Re:load is low cost adjustable constant-current load with self-powered (passive). The circuit is simple and easy to build. It uses BTS117 FET as main pass element. The FET has built in ESD, overcurrent, overvoltage, and over temperature protection, making them ideally suited for a dummy load. MCP6002 op-amp is used in this project because it […]
This project shows you how to build a simple constant current sink which can be used to simulate a DC dummy load. It can help you test cheap DC-DC converters to see if they really put out the amount of current as advertised. The circuit is quite simple, a voltage follower or buffer using opamp.
The purpose of project is to build dummy (artificial) load for testing DC power sources. This device uses MOSFET transistors for power dissipation so it has two advantages over resistive loads: it is linear and load current is stabilized by M16C/28 microcontroller so required current value is constant regardless of voltage change.
The dummyload project simulates loads from zero to 1000 mA to help characterize new power supply designs. This design can present a single load to the supply, or it can toggle between two loads with a selectable period and duty cycle. The project is built around microcontroller AVR ATmega169.
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