Closed fz1nfx closed 5 years ago
This is a nice change to make the circuit smaller. Few things to notice: max operating voltage is 20V, vs 30V of lp2950cz. If running form bec, it should be no problem. I'm afraid programming with full circuit mounted (through J2 connector) will overload the PSOC outputs beyond specs. The antenna is in parallel with the programming serial lines. It should be disconnected for programming.
Programming through J2 connector is working OK (with full circuit mounted) Tests were done with:
There is one more change/option - 20MHz crystal. Of course, software needs to be changed.
With small crystal it is possible to reduce size of transponder to 15x15mm
Today I build transponder with integrated antenna and small crystal. Works fine.
Added contrib subfolder under transponder schematic