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[DarkMatter]

Sorry to Mods. I posted this twice here:
http://forums.xbox-s...o...22672&st=15
But I thought it would be better to start a new thread so it can be accessed more easier. My apologies if I shouldn't have done this.

Here's a better schematic. Its a tad large, but at least its more legible.
I hope I got everything right, but I'm not 100% sure on R20, if its supposed to be 10k or 1k. Can someone validate which one it should be???
Parts list shown below schematic.



Parts List

Semiconductors:
IC1 & IC2 = LM339N Quad Low Power Comparator
IC3 = PIC16F876A PIC Microcontroller
IC4 = 74HC08 Quad 2-Input AND Gate
IC5 = MAX232 Dual RS232 Receiver/Transmitter
LED1 = 5mm Flashing LED (1Hz)

Resistors (All 0.25W):
R1 - R18 = 1k ohm
R9 = 5k6 ohm
R10 = 680R
R19 = 330R
R20 = 10k

Capacitors:
C1 & C2 = 22pF Disc Ceramic 50V
C3 - C12 = 0.1uF Monolythic 50V

Misc:
X1 = 20MHz Crystal
CN1 = 16 Way IDC Header Male
CN2 = DB9 Female Connector
SW1 = SPST Momentary Push-Button Switch
USB = USB Socket Female

Take Note:
C7, C8, C9 and C12 MUST be placed as close to Vcc and Vdd points on thier respective IC's

Regards,
DarkMatter

N.B. Please post if any of the above is incorrect. Thanx in advance.