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index 6bf86b4..6dce7a5 100644 --- a/README.md +++ b/README.md @@ -39,6 +39,8 @@ In this current configuration: +# PCB +Use V2 rev B. V3 has not been tested/built. it is still in design phase. Perhaps it should just be in a separate brach of Github. Designed in KiCAD v6. # Operating Principle This circuit uses the "auto-balancing bridge" technique. If you are curious/want to play around with the circuit you can see the LTSPICE schematic. @@ -155,6 +157,15 @@ This is a frequency sweep of a solenoid (~1 mm diameter) wound on a copper tube ![](NotchFiltSweep.png) +# Thoughts for improvement +* Make the shunt resistor digitally selectable +* Build a microcontroller-based interface for increased portability +* Improve system accuracy for high impedance loads +* Improve system accuracy for high frequencies +* Modify it such that it uses only one amplifier for both VMon and IMon and a relay to select which one. +* Replace INA121 with a JFET INA (e.g. 3 opamp configuration) +* Implement transformer test jig +