symbol Black Box Output Note: Can always be connected in either direction to be positive or negative source. 20 November 201820 November 2018

Fixed Power Supplies 20 November 201820 November 2018

Bench Top Supplies Single or Multiple Output Fixed or Variable Output Current Limiting Voltage Supply Nearly All Can be Connected in Either Direction 20 November 201820 November 2018

HP E3631A Again, the 3 power supplies can be connected in either direction. 3 1 2 Case Ground 20 November 201820 November 2018