I calculated differently in my previous post: http://www.8052.com/forum/read.phtml?id=63809


You have 2X8 led's and 1*8 relays. That's a total of 3*8 outputs. You could consider using a latch for all your outputs. That way you'd use a single 8bit port for loading the latches, and 2 pins for addressing the latch and another one for actually latching the data.

That's 11 pins for your outputs

7 pins for your LCD.(I fail to see why your Backlight pin should be connected to your 8051..)

14 pins for adc

2 pins for serial communication

3 digital inputs

grand total: 37 pins.

I think you could even do with less, if you try and do some clever combination of various signals:

LCD enable pin could be combined with e.g. latch-enable for your output latches...

Other combinations are likely possible, thus saving even more pins.

regards
Patrick