Content for PCF8574

Extending GPIOs of ESP8266-01 and IoT || Exploring ESP8266:Part 3

“Hello all! This instructable happens to be part 3 of my ESP series where I continue to experiment and explore the various features of the ESP 8266-01 board. In the first and second part of the series I have mentioned …

LED Chaser Circuits Using IC4017 and Arduino

“A Chaser Circuit consists of a clocked IC or other electronic unit like an Arduino that drives an array of LEDs in such a way that individual LEDs (or small groups of LEDs) turn on and off in a predetermined …

Project  ATAPIDUINO

ATAPIDUINO

“This project makes the Arduino work as a simple ATAPI controller for a CD-ROM drive. It implements the following functions: PLAY, PAUSE, RESUME, NEXT, PREV and EJECT/LOAD. It has no own display -yet- but when connected to a …

ATtiny85 Mario Challenge!

“The ATtiny85 microcontroller is a capable but compact AVR. However with only 8K of program memory, 512 bytes of EEPROM, 512 of SRAM and only 8 pins (3 of which are dedicated to the usual suspects of Vcc, GND and …

Automated Plant Pot - Little Garden

“Looking around for idea’s, I decided to make something usefull for my mother who loves growing plants and began working on an automated plant pot. The main tasks for this automated plant pot, Little Garden, are to: Measure the …

Contactless Water Fountain

“I was looking for a project that would check all the requirements set by my teachers and at the same time be fun for me to make. When looking for a subject I couldn’t help but feel inspired by …

Electromagnetic Lock With Air Monitoring

“I’ve had this issue for a while where people seemingly don’t value my privacy as much as i do myself and just barge into my room whenever they feel like it without any warning. So since i had …

Versatile I/O Extender PCB to Control Many Nixie Tubes With I2C

“Currently there is a lot of interest in bringing vintage nixie tubes to life. Lot’s of nixie tube clock kits are available on the market. There appeared to be even a lively trade on old stock of russian nixie …

Modern and New and Easier Example of Locker With Arduino Matrix Keypad 4x4

“Another example of using a LCD keypad matrix 4x4 with an I2C circuit. This matrix keypad is made of 16 push buttons and with I2c communication, you just need 2 pins to manage it: SDA (A4 on arduino board) and …

Brick a Bottle or Three

“A little game to show how a PCF8574 can be used with a Nokia 5110 screen.”