Posted in Arduino Hacks, Tool Hacks Tagged arduino, constant current, constant voltage, load, programmable load Current Limiting Diode Use And Tutorial January 6, 2014 by Todd Harrison 20 Comments ...

Drive the gate of the FET with an op-amp that maintains either constant current or constant voltage. Control everything with a DAC, and you have a programmable load controlled by an Arduino.

The LT3954, a DC/DC converter designed to operate as a constant-current source and constant-voltage regulator with an internal 5A switch, is now available from Linear Technology. The LT3954, a DC ...

Figure 1 A tester of AA- or AAA-sized batteries uses constant-current load. Click to enlarge . The circuit uses a 9V battery and a voltage regulator to produce a steady power-supply voltage of 5V.

3. Shown are PSpice results of the circuits in Figure 2 for −55°C, 25°C, and 125°C. The simple circuit in blue has the most change over applied voltage.

The easiest way to turn a simple dc/dc converter into a constant-current source is to use a sense resistor to convert the output current to a voltage and use that voltage as the feedback. The problem ...