Tool Location


Tool Type

Power Supply

Additional Information


A DC power supply output a direct-current voltage that can be used to power electrical components and circuitry. The CSI3003X has three outputs, two that provide variable DC voltages in addition to a constant 5 volt and 3 volt output.


Max Voltage

This tool can output a maximum of 30VDC 

Max Amperage

This machines has a maximum current output of 3A parallel or 6A in series.

Dual Output

This machine can provide two independent voltage sources.


The Benchtop Power Supply can be used to power any small project that draws less than 3 amps. It is an invaluable resource when working on a new project or repairing old electronics.


No special PPE is required to work with the Power Supply. Always take care to zero the voltage before turning on the Power Supply.

Safety Features

The Power Supply is protected by current limiting. If a circuit attempts to draw too much power, an internal fuse will blow.

Example Work

Basic LED Circuit
This is the electronics portion of the PI checklist. It provides an introduction to soldering, protoboards, LEDs, and resistors

Operational Amplifier Circuits

Operational amplifiers (Also known as op-amps) are very common circuit components that must receive DC power in order to function

How To Use This Tool

Figure 2 - Labels for reference

For startup procedure and equipment operation, reference figure 2. Before connecting the DC power supply to a circuit, turn it on by pressing button 5, labeled “POWER.” Rotate knobs until both supplies read 0.0V and 0A. Zeroing the power supply ensures that a voltage higher than expected will not be applied to the circuit.
The CSI3003X III allows for the control of the current and amplitude of the DC voltage supplied. In addition to the two variable supplies, a constant 5V supply is located in the center of the interface. The interface is:

  1. Current amplitude indicator
  2. Voltage amplitude indicator
  3. Voltage adjustment knob
  4. Up/Down current adjustment buttons
  5. Power on/off
  6. Negative output terminal
  7. Positive output terminal
  8. Ground connection
  9. Constant current indicator
  10. Constant current switch
  11. Parallel switch
  12. Series switch
  13. External power output connections

To power your circuit

  1. Follow start up procedure to zero the voltage.
  2. Connect required leads to the output and ground ports on the front of the power supply.
  3. Connect leads to circuit. Black to negative or ground, and red to positive. See figure 3 for an example.
  4. Power on the supply.
  5. Adjust voltage and current to desired value.
  1. Turn the knobs until the display reads 0.0V and 0.0A
  2. Disconnect your circuit from the power leads.
  3. Remove the power leads from the Power Supply
  4. Hang the leads back on the rack
  5. Clean up any used components or clutter from the workbench

Power supply is not turning on

  1. Disconnect power supply from circuit
  2. Check that the power supply is plugged into an outlet.
  3. If the supply is plugged in and still not receiving power, change it to another outlet.
  4. If power supply is connected to the electronics bench, ensure the bench is powered.
  5. If problem persists, ask a prototyping instructor for help. The internal fuse of the CSI3003X III may need to be replaced.


Circuit Specialists, Inc. (2018, July 7). CSI3003X3 User Manual. Retrieved from Circuit Specialists:

Author Information

Article was written by Alex DeBate, and edited by Reed Morris

Last Updated: September 4 2018.

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