Content for AT89C51


The AT89C51 is a low-power, high-performance CMOS 8-bit microcomputer with 4K bytes of Flash programmable and erasable read only memory (PEROM). The device is manufactured using Atmel’s high-density nonvolatile memory technology and is compatible with the industry-standard MCS-51 instruction set and pinout. The on-chip Flash allows the program memory to be reprogrammed in-system or by a conventional nonvolatile memory programmer. By combining a versatile 8-bit CPU with Flash on a monolithic chip, the Atmel AT89C51 is a powerful microcomputer which provides a highly-flexible and cost-effective solution to many embedded control applications.

DIY Cheapest Bluetooth Controlled Home Automation

“The basic is very simple… You need a bluetooth enable host device i.e. mobile,computer or anything!! For the sending of command to the circuit. We have used a bluetooth module(HC-05 “HANDS & LEGS OF THE CIRCUIT” ) for …

Electricity meter reading via SMS

“Usually in india a person has to go and check the meter reading after every three months and it is quite a hectic and long process. As receiving the electricity meter reading is quite a complex work in India because …

Keypad and SMS Based Dual Door Lock System

“Dual password lock system is designed to open lock via Keypad when available at home and via SMS when away from home in case the guest arises. The SMS feature also provide the availability to change password.”