blah blah, describe this later. messageboard link. Here's an incomplete part ordering list so far.

Parts list#

MAX233 population option#

• Parts available from Digi-key

|qty|Digi-Key #|Description|Designator(s)|Unit price |1|399-1760-1-ND|CAP TANT 220UF 6.3V 20% SMD |C1 |1.85000 |3|490-1318-1-ND|CAP CER .1UF 10V 10% X5R 0402 |C2,C3,C6 |0.05100|* |3|311-10KGCT-ND|RES 10K OHM 1/10W 5% 0603 SMD |R1-R3 |0.07000|* |1|311-100KGCT-ND|RES 100K OHM 1/10W 5% 0603 SMD |R4 |0.07000|* |1|1N4148WDICT-ND|DIODE SWITCH 75V 400MW SOD-123 |D1 |0.44000 |1|MMBT4401FSCT-ND|TRANSISTOR GP NPN AMP SOT-23 |Q1 |0.17000 |1|ED4628-ND|28 PIN W/W IC SOCKET GOLD .600 |IC1 |3.20000|??? |1|MM74HC00M-ND|IC GATE NAND QUAD 2INPUT 14-SOIC |IC2 |0.39000 |1|MAX233ACWP-ND|IC 2DVR/2RCVR RS232 5V 20-SOIC |?? |10.7600|eek ||||||>* sold in multiples of 10 - Parts available from allamerican.com

|qty|allamerican #|Description|Designator(s)|Unit price |1|U634H256SC35|256KNVSRAM,POWERSTORE,32KX8 SOP32 (300 MIL)|??|7.50 - Parts available from arrow.com

|qty|arrow #|Description|Designator(s)|Unit price |1|STK14C88-N25|256K NVSRAM, 25ns, SOIC32 300mil|??|11.56 MAX233's sure are a ripoff. the extended temp range ones are $14.63! It's probably cheaper just to use a MAX232 with the damn external caps. FTDI FT232BM USB UART Chips can be ordered from Saelig $5.75 ea, $4.25q100 - note $30 minimum order. We also need pin headers/receptacles/crimp pins for receptacles, and probably a panel-mount RS232 port for the MAX233 version and some sort of USB plug for the USB option. And maybe some Kynar wire for the necessary ECU modifications.