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AN #137 - I2C LCD and Keyboard library
This AN is written by Roland van Leusden
This is a small project easy to make on a rainy Sunday. It is using the Atmel AT90S2313 uC , with a 4Mhz X-tal and 2 x 22pF capacitor. Every I/O pin has a led connected with 150 Ohm resistor in series to Vcc the Powersupply
Decoupling is done with a 100nF & 10uF (tantaal) capacitor
Reset is connected with a 47K resistor to Vcc
The PCB is shown 200% enlarged. PCB in Traxmaker format here
Only 47% of the available 2Kb is used, so there is enough room for adding more effects.