Full tutorial on how to control the Arduino UNO ports using register. Port register manipulation. Set pins as output/input DDRD, set pin to high or low PORTD, or read inputs with the PIN register.
See how to make the remote controller very low power (90uA) and last for years. Make 433Mhz radio connection. Power the receiver from 220V with very small regulator. Control a relay with a push of a button remotely.
Use a rotary encoder with the Arduino with clock and data pins and count positions. Increase or decrease the counter when we rotate the encoder. Then we see an example using interruptions so the code will work better.
A keypad is a nice simple method of accepting user input into your project. These come in a number of styles and generally there are 2 types a 3×4 keypad and a 4×4 keypad. The numbers stand for the rows and columns, so a 3×4 keypad has 3 columns and 4 rows.
See how to make a digital electronic load. Homemade DIY circuit using a power MOSFET. It can have constant load, current and power. It has a LCD and a rotary encoder for the menu. See full tutorial, part list and schematic with Arduino.
Very easy, control sounds from a SD card in an mp3 format. Play sound, stop, pause, replay, etc. All using a UART connection with the Arduino and only 2 wires and a small library.
In this tutorial I am going to talk about the HL-69 module, a soil moisture sensor that uses the conductivity between two terminals to determine certain parameters related to water, liquids and humidity.
See the schematic of this ATtiny85 based gaming console. Get the PCB files, see how to solder everything and how to upload each code to the ATtiny chip. Play!
To give more power to Arduino board DAC (Digital to Analog Converter) we have a detailed Arduino DAC Tutorial. Here DAC IC MCP4725 based breakout board is used because it is 12-Bit Digital-to-Analog Converter with EEPROM Memory, this IC utilize low power and gives high accuracy output.
After a few attempts I've made the final version of this brushed DC motors based drone. It is programed in Arduino and it uses the NRF24 radio controller from a previous tutorial. The KIT includes both the drone PCB and the radio controller.
After a few attempts I've made the final version of this brushed DC motors based drone. It is programed in Arduino and it uses the NRF24 radio controller from a previous tutorial. The KIT includes both the drone PCB and the radio controller.
We learn how a "strain gauge" works, how to pass from resistance changes to voltage values and read that with an ADC and then how to use these with a load cell and create a precision homemade scale.
We detect the door open with a hall sensor. We send the data to a database with the ESP8266. Then we send a mail to our own accoun so we could know that somebody opened the door from anywhere in the world.
Homemade display that uses Acrylic boards with engraved numbers and RGB LEDs from below in order to show all the numbers. You could connect them in series with WS2812 LED strip and create a digital clock.
Arduino based multimeter that could measure Inductance, current, capacitance, voltage and resistance. It can also detect short circuit, measure diode, frequency and more but that is for a furure update. See full schematic circuit and the PCB I've designed.
