This is a iBUTTON based secured system that uses a microcontroller. Whenever someone touches the iBUTTON using his own iBUTTON, the firmware inside AVR reads its unique ID and relay operates which in turn opens up the door.
This is a circuit for a pulse counter that uses a pulse source and a microcontroller-based counter that displays the accumulated count on a LCD module.
The circuit that uses microcontroller AT89C51 can control four devices from a distance of upto 30 metres wirelessly. An LCD module is used to show the device number and preset control time at the transmitter module.
This is a circuit for a remote controlled 6 camera CCTV switcher that uses microcontroller, infrared module and other components to control the operation of 6 CCTV cameras. Controlling messages can be seen on a LCD module.
This circuit lets you operate your home appliances such as lights and water pump from your office or any remote location. The system also gives you voice acknowledgement of the appliance's status. It comprises microcontroller AT89C51, DTMF decoder MT8870, voice recording/ playback device APR9600.
This is a circuit that uses IC NE555, five decade counters along with a 7-segment driver IC to form a 5 digit decimal counter. The output of the decimal counter is used to drive the numerical display of frequency counter.
This is a circuit for a solid state voltage stabiliser that gives indication of low/ high voltage and gives a stabilised output of 220V. Its works anywhere in the range from 120 V to 280 V.
Post Comment
