Projects

Digital Temperature Sensor Circuit

Digital Temperature Sensor Circuit

Temperature sensors are widely used in electronic equipments to display the temperature. You can see the digital clock displaying the room temperature value. It is due to the temperature sensor embedded in it. Generally, temperature value is analog. It is converted to digital value and then it is displayed. This article describes the same converting […]

Interfacing 7 Segment Display With PIC Microcontroller MikroC

Interfacing 7-Segment Display With PIC Microcontroller – MikroC

The 7-segment display is the earliest type of an electronic display that uses 7 LEDs bars arranged in a way that can be used show the numbers 0 – 9. (actually 8 segments if you count the decimal point, but the generic name adopted is 7-segment display.) These devices are commonly used in digital clocks, […]

air sampler

Air Sampler using PIC16F690 microcontroller

Do you ever wonder what is in the air you breathe? Or maybe you have hay fever and want to know what kind of pollen makes you sneeze in spring? Questions like that prompted me to build a simple device for capturing airborne particles so they can later be examined under a microscope. Before you […]

Breadboard

Breadboard module for 18-pin PIC16F microcontrollers (PCB version)

Because of their compact size, ease of use and many built-in peripherals, the 18-pin PIC16F series processors (PIC16F628A, PIC16F88, and now PIC16F1827/47) have always been my favorite microcontrollers. Many of my projects and tutorials written in this blog also use PIC16F628A and PIC16F1827 microcontrollers. As I will be using them more in the future too, […]

Password Based Door Lock System using 8051 Microcontroller schematic

Password Based Door Lock System using 8051 Microcontroller

Traditional lock systems using mechanical lock and key mechanism are being replaced by new advanced techniques of locking system. These techniques are an integration of mechanical and electronic devices and highly intelligent. One of the prominent features of these innovative lock systems is their simplicity and high efficiency. Β Such an automatic lock system consists of […]

mp3 player

Echo MP3 player using PIC18LF452

The EchoMp3 is a small DIY* MP3 player. It’s cheap and of excellent quality. 64, 128, 256, 512MB and 1, 2, 4 GB MMC and SD(HC) cards used as storage. FAT (FAT16) and FAT32 supported. Low power operation with a single AAA (HR03) 1V2 Ni-Mh battery. Runs on a 18LF452 or 18LF458 at 20 MhZ. […]

Breathalyzer circuit using 8051 schematic

Breathalyzer circuit using 8051

Last Updated on March 12, 2014 by admin in 8051 projects with 15 Comments   Alcohol Breathalyzer circuit using 8051 microcontroller (AT89S51). This article is about a breathalyzer circuit using 8051 microcontroller which outputs the blood alcohol content (BAC) from the breath. The BAC is displayed in percentage on a 3 digit seven segment display. […]

Tiny AVR Microcontroller Runs on a Fruit Battery

Tiny AVR Microcontroller Runs on a Fruit Battery

Some of the fruit and vegetables we eat can be used to make electricity. The electrolytes in many fruit and vegetables, together with electrodes made of various metals can be used to make primary cells. One of the most easily available vegetable, the ubiquitous lemon can be used to make a fruit cell together with […]

30 volts Panel Volt Meter Using PIC MCU

30 volts Panel Volt Meter Using PIC MCU

This is a simple application of internal 10-bit ADC(analogΒ to digital Β converter) of PIC16F676 microcontroller.you can use this Β circuit Β to measure Β up to 30 v dc. the possible Β applications are on bench top power supply or as a panel meter inΒ variousΒ system. Circuit descriptionΒ  Β  Β  Β  Β  Β  Β  MICROCHIP’S PIC16F676 is the heart and brain […]

Interfacing DC Motor with PIC Microcontroller using L293D

Interfacing DC Motor with PIC Microcontroller using L293D

DC Motor and L293D We can’t drive a DC Motor (depends) directly with a Microcontroller, as DC Motors requires high current and high voltage than a Microcontroller can handle. Microcontrollers usually operates at +5 or +3.3V supply and it I/O pin can provide only up to 25mA current. Commonly used DC Motors requires 12V supply […]