22 lines
1,020 B
Markdown
22 lines
1,020 B
Markdown
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# Pressure coupler
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## Left side (facing front panel)
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From top to bottom:
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- input on/off -> connected to single white wire, switch is between that and ground
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- bridge balance -> connected to blue wire. This is a voltage divider between ground and VCC, read this with `analogRead()`
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- calibration -/off/+ -> connected to twisted white/orange wire, connects
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the white wire to ground, nothing to ground or the orange wire to ground
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- multichoice switch -> has 16 positions, each yellow wire is a bit of the number of the position
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so for example, if the switch is in the third position (so 2 when counting 0-based, or 0010 in binary),
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wire 2 will be connected to ground, all other wires will be left floating
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Red is connected to VCC (5V), black to ground
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## Right side
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Switches are connected to white wires (2 positions) or white and orange wires (3 positions). Knobs are connected to blue wires.
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Switches connect to ground or keep wire floating. Knobs are a voltage divider between ground (black) and VCC (red).
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