Don Lancaster's "Low Cost Keyboard" PCB | Modern

Make your own "low cost keyboard" designed by Don Lancaster. The keyboard was featured in the February 1973 issue of Radio Electronics.
 
This board is for the modern representation of the PCB which assumes that the key switches are modern replacements (i.e. Cherry MX switches). The original version is also available.
 
The ASCII encoder, designed by Don Lancaster, connects to this keyboard.