new circuit board

BLM is still in the midst of designing his schematic for the remote controller hub. He like you to know it aint easy. Unlike the previous boards he designed, this time he has to squeeze more stuffs and multiplex them for the microchip.

Here is his problem, the microchip has only 5 input/output ports. Of which a total of 33 pins are available. Plenty right??? NoNo you are so wrong.

RF chip-4 pins
keypad-8 pins
LCD-10 pins
buzzer-1 pin
parrallel port connection-16 pins

a grand total of 39 pins. Where to get the additional 6 pins you might wonder. Well leave it up to BLM to figure that since at no one time you need to activate more than 1-2 of this devices, you can multiplex it (stack it together). And since the microP is clocking at 20MHz. It all can be done with much sluggish delay.

BLM work real hard this morning and finally complete finished his schematic drawing before 2pm. He like you to know that he has leftover 6 pins with nothing to connect with.

Then comes the rigously task of routing this piece of work. Placement is the most important part. It is like art. The components must be placed in a certain way to look beautiful. It cant be done otherwise. (though eventually this board will be enclosed in a box and no one can see) The routing is left up to the computer while BLM left for classes. It took like 30 mins before completion and leaving 24 connections still unconnected. So I guess BLM will have to physically finished them