Category Archives: buck converter

Circuit VR: An (Almost) Practical Buck Converter

In the last installment of Circuit VR, we walked around a simplified buck converter. The main simplification was using a constant PWM signal. The result is that the output voltage is a fixed fraction of the input voltage. For a regulator, the pulse width will need to depend on the output voltage so that any changes in the output are self-correcting. So this time, we’ll make a regulator, although we’ll still use a few Spice elements you’d have to replace in a practical design. In particular, we’ll assume you can generate a triangle wave, which is easy enough, and produce …read more

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Posted in buck converter, Hackaday Columns, LTSpice, pwm, simulation, Skills, smps, switching power supply | Leave a comment

Open Hardware Takes Charge in Papua New Guinea

You probably don’t think much about charging your phone. Just find an outlet, plug it in, and wait a while. Can’t find a cable or wall wart? A rainbow of cheap, candy-colored options awaits you down at the brightly-lit corner drugstore.

This scenario couldn’t be further from reality in third world countries like Papua New Guinea, where people living in remote jungles have cell phone coverage, but have to charge their phones by hooking them up directly to cheap solar panels and old car batteries.

[Marius Taciuc] wants to change all of that. At the suggestion of his friend [Brian], …read more

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Posted in 2018 Hackaday Prize, buck converter, Cellphone Hacks, clean power, papua new guinea, solar charger, solar hacks, The Hackaday Prize | Leave a comment