This article features a low parts count ACDC 5 Watts Charger Design with an output voltage of 5V and a maximum charge current of 1A. This is applicable for cell phones, tablets and other devices and gadgets that use 5 volt supply. This is a constant voltage constant current charger. A constant voltage means a steady level of the output
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Electrostatic discharge or simply ESD is a universal problem in electronic circuits. Capacitor as ESD protection is providing economical solution to the problem. I used to work in automotive electronics and we used high frequency capacitors to protect the exposed pins of our product. Exposed pins are the one accessible to users. There are several ways to protect
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Switching power supply operation is very different to that of linear power supply. Despite of its complexity, higher bill of material cost and higher parts count, switch mode power supply is still the preferred power supply topology in the market nowadays. The main reason is higher efficiency and higher power density. Higher efficiency simply means that only a small portion
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Electricity saving box or energy saving box or a.k.a power saver is a real scam. Many people became victim of this product. Advertisement said a 30-60% decrease in electric bill every month with matching demonstration that the current is actually become lesser when the electricity saving box is plugged in. Ordinary people (with no background in electrical or electronics engineering
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