Circuit for traffic control system

This is the circuit designed as a hobby project. Here, an automated traffic control system has been prepared. This circuit uses the Atmel IC 2051 i.e. AT89C2051 an 8-bit microcontroller IC.AT89C2051 is a low voltage, high performance CMOS 8-bit microcomputer with 2K bytes of flash programmable and erasable read-only memory (PEROM).It has operating range from 2.7V to 6V. AT89C2051 is also equipped within by a 128x8-bit internal RAM and two 16-bit counters. Also, to provide a 5V supply from the ac power supply a rectifier circuit has been implemented before the positive voltage regulator LM7805.

Circuit for automatic room light controller

The above designed circuit represents an automatic room light controller. Here Infrared (IR) sensors has been used to sense and provide an input to trigger the 555 timer. This circuit uses the Atmel IC 8052 i.e. AT89S52 an 8-bit microcontroller IC.AT89S52 is a low voltage, high performance CMOS 8-bit microcontroller with 8K bytes of In-System programmable (ISP) flash memory and a three level program memory lock. It has operating range from 4.0V to 5.5V. AT89S52 is also equipped within by a 256X8-bit internal RAM and three 16-bit counters. Also, general purpose switching and amplification transistors BC547 and medium power transistors suitable for a wide range of medium voltage and current amplifier applications have been used in the circuit.

Circuit for fingerprint security system

This is the circuit designed as a hobby project. Here, a fingerprint module has been automated to create an automated fingerprint security system. This circuit uses the Atmel IC 2051 i.e. AT89C2051 an 8-bit microcontroller IC.AT89C2051 is a low voltage, high performance CMOS 8-bit microcomputer with 2K bytes of flash programmable and erasable read-only memory (PEROM).It has operating range from 2.7V to 6V. AT89C2051 is also equipped within by a 128x8-bit internal RAM and two 16-bit counters. Also, general purpose switching and amplification transistors BC547 have been used in the circuit.