Proton Precession Magnetometer Circuit Design
Budget: $30 – $250 CAD
Looking for an expert to design a circuit for my project, which is a Proton Precession Magnetometer.
Order flow is as follows;
-polarizing pulse which energizes the coil
-the proton precession signal is read from the coil
-flows through a pre-amp
-than through a 2500Hz sallen key low pass filter
-than through a 2100Hz sallen key high pass filter
-than back to the stm32F767 microcontroller for signal processing
entire board will eventually be attached to a drone, so will need some noise protection for the reading of coil which will be in microvolts, coil I have made which has 12.5 ohm resistance and 19 millihenry inductance
- board to be powered by a 4s lipo battery
- will also need onboard memory(sd card) to store values from the signal processing
- will also need a gps module for position values to go along with the signal values
I was concerned with noise from a relay so im opting for a double pole double throw mosfet configuration, Im trying to follow the switching from page 41 of https://bakernunn.org/ppm/wp-content/uploads/2014/05/ProtonPrecessionMagnetometers.pdf
I am open to suggestions it terms of smaller battery(12v), cheaper parts, different microcontroller, noise is important in this design so will need to use components with the least noise possible (finances permitting).
I started a KiCad schematic but found the difficulty increasing and wanted to seek help
Order flow is as follows;
-polarizing pulse which energizes the coil
-the proton precession signal is read from the coil
-flows through a pre-amp
-than through a 2500Hz sallen key low pass filter
-than through a 2100Hz sallen key high pass filter
-than back to the stm32F767 microcontroller for signal processing
entire board will eventually be attached to a drone, so will need some noise protection for the reading of coil which will be in microvolts, coil I have made which has 12.5 ohm resistance and 19 millihenry inductance
- board to be powered by a 4s lipo battery
- will also need onboard memory(sd card) to store values from the signal processing
- will also need a gps module for position values to go along with the signal values
I was concerned with noise from a relay so im opting for a double pole double throw mosfet configuration, Im trying to follow the switching from page 41 of https://bakernunn.org/ppm/wp-content/uploads/2014/05/ProtonPrecessionMagnetometers.pdf
I am open to suggestions it terms of smaller battery(12v), cheaper parts, different microcontroller, noise is important in this design so will need to use components with the least noise possible (finances permitting).
I started a KiCad schematic but found the difficulty increasing and wanted to seek help