author
3CommentsGeorgia, USAJoined January 7th, 2008

Tell us about yourself!

Complete Your Profile
  • papaof2 commented on Proto G's instructable 1000W Portable Induction Heater4 months ago
    1000W Portable Induction Heater

    Bad design. The heatsink on the ZVS driver needs air flow to cool it - that's why it has fins. This design may work in the short term but it WILL overheat and either shutdown (if the driver has overheat protection) or die (without overheat protection). You can have electrical isolation and cooling by drilling holes in the case (or cutting one large hole and covering it with a fan grille) to allow airflow and adding a fan to keep the air moving. Size (diameter) and capacity (CFM) of the fan depend on the the power level and how long the inductive heater is used at a given power level. At a minimum, the holes for airflow need to match the physical size of the heatsink and the hole for the fan needs to match the fan's diameter. The airflow needs to be over and parallel to the fins of...

    see more »

    Bad design. The heatsink on the ZVS driver needs air flow to cool it - that's why it has fins. This design may work in the short term but it WILL overheat and either shutdown (if the driver has overheat protection) or die (without overheat protection). You can have electrical isolation and cooling by drilling holes in the case (or cutting one large hole and covering it with a fan grille) to allow airflow and adding a fan to keep the air moving. Size (diameter) and capacity (CFM) of the fan depend on the the power level and how long the inductive heater is used at a given power level. At a minimum, the holes for airflow need to match the physical size of the heatsink and the hole for the fan needs to match the fan's diameter. The airflow needs to be over and parallel to the fins of the heat sink.

    View Instructable »
  • papaof2 commented on randofo's instructable Component Creatures11 months ago
    Component Creatures

    I made those more than 30 years ago, but the chips were active and the LEDs flashed. Use an LM3909 flasher chip and the life of a battery approaches its shelf life.

    View Instructable »