Minimal-GPSDO
A GPSDO with superior performance using a few cheap components
** To download everything, MinGPSDO.zip **
The design criteria for this GPSDO (GPS disciplined oscillator) were:
● Output 10MHz accurate to better than ±0.01Hz (1 part per billion)
● Use low cost components (cheapest GPS module, etc.)
● Be self monitoring so the accuracy can be guaranteed without reference to a better standard
● Require no tuning by the user
● Give feedback to the user of the current status
● If it can be done in software, do it in software
The initial design consisted of a U-blox NEO-6M GPS receiver with active antenna, a PIC16F1455 microprocessor, a 74HC04 buffer powered by a 5V wall wart. ...