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Please Keep Silence! You must have seen this message written in places like library and office. But some people intentionally or unintentionally tend to make noise in such silence zone areas, disturbing the others. How about having a device...
Android smartphones are rapidly becoming popular in the education industry. Some can even be used as signal or function generators. Bulky signal generators available in the market are costly and complex to operate. Android smartphones can be used as...
This project is used to control the movement of the spray head and nozzle in a thin metal or insulation film deposition system. Here, AT89C51 or P89V51RD2 microcontroller (MCU) is used to control the spray head and nozzle in...
This Automatic Fan Controller circuit is based on a thermistor and an operational amplifier (op-amp) that drives a MOSFET to switch a cooling fan on and off in an active heatsink system. The design also includes an overload protection...
  Here is a simple joystick to control a robot to move in forward, backward, right, left, clockwise (CW) and counter-clockwise (CCW) directions using six buttons. It is cheaper than most other joysticks available in the market. The author’s prototype...
This project is based on Android app and Arduino Uno using Bluetooth as the wireless communication medium. It is a simple and flexible home automation system with only a few electronic components, without complex soldering. This project is designed...
In this project, we are going to make a smart OTP-based locking system as you can see in (Fig. 1). This smart lock can generate a new password every time you unlock it, which further enhances your security level....
  As water consumption and wastage increases day by day, water scarcity has become a growing concern around the globe. While some irresponsible people are overusing water and wasting it daily, a large population remain deprived of safe drinking water....
The circuit presented here converts 12-bit parallel digital data to serial data and then transmits it through RF transmitter module. Serial data is received at RF receiver module in serial format. The received signal is then converted to parallel...