IR Digital Thermostat for FAN

Introduction  This circuit measures temperature in Celsius scale and displays it on an alphanumeric LCD screen When temperature rise to 40 C an alarm is activated and at the same time a relay is also activated which drives a fan to keep the temperature at a level. Another feature of this circuit is that you can use the keys "1,2,3,4" of a Philips TV IR remote to turn on or off three relays, The key '4' is u ...

Read more

PIC 16F88 Digital Thermometer Light Meter and resistance ohm meter.

PIC 16F88 Digital Thermometer Light Meter and resistance ohm meter. My original idea for this project was simply to try and interface the WINTEK WD-C2401P lcd panel to the pic (see my previous post). I figured it would be fun to add a couple of ADC readings to display something useful on the lcd.  Theory of Operation: PORTB on the PIC is used as the data port for the LCD. The Enable, Register Select and Res ...

Read more

Analog to digital 8 bits For CSS Compiler

  #include <16F877.h> #device adc=8 #FUSES NOWDT ,XT #use delay(clock=4000000) #include <Lcd_4bit.c> int8 value; void main() { setup_adc_ports(AN0_AN1_AN3); setup_adc(ADC_CLOCK_DIV_2); setup_psp(PSP_DISABLED); setup_spi(SPI_SS_DISABLED); setup_timer_0(RTCC_INTERNAL|RTCC_DIV_1); setup_timer_1(T1_DISABLED); setup_timer_2(T2_DISABLED,0,1); set_adc_channel(0); set_tris_d(0x00); set_tris_A(0xff) ...

Read more

How to make a contact-less digital tachometer using IR-light reflection technique

Tachometer is a device that measures the rotational speed of any shaft or disc. The unit of the measurement is usually revolutions per minute or RPM. The traditional method of measuring RPM of a rotating shaft was based on velocity feedback concept where a dc generator is hooked to the rotating shaft so that the voltage induced across the generator’s terminals is proportional to the speed of the shaft. Toda ...

Read more

Digital clock ds1307 using PIC microcontroller

igital clock using ds1307 and pic16f877a microcontroller is designed in this project. Digital clock using ds1307 displays time and date on LCD. PIC16F877A microcontroller is used to design digital clock. I2C communication protocol is used to read time and date from digital clock ds1307. PIC16F877A microcontroller is interfaced with LCD to display time and date. Digital clock ds107 use I2C serial communicati ...

Read more

Simple Digital Current Meter (DCM) using PIC microcontroller (Schematic + code + Proteus simulation)

This post would provide a working example of how to make a simple Current Meter (DCM) using 16bit PIC microcontroller and a series shunt resistance. We have very precise ammeter current measurement with a 10bit ADC and with a tolerance of ±10mA. You may download code and Proteus Simulation from the download section at the bottom of this post. I am using MPLAB X IDE, C30 Compiler and Proteus Simulation on v8 ...

Read more

High-Accuracy Digital Temperature Sensor STS3x

The STS3x is Sensirion’s newest high-accuracy digital temperature sensor series. The STS3x temperature sensor utilizes the industry-proven CMOSens® technology and wins over users with its increased intelligence, reliability, and improved accuracy specifications. The functionality of Sensirion’s new STS3x temperature sensor includes enhanced signal processing, two distinctive and user-selectable I2C addresse ...

Read more

Digital watt meter using pic microcontroller

In this article, I will discuss how to design digital ac watt meter using pic microcontroller. Lets start with basic introduction of watt meter. What is Watt meter? Watt meter is electrical device which is used to measure real power in AC circuits and total power in DC circuits. You may have used watt meter in electrical labs. Watt meter most frequently used in electrical labs for performing various lab tas ...

Read more

Digital & Binary clock with thermometer & hygrometer

Here we have a clock. It’s not “another clock”. It has digital and binary output. It also has a thermometer and a hygrometer. It’s not “another thermo-hygrometer”. It display’s absolutely humidity (gr/m3) also. Schematic   MCU I build it around Microchip PIC16F917, with internal Oscillator at 4MHz. I also build a serial port programmer, so I can programming it on-line, using the DL4YHF WinPic. Clock I ...

Read more

PIC-based Digital Voltmeter (DVM)

Introduction This project will describe how to make a simple digital voltmeter (DVM) using a PIC16F688 microcontroller. The range of this DVM is 0-20V, but you can easily increase or decrease the range of input voltage as your requirements after you understand the voltage scaling method described in this project. The PIC micro reads the input voltage through one of the 8 analog channels and convert it to a ...

Read more
Scroll to top