Content for PCF8574

PCF8574

This 8-bit input/output (I/O) expander for the two-line bidirectional bus (I2C) is designed for 2.5-V to 6-V VCC operation. The PCF8574 device provides general-purpose remote I/O expansion for most microcontroller families by way of the I2C interface (serial clock (SCL), serial data (SDA)). The device features an 8-bit quasi-bidirectional I/O port (P0–P7), including latched outputs with high-current drive capability for directly driving LEDs. Each quasi-bidirectional I/O can be used as an input or output without the use of a data-direction control signal. At power on, the I/Os are high. In this mode, only a current source to VCC is active.

Absolute Position Encoder With Single Track Gray Code

“I made a rotary encoder. Due to its 60 steps (6 degree) resolution it suits to make clocks. There is a very good and detailed description of the single track Gray code here: https://www.ncbi.nlm.nih.gov/pmc …

Book Conservation Chamber Using Raspberry Pi

“Hello everyone! For a school project at MCT Howest Kortrijk, I made a Book Conservation Chamber. This is a climate controlled box in which you can store books. The reason why I choose to make this is because a lot …

Making a Prototype With Arduino (TIM-01 EYES)

“I have been designing and building a robot. It got to the stage where it was time to do a head for it, but before I did the head I needed to design some Eyes for it using the Nokia …

Connect LCDs With NodeMCU and Arduino

“Most of our Arduino projects require a way to present us with information about their state, and very often an LED can be enough to indicate if a condition is true or false. But, it is not uncommon that we …

Project  Z80-mbc3

Z80-mbc3

“A 2021 revision of the original MBC design by Fabio Defabis with disk emulation on microSD. Runs CP/M + applications with a VT100 terminal. The Z80-MBC3 is a single board computer available as a kit. It can be assembled …

ESP8266 DCC Controller

“This is a DCC model railroad controller based on the nodeMCU ESP8266 IOT module. It makes use of other modules commonly available on eBay for the Arduino such as a 1602 LCD display, keypad, jogwheel and I2C backpacks. The controller …

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 …