DollaTek5Pcs PCF8574 IO Expansion Board I/O Expander I2C-Bus Evaluation Development Module

Wie beschrieben - einwandfreie Ware

I tinkered with these for the fun of it & found them easy to use. I really liked the use of jumpers to change i2c addresses - much easier than cutting and soldering traces. Also nice that they can be easily daisy chained with their connectors.

These are very neat little boards for "breaking out" the IIC connection, commonly found on modern microcontrollers. This gives you an additional 8-bit port to use as you want. There are no contiguous 8-bit ports on the Arduino Uno or Nano, so it is handy to have a complete port for a change.The board has a 5-way pin connector at one end and a matching receptacle at the other, so boards can be "daisy chained" together for multiple ports. Links on the board set the bottom 3 bits of the IIC address so that potentially you could have 8 of these boards strung across the desk, giving 64 extra I/O pins!There is an interrupt associated with each module, which is part of the through connection.I would have given these useful little boards 5/5 if zero volts and + supply appeared on the break-out connector! Then you could connect switches, LEDs etc with no flying wires. Still very useful and excellent value - you would be hard pressed to buy the parts at this price!

Llegaron muy rápido, incluso antes de la fecha prevista. Comprobado que funcionan correctamente tras hacer un test a cada una de las piezas.

Petit module bien pratique pour apporter 8 entrées/sorties numériques supplémentaires à mes micro-contrôleurs Arduino et Raspberry en passant par le bus I2C. Très utile pour les applications robotiques et bien plus facile à mettre en oeuvre que les PCF8574 au format DIP.