.LOG Fuel Injection Board Version 2.10 - 6:05 PM 5/25/2007 Version 1.00 - 9:50 AM 5/25/2007 Note: The connectors are not numbered so I'm not sure whether to number them from right to left or left to right. Components: IC1 - SX28 (MCU) IC2 - PCF8591 (I2C A/D. 5V) IC3 - PCF8591 (I2C A/D, 2.5V) IC4 - MOSFET MIC4422 IC5 - MOSFET MIC4422 IC6 - MOSFET MIC4422 IC7 - MOSFET MIC4422 IC8 - 24C32 I2C 4K EEPROM, Clock - Transko SXO-550-H-100-ET http://www.transko.com/catalog_pdf/catalog_pdf_7-10-05/oscillators/pdf/sxo.pdf Q1 - KA317 (Adjustable Voltage Regulator) Q2 - 7805 or LM2940 (5V Voltage Regulator) Q3 - Transistor, 2N3906 - to power RS232 connector *** A1015 for powering the serial output D1 - Diode 1N4001 R1 - 4.7K pull-up resistor for I2C network SDA (SX28, RC.6) R2 - 4.7K pull-up resistor for I2C network SCL (SX28, RC.7) R4 - 1K, used with R22 for pullup and to drop voltage to 2.5 volts for refernce R5 - 33K, used to lower serial input power from computer R6 - 8.2k used to adjust voltage on Q1 R7 - 1.5k used to adjust voltage on Q1 R9 - 10K, pull-up for SX28 MCLR R10 - 6.6K, pull-up for Hall sensor input R11 - 6.6K, pull-up for Hall sensor input R22 - 1K used with R4, pull-up for IC3,pin13 C1 - 4.7uf - voltage regulation C2 - 33uf - voltage regulation C3 - 1000uf - voltage regulation C4 - .22uf - stabalize SX28 input power RB1 - Connector to SX28 Port B pins AN1 - Connector for analog inputs SIL3 - Connector (presumably power in) SIL4 - connector (A OUT) power to injectors and ignition PW1 - selects power for all the sensors on the engine, some run at 5 volts others at 12 volts JP1 - selects inputs for one input or to run separately JP2 - selects inputs for one input or to run separately SR8 - connector to desktop RS232, pin 1 to RS232, pin 2 (input) pin 2 to RS232, pin 5 (ground) pin 3 to RS232, pin 3 (output) SL1 - connector to Hall Effect Sensor SL2 - test point. 6:16 PM 5/25/2007