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- auto match III spectrophotometer
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- 68000 based micro
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- two board construction
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- sensor board + main CPU board
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- sensor board has leds soldered on all edges of board
- slight nuisance to repair
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- must cut all then resolder
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- ics
- Colour Board:
- Maxim187ACWE x 2 ADC w/4.096 reference (see resources for why this is used)(SPI)
- X77K (LED drivers) x 5
- LT1152 x 2 (op amps connected between adc and)
- LT0412 x 1 (can't find data sheet on this one)
- X9241A Renesas digital Potentiometer x 1 (I2C)
- OPT301M (Burr Brown / TI).
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- VDD is 5V+ (colour board)
- There is a VREG, and some drivers that are only used for the leds, the 74 series
- logic is also for the leds
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- the FFC connector on bottom of colour board.
- Starting at pin 1, with ffc coming towards you
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- 1
- 2
- 3 GND
- 4 VDD
- 5
- 6
- 7
- 8 CS
- 9
- 10
- 11 SCLK2
- 12 SCLK1
- 13 DOUT1
- 14 DOUT2
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- CS are common to both MAX187,
- These numbers (DOUT1,2 SCLK1,2 should be double checked. I think they are wrong.)
- Note that they have ONE CS, and TWO DO. So instead of selecting chip via
- the different CS, they simply read both DO at the same time.
- I didn't know you could do this. However, it comes at the expense of separate
- SCLK lines, which they had to put on the FFC.
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- Both DOUT are held high by R next to each MAX187
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- Pinout of Colour Sensor EDIT: I found the data sheet, skip to the next pinout
- (going clockwise with notch as #1, with the pins facing towards you)
- 1 GND
- 2 5V/VDD
- 3
- 4
- 5
- 6
- 7
- 8
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- (with pins below you, top of sensor facing you)(counter clockwise, 1 is one left of notch)
- FROM DATASHEET
- 1 5V+
- 2 In -
- 3 V-
- 4 1M ohm Feedback
- 5 Output (Goes into 0 ohm resistor, then into LT1152 Op Amp on right side)
- 6 n/c
- 7 n/c
- 8 GND (notch)
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- LT1154 output to MAX187 adc.
- One (inverting?) Input is from Renesas Digital Pot.
- X9241AUS is four 50K.
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- No one is really using the X9241 online.
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- http://www.combustory.com/wiki/index.php/Temperature_Controller
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- The digital pot looks to be to tune the Feedback R of the OPT301. Pin 4. I think...
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- Could just hack a 50K resistor in there somewhere probably. It has an internal
- 1M ohm resistor...
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