#27 H2O2 - PWM Case V2 Layout Part 5 of 17

In this episode MosFet Electro Static Discharge (ESD) Handling, Bending MosFet Pins, Building the Heat Sink System. Applying Heat Sink Compound.
This is My Concept of what a PWM case should look like. Minimal cooling, no fan! Why, Because The Four MosFets are not driven hard. No moving parts to fail. Automatic Current Control! Why, Because without it any HHO cell will heat up and reach thermal runaway: Current increase and the cell gets hotter this continues until the cell melts or the current source fails or the fuse blows. A Function to monitor Peek Current! Why, because the System will fail if the peek current is to high. Knowing peek current means you are in control of your Cell and its Electrolyte.

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Mosfet Configuration: http://www.h2o2fromh2o.oregonsouth.com/images/PWM-CASE/H2O2-InfoDoc-PWM-MosFe...

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[hhoforvolts]

You can run into major problems depending on what Mosfet is used and the mounting kits. Some use plastic screws, others use a insulated guide for the metal screw. Both can have a failure soon after use, where the screw or guide will soften due to heat, and then there is little heat conducted to the heat sink. Make sure you use only the best mounting hardware. I have gone a different way, I float the heat sinks. Also you could use a spring device to press the Mosfet body to the heat sink.