Product was successfully added to your shopping cart.

Go to cart page

You have successfully subscribed to this product. You will receive an email when the product is in stock.

Symmetric 1a power supply

Velleman K8042: Symmetric 1A Power Supply Kit

Velleman K8042

Velleman K8042: 1 Amp DC Power Supply

The K8042 board is a small, universal 1 amp symmetric power supply ideal for a variety of op-amp applications. The board has three outputs which are controlled through trimpots. Positive and negative outputs are adjustable between 1.2 and 24VDC and regulated seperately. For continuous adjustment of output voltage, board trimmers can be replaced with potmeters.

Basic assembly and soldering required with this kit. The K8042 does not come with a heatsink or transformer so you can select components that best suit your needs with the power supply. However, for maximum 20W dissipation, we recommend the Velleman HS4003.



  • Output current: up to 2 x 1A continuous (with suitable heatsink)
  • Max. input voltage: 2 x 24VAC
  • Dimensions: 3.1 x 2 x 0.9"


  • Low ripple
  • Short circuit protection
  • Thermal protection
  • LED output indicators
  • Compact size
  • Good line and load regulation

Additional Information

Difficulty Level 3


Parts list
English assembly instructions through illustrations, pictures, etc.

Assembly instructions
Written multilingual manual explaining how to build the kit

Info Sheets

Resistor colour code

Overview of Velleman modules that are equal to D.I.Y Kits
This sheet is useful when you want to know which modules you could find in the do-it-yourself range of Velleman Kits and minikits.

 Warning: this product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to: www.P65Warnings.ca.gov/product