Port Expander for the uBITx

Mike, WA6ISP has a small PCB that will add 16 more I/O Lines.  It runs on the I2C lines, along with 5V and earth.    It is 1.750″ x 1.100″  and has 3 address lines, so you can run a several of them and they won’t interfere with the SI5351 (which also uses i2C lines).  The chip uses the Adafruit Library for Microchip I2C Expander.  Mike has a few built up versions and a few bare PCBs.  Email him if interested using his BITX20 list email address.


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