pcf8575-test Small tests with Rpi like hardware, i2c bus, pcf 8575 and leds... Just to make leds blinking for hardware and sofware tryouts.... hardware orangepi one plus / raspberrypi pcf8575 (i2c port extender 16 ports) resistors : 1k, 100k, ... 2n2907 leds releases v1.0 : https://github.com/eanceleur/pcf8575-test/wiki/Release-v1.0 v1.1 : https://github.com/eanceleur/pcf8575-test/wiki/Release-v1.1 v2.0 : https://github.com/eanceleur/pcf8575-test/wiki/Release-v2.0 v3.0 : https://github.com/eanceleur/pcf8575-test/wiki/Release-v3.0 useful links http://www.orangepi.org/OrangePiOneplus/ https://pinout.xyz/pinout/i2c# http://www.ti.com/lit/ds/symlink/pcf8575.pdf https://www.fairchildsemi.com/datasheets/MM/MMBT2907A.pdf