Allows direct connection with HD44780 LCD displays, fixed or variable contrast. Several power suply options including 5 V and 3V3 standard regulators, or low power types like MCP1703 / ME6203, or none soldering a 0R resistor. 3 pushbutton footprints, 3 connectors for analog or digital sensors with power supply pins, and filter/pull-up footprints, and all those things that I've always missed for making rapid prototypes.

Version for DIP-28 and SOIC-28. Can be used with 16F876, 16F886, 16F1938, 18F25K22 and many others.

PCBs have some minor mistakes in silkscreen, but I'm happy with the results.

This PCBs are not intented to be pin-to-pin compatible with Arduino shields, although they can be used with cables.