LM75A is a digital temperature sensor with built in analog to digital converter and I2C interface .It can provide an accurate temperature reading from -55 to +125 C. For similar design based on analog LM35 sensor click here. Also a ...

Measuring current is a relatively simple task that can be done by connecting a shunt resistor in series with the load and measuring the voltage on this resistor. The voltage is proportional to a load current according to Ohm’s law ...

In this post I'll show a simple running LED circuit. Currently only 2 patterns are available but additional effects can be easily added by slightly modifying the code. This design uses only 16 LED's however PIC16F877 has 5 I/O ports ...

In this post I’ll show you how to interface a RTC module DS3231 Real Time Clock  with Arduino. This particular module uses I2C protocol to transfer current time to a micro controller. DS3231 library and header files should be installed ...

All my previous project were based on PIC microcontrollers or Arduino board, however recently I’ve been experimenting with STM32 MCU. For this simple project a NUCLEO board based on STM32L011K4 MCU was used. The STM32 Nucleo-32 board provides a simple ...

Solar power mobile charger can be built by tweaking digital power supply schematic. The Software/Hardware stayed almost the same as the original circuit.Current design has the same overcurrent protection and output voltage can be changed by pressing SW1. Voltage and Current ...

This post is about building a basic distance meter with ultrasonic HC-SR04 sensor and PIC micro controller. For Arduino version click here. Raspberry Pi variant is also available at this link The interface is very simple and does not require too many commands ...

Using LM35 temperature sensor with Raspberry Pi is a relatively simple task once you have a way to read and convert analog signals. Fortunately in my previous project I’ve shown how to build a basic Raspberry Pi voltmeter with ADS1015 ...

In this article I’m going to show you how an 8x8 LED Dot Matrix Display can be driven by MAX7219 with Arduino.There are 2 similar designs. PIC16F876 version is  available at this link ,for circuit based on 74HC595 click here.For this project ...

Light emitting diode (LED) Controller was built using PIC microcontroller and LM317 regulator. Comparing to traditional light sources led illumination should provide more efficient lighting also giving you a possibility to choose desired wavelength. 48 white diffused LEDs connected in parallel ...