I'm having a thesis about Capacitive sensor and inductive sensor for detecting plastic and metal garbage wastes. The sensors have 6v to 36v input. I'm currently using 12v adapter but the range of sensor is so small. Can the range increase if I use boost converter of 36v?
Which type of capacitive sensor do you have in mind? Data sheet?
LJC18A3-H-Z/BY is the model for the capacitive sensor
Please give a link to the data sheet.
Find out yourself.
Typically in your sensor you have a conductive electrode on the surface and another reference electrode within the sensor. There is a circuit creating an oscillating electric field around the sensing electrode and when an object enters the electric field, it changes the field's characteristics, leading to a change in capacitance between the sensor's electrodes.
➜ The internal circuitry detects this change and reports the signal against a set threshold.
The model you have have electrodes/circuitry tuned for 1cm ±10% and increasing the range would mean messing around with the circuitry creating the field or detecting the change in capacitance.... which is not that easy / very specific has the product is tuned for its specification.
Most probably (lacking datasheet) both electrodes sit on top of the sensor. That arrangement determines a certain (small) range of sensitivity.
Possibly this would be indeed typical of touch sensors used in consumer electronics.
This looked more like a "pro" reference where the reference electrode is positioned in such a way that it is not directly exposed to the external environment (within the body and typically shielded).
This shielding helps maintain a stable reference capacitance, allowing the sensor to detect changes in capacitance due to nearby objects more accurately.
Not sure what model this is though, indeed the detailed technical datasheet would help.
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