![]() Temperature Controlled DC Fan using Microcontroller: The main principle of the circuit is to switch on the fan connected to DC motor when the temperature is greater than a threshold value.This can be used in home applications and in cpu to reduce heat.Password based Circuit Breaker: This password based circuit breaker project is built using 8051 controller and is used to switch off the power supply to the line by entering a password.Bidirectional Visitor Counter using 8051: This Bidrectional Visitor Counter Circuit is helpful to count the number of persons entering or leaving a room and to display it on a screen. ![]() It helps in mobile phones tracking which are used for spying.
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