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Power Supply Repair

Low-Cost Versatile Hand Mixer

Mixing liquids using a muddler or churner is a traditional technique. However, it is time-consuming and sometimes fails to mix these properly. Here is a low-cost and versatile hand mixer circuit. It can be used for making stuff like lassi, chhach (buttermilk), butter and lemonade, among others. The author’s prototype …

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PWM-To-Analog Signal Converter

This article presents a simple circuit to convert transistor-transistor logic (TTL) or pulse width modulation (PWM) signal to analogue signal using LM358 operational amplifier. The circuit can be used as an extension shield for Arduino or microcontroller (MCU) or TTL/CMOS signal generator. PWM-based digital-to-analogue converters (DACs) are often used to …

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Electronics of Exotic Materials

As electronic devices using conventional materials reach their limits, research focus has shifted to the development of exotic materials with properties that can make electronic devices more efficient, lightweight, flexible, cost-effective and smart. Take a look at some promising candidates. Most of us assume that smartphones and laptops will keep …

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