RedCarzRFaster
New Member
Is a resistor a good way to lower voltage? It is to limit the voltage coming off a 0-5v car sensor and my current design is a stamp, digital potentiometer, and a to d converter to sense voltage, the stamp raises resistance as voltage raises past the "clamp" mark and then lowers resistance if voltage drops.
So if the clamped voltage was set to 4.3v...
Actual Voltage / To Computer
0v...............0v
.5v..............0.5v
1v...............1v
1.5v.............1.5v
2v...............2v
....................
4.1v.............4.1v
4.2v.............4.2v
4.3v.............4.3v
4.4v.............4.3v
4.5v.............4.3v
4.6v.............4.3v
....................
5.0v.............4.3v
The problem is my digital pot hasn't arrived yet but I am wondering if this is the correct way to go about it.
So if the clamped voltage was set to 4.3v...
Actual Voltage / To Computer
0v...............0v
.5v..............0.5v
1v...............1v
1.5v.............1.5v
2v...............2v
....................
4.1v.............4.1v
4.2v.............4.2v
4.3v.............4.3v
4.4v.............4.3v
4.5v.............4.3v
4.6v.............4.3v
....................
5.0v.............4.3v
The problem is my digital pot hasn't arrived yet but I am wondering if this is the correct way to go about it.
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