Friday, August 14, 2009


Simple PWM Output Design - Spoondriver

This is how I've managed to build one channel of a budget PWM driver without using a circuit board or solder. Yes, the essential driver components minus blinking lights fit comfortably on a piece of 5 module long small terminal strip. In this photo the spoondriver is connected to a thick pair of power leads, a thin pair of drive leads which in this case power a fan, and a yellow lead which goes off to an Arduino output or similar.

The spoon? Oh, if you're driving a device that consumes an amp or four, you'll need a heatsink. I always hated those cheap, shoddy spoons and raided the cutlery drawer. There's one spoon that won't get stuck in my drawer again.

Vik :v)

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It looks like you've essentially created 1/3 of the PWM Driver v1.1 circuit , minus solder and superflous components like the indicator LEDs, decoupling capacitors, and PCB. :-)
Exactly! A two-channel driver will fit on a 9-unit length of terminal strip, but I'll have to use 14 units to make the deluxe knife, fork & spoon version :)

Vik :v)
I'll never look at the contents of the cutlery drawer in the same way again. <|;)
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