8-channel
There are 6 repositories under 8-channel topic.
RobTillaart/MCP23008
Arduino library for I2C MCP23008 8 channel port expander
SumeriLal/EagleCAD
These are EagleCAD library and datasheets.
DaveBrad/esp8266_8ch_relay_control
An ESP8266 browser/web-server project that controls an 8 channel relay board using an MCP23017 GPIO extender
johntalton/tca9548a
Texas Instruments I²C Bus Manager
andyld97/RControl
A console app which you can use to send commands/retrieve info using a Conrad 8-channel relay card.
cctweaker/ESPlights
Multi channel WiFi mains voltage controller software & hardware based on the ESP8266.