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.

Interval timer

Velleman MK111: Adjustable Interval Timer Minikit

Velleman MK111

555 Timer Circuit Kit

Use this timer to control the frequency and length of electrical pulses by switching circuits on and off. You can use the Velleman MK111: Adjustable Interval Timer Minikit for the intermittent operation of blinking lights and slide projections, timing photo and video shoots, and other automated projects. You have the ability to adjust the pulse time between a half second and 5 seconds and pause time between 2.5 seconds and a minute.

Category: Daily Use

Difficulty: Intermediate

For an already constructed (non-DIY) version, view the Velleman VM136 module.


  • Output relay with dry switch-over contact: 3A/24V
  • Pulse time adjustable: between 0.5 and 5 sec.
  • Pause time adjustable: between 2.5 and 60 sec.
  • Power supply: 12V DC / 100mA
  • Board Dimensions: 1.6 x 3.4" (4 x 5.8cm)

Additional Information

Difficulty Level 1


Assembly manual

Info Sheets

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