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Velleman K8004 DC to Pulse Width Modulator Kit

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Brand: Velleman  MPN: K8004  EAN-13: 5410329080044
  • Country of Origin: Belgium
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The Velleman DC to pulse width modulator is ideal for the accurate control of DC motors, lighting levels, small heaters as well as other applications.

  • Converts a DC voltage into a series of pulses
  • Directly proportional to the value of the DC voltage at the input
  • Almost no power is lost in the control circuit
  • DC to pulse width modulator circuit is protected against overload and short circuit faults
  • Easy to assemble
  • Supplied complete step by step assembly instructions
  • Rated skill level 3 (on a scale from 1 to 5) by Velleman
  • Intermediate assembly and soldering skills required
  • Dimensions 85 (L) x 48 (W) x 45 (D) mm
  • Velleman K8004

Please note: This is a self-assembly kit and requires soldering.

Ready Assembled? No
Type Electronics experiments


*Question functionality currently disabled

15 March 2012 Question by: Rapid Customer | Product code: 70-4076
Q. can i control more than 1 servo with this unit
A. Hi Bill, thanks for your question. In theory it may be possible to control more than 1 servo if they are connected in parallel and are similar units – but they will but work at the same rate and share the current between them so its effectiveness is divided by the number of servos attached – it would also be easy to overload the circuit. We hope this helps.

11 December 2011 Question by: Rapid Customer | Product code: 70-4076
Q. When I used this to power a HV Spark Coil from RMCybernetics, the power was so low, it only just drove the coil. Is there any chance I can configure this pulse width modulator so I can make the sparks a lot bigger? I have to scrape it along the wire at the moment in order to get a small spark. I can't afford to buy another board.
A. Hi Owen Thanks for your question. The unit will only vary the pulse rate of the input voltage, ie change the time between On and OFF – it will not amplify it. If you need any further help please feel free to contact our technical department


Reviewed by: John Bunt - 16 April 2008
Its a nice little kit, works extremely well, adjustable PWM frequency, cut in and cut out via the small pots mounted on the PCB, and overall control via the main pot. Perhaps 15 minutes tops to assemble, runs nice and cool, basically does exactly what it says on the tin. I've bought two so far and used them from everything from DC motor speed control to dimming etc.