Electronic DC Load using TLE2141
The circuit shown here is a low-cost electronic DC load designed to sink current from a power source. This test equipment can be used to test power devices such as power supplies, chargers, solar panels, and batteries. The board is built using op-amp TLE2141, LM385 provides the reference voltage. Resistor R11 acts as a shunt resistor and provides load current feedback to the op-amp, potentiometer P1 is provided to adjust the load current, and D1 is the power LED. A 10-turn Potentiometer is provided for fine current adjustment. The user may use a single-turn PR1 trimmer potentiometer. The load current range is up to 2.5A, and the project can handle higher currents with large-size heat-sink and forced air using a Fan. You may use a 0 to 5A Current Meter in series to measure the load current.
Features
- DC Power Supply 12V DC @ 20mA
- Load Up-to 2.5A and Up-to 24V
- On Board Power LED
- 10 Turn Potentiometer for fine Load current Adjustment
- Barrier Terminals for Load Connections
- PCB Dimensions 49.53 x 46.36 mm
- 4 x 3 mm Mounting Holes
Connections
- CN1: Pin 1,2 = VCC 12V DC, Pin 2,3=GND
- CN2: Pin 1 = Optional/External Ref In, PIN 2 = GND
- CN3: Pin 1 = +Load, PIN 2 = GND
- CN4: 10 Turn Potentiometer (Don’t Install PR1 if P1 is used)
- PR1: Optional Single Turn Trimmer Potentiometer.
- D1: Power LED
Share
The circuit shown here is a low-cost electronic DC load designed to sink current from a power source. This test equipment can be used to test power devices such as power supplies, chargers, solar panels, and batteries. The board is built using op-amp TLE2141, LM385 provides the reference voltage. Resistor R11 acts as a shunt resistor and provides load current feedback to the op-amp, potentiometer P1 is provided to adjust the load current, and D1 is the power LED. A 10-turn Potentiometer is provided for fine current adjustment. The user may use a single-turn PR1 trimmer potentiometer. The load current range is up to 2.5A, and the project can handle higher currents with large-size heat-sink and forced air using a Fan. You may use a 0 to 5A Current Meter in series to measure the load current.
Features
- DC Power Supply 12V DC @ 20mA
- Load Up-to 2.5A and Up-to 24V
- On Board Power LED
- 10 Turn Potentiometer for fine Load current Adjustment
- Barrier Terminals for Load Connections
- PCB Dimensions 49.53 x 46.36 mm
- 4 x 3 mm Mounting Holes
Connections
- CN1: Pin 1,2 = VCC 12V DC, Pin 2,3=GND
- CN2: Pin 1 = Optional/External Ref In, PIN 2 = GND
- CN3: Pin 1 = +Load, PIN 2 = GND
- CN4: 10 Turn Potentiometer (Don’t Install PR1 if P1 is used)
- PR1: Optional Single Turn Trimmer Potentiometer.
- D1: Power LED
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