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Video pattern generator

Video pattern generator

Velleman K8025

Velleman K8025: Video Pattern Generator Kit


The Velleman K8025 Video Pattern Generator Kit allows you tocheck the picture quality of your monitor or tv, ideal for adjustment or troubleshooting. The K8025 will generate unique black & white (monochrome) and grayscale video patterns while simultaneously emitting a fixed audio sing wave. 


Velleman VTSSC40NU

Looking for a fun project? The K8025 Pocket Video Pattern Generator Kit (and fixed audio sine wave) is a SELF-ASSEMBLY electronic kit and requires soldering  (recommend for makers and hobbyists with an intermediate soldering skill level).




  • Supply: 3V, CR2032 battery (not included)
  • Consumption: 12mA (grid signal@75ohm)
  • Audio output: 1kHz sine wave / 0.7Vrms (10k load)
  • Video output: 0.8Vpp @ 75 ohm load (staircase signal)
  • Auto power off: 10 minutes


  • Pocket video generator and fixed audio sine wave
  • Black and white + gray scale video patterns
  • Check the picture quality of your monitor or TV
  • Use for picture adjustment or troubleshooting
  • Video selections:
    • PAL or NTSC
    • Interlaced or progressive (non-interlaced)
    • 12 different patterns included: purity patterns (black, white, gray), grayscale (staircase), square grids, 100% contrast half screens
    • 4/3 and 16/9 patterns


See more fun and exciting Velleman Electronic Kits.


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