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.
See how to make a homemade Magic 8 ball with an Arduino, OLED display and random answers. it also has sounds with a DFplayer and mp3 from an SD card. It detect rotation with an IMU module.
I've made a LIDAR sensor based on Arduino with a 3D printed case and a infrared VL53L0X distance sensor and a Processing interface to see the results...
A 3D printed pumpkin with color adressable LEDs inside and a DF player for mp3 sounds. It also has a PIR detector so it will detect movements and then create spooky sounds. Is made with Arduino and also has a fog mist generator circuit of 1.7MHz.
This is a 7 segments display project. I say huge because is way bigger than comon 7 segment displays. Also, it is addressable so we can control a lot of themn in series using just one pin of the microcontroller and the Adafruit library.
I've used my keyboard PCB from a previous tutorial and made a simple chat between two arduinos with radio connection. A quite fun project to make and use. See more...
I've remade this project. We have 9 dot matrix modules in series. We could scroll text sent from the smartphone via Bluetooth, we can show time from a RTC and the full date. Chaenge speed and brightness. See more...
This is a very small NRF24 radio based PCB. It has 4 H bridge outputs and one MOSFET output so you could control 4 motors for a RC toy car, a drone or RC plane. See more...
I've made a new project with the colorfull WS2812 RGB LED strip. Is very easy to use. In this case I've made a huge Tetris board game with sound, score and joystick control. See more...
I've made a PCB with the full alphabet and with matrix format with serial output UART or i2c. It hass all the characters, numbers and special signs. See more...
Brushed DC motor, Optic encoder PID control of Axis
See how to control a DC BRUSHED motor with PID and move a CNC axis with Arduino and an optic encoder in quadrature. Move the motor with H-bridge circuit. See more...
Control sensors, LEDs, modules, anything connected to an Arduino from anywhere in the world using a server database and a small interface and the ESP8266 WiFi module. See more...
A better way to see how PID works. See how to control the position of a pingpong ball with this balance controlled with Arduino, PID and a servo witha distance IR sensor. See more...
In this tutorial we make a muti measurement device. It has a lot of sensor and a 3D printed case. It could measure distance, length, angles, level and RPM. See more...
I've used a precision caliper to measure the filament diameter. This caliper has an i2c serial communication so we could get the data to the Arduino using just 2 wires. See more...
We now have the radio controller made with Arduino. We have seen how to receive data and control servos. Now, with this PCB we can control DC motors as well, add sounds and more extra stuff. Also, we have bluetooth control with an Android App. See more...
