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L12, DS1267 Dual Digital Potentiometer |
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Pin # |
Pin Description |
Circuit Configuration |
IDM Function |
|
1 |
VB |
Common GND |
DIG-POT Substrate GND Ref |
|
2 |
NC |
NC |
Not Used |
|
3 |
H1 |
Common GND |
Hard-wired to GND |
|
4 |
L1 |
Supplied from (L14-P14) |
Adjustable gain |
|
5 |
W1 |
Returned to (L14-P13) |
Signal Feedback (adj gain) |
|
6 |
/RST |
Driven by (L8-P25) |
Potentiometer hardware-reset |
|
7 |
CLK |
Driven by (L8-P24) |
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|
8 |
GND |
Common GND |
Power Supply GND |
|
9 |
DQ |
Driven by (L8-P23) |
|
|
10 |
COUT |
Driven by (L8-P22) |
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|
11 |
L0 |
Common GND |
Hard-wired to GND |
|
12 |
H0 |
Supplied from (L16-P6,8) |
2.5 Volt Reference |
|
13 |
W0 |
Supplies (L14-P5) |
Adj bias voltage out (0-2.5 volts) |
|
14 |
SOUT |
NC |
Not Used |
|
15 |
NC |
NC |
Not Used |
|
16 |
VCC |
Power 5VDC |
5VDC Power Supply |
This is a section of the IDM worth a second look. The controller can adjust the amount of current delivered to the injectors. Consider locations 14 and 16 as well as they all combine to form the control which has a lot of potential for tweaking.There are quite a few methods in which we can trick the IDM into either adding or subtracting current from the injectors. This goes hand to hand with the resistor mod to increase voltage. And the same holds true for this mod, a simple resistor can be changed. This one has worked its way up on my personal “To do” list. If you have the capabilities check this out for yourself. Though my documents are pretty sketchy and leave a lot to be desired you should be able to use my work as a frame work to save a hell of a lot of time.