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LDR based Relay Switch

This circuit removes the connection with the switch we are connected with. Let us take an example as bathroom switch; there is more chances to get shock while it is having water content. This situation can be overcome by using this simple circuit.

https://hexcodeplus.com/Circuits/LDRSwitchRelay.html

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12v to 220v inverter

Inverters are made for producing high voltage from low voltage DC sources/batteries. We are here to design an inverter circuit for converting 12V DC source into 220V AC power. 

https://hexcodeplus.com/Circuits/12Vto220Vinverter.html

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Future in Robotics

https://hexcodeplus.com/blog/Future%20in%20Robotics.html

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Artificial Intelligence

Artificial intelligence (AI) is an area of computer science that gives importance to the creation of intelligent machines that work and reacts like humans. AI is the simulation of human intelligence processes by machines, using computer systems. These processes include the acquisition of information and rules for using the information, reasoning and self-correction. Some of the applications of AI include expert systems, speech recognition and machine vision.

https://hexcodeplus.com/blog/artificial_intelligence.html

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12V battery level indicator

LM3914 IC is the IC used in this circuit. This IC is also called as dot display driver or bar display driver. It has the ability to sense the magnitude of input analogue signals and able to drives up to 10 LEDs at a time. 

https://hexcodeplus.com/Circuits/12VbatteryLevel.html

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Mosquito repellent circuit Using 555 IC and piezo-electric buzzer, we can simply make this circuit. KHz range pulses were produces using this circuit. And is reproduced as sound signals by the piezo-electric buzzer. Human’s can’t hear this frequency of sound, but it irritates mosquitoes, and it keeps mosquito away.

http://www.hexcodeplus.com/Circuits/Mosquitorepellentcircuit.html