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I have be thinking about a pic microcontroler based voltage regulator for about 3 years now; last week i install a 2.5kva 36V inverter for a consumer of mine... 3 days later he called me that the inverter is not charging the battery well... so i ask him to call me and check the input voltage on the lcd screen when ever their is a mains supply (NEPA).... so he called  confirming that the input voltage was 108volt; we had to design a  2kva automatic voltage regulator from 80V - 260V...     ON 187 V INPUT TEST ON PROTEUS   ON 218V INPUT TEST ON PROTEUS       ON 262V INPUT TEST ON PROTEUS WITH HIGH VOLT G UIDE     RELAY CONFIGURATION   TRANSFORMER CONFIGURATION   A   B              I will upload the code and the pcb soon

Digital Thermometer 0-100.0°C is a digital thermometer that operates in modetemperature measurement in Celsius (° C). Digital Thermometer 0-100.0 ° C in this article uses data processor in the form of a microcontroller AT89C4051. Temperature sensors used in Digital Thermometer 0-100.0 ° C. This temperature sensor LM35D. Digital Thermometer 0-100.0 ° C. It uses the temperature measurement data viewer in the form of 1 line LCD viewer. Digital Thermometer 0-100.0 ° C. It can display the temperature measurement data with a resolution of 0.1 ° C. Digital Thermometer Circuit Diagram Digital Thermometer 0-100.0 ° C. These temperature sensors make use of LM35D as temperature sensing. In Digital Thermometer 0-100.0 ° C. This temperature sensor measurement data this LM35D (Level Voltage) is then converted into 4-bit binary data using the ADC CA3162. Then the 4-bit data from ADC CA3162 which is a measurement of data if the temperature is in the AT89C4951 microcontroller so that it becomes an oper...

PORT 0 : The structure of a Port-0 pin is shown in fig 6.It has 8 pins (P0.0-P0.7). Add caption Port-0 can be used as a normal bidirectional I/O port or it can be used for address/data interfacing for accessing external memory. When control is '1', the port is used for address/data interfacing. When the control is '0', the port can be used as a  bidirectional I/O port. PORT 0 as an Input Port Let us assume that control is '0'. When the port is used as an input port, '1' is written to the latch. In this situation both the output MOSFETs are 'off'. Hence the output pin have floats hence whatever data written on pin is directly read by read pin.   PORT 0 as an Output  Port Suppose we want to write 1 on pin of Port 0, a '1' written to the latch which  turns 'off' the lower FET while due to '0' control signal upper FET also turns off as shown in fig. above. Here we wants logic '1' on pin but we getting floating value s...