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PIC16F628A-I/P programmed for the GPS Frequency Reference [GPSFrqRfv3.HEX or GPSFrqRfv4.HEX] PIC16F628A-I/P 8-bit microcontroller programmed with the firmware for the GPS Frequency Reference. V3 is for GPS modules that have a 4800 baud rate NMEA data stream. V4 is for the newer V.KEL GPS modules that have a 9600 baud rate NMEA data stream. Software version: v3 (4800 baud) v4 (9600 baud) Cat No SC1165. Price: AUD $10.00 1  Add to trolley In stock: yes (11 available). Estimated dispatch time: 1-3 days Related to: Project: GPS-Based Frequency Reference; Pt.1 (March 2007 [print issue] [online issue]) Project: GPS-Based Frequency Reference; Pt.2 (April 2007 [print issue] [online issue]) Project: GPS-Based Frequency Reference: Circuit Modifications (May 2007 [print issue] [online issue]) Project: Improving The GPS-Based Frequency Reference (September 2011 [print issue] [online issue]) Project: Improving The GPS-Based Frequency Reference (September 2011 [print issue] [online issue]) Other items relevant to these projects: GPS-Based Frequency Reference: PIC16F628A firmware for the GPS-Based Frequency Reference (v3 & v4) (Free) Add to trolley Updated PCB pattern for the GPS-Based Frequency Reference (PDF download) [04103073] (Free) Add to trolley Display PCB pattern for the GPS-Based Frequency Reference (PDF download) [04103072] (Free) Add to trolley GPS-based Frequency Reference front and rear panel artwork (PDF download) (Free) Add to trolley Improving The GPS-Based Frequency Reference: GPS Frequency Reference Display PCB [04103072] ($15.00) Add to trolley Revised GPS-Based Frequency Reference PCB [04103073] ($20.00) Add to trolley Revised circuit diagram and PCB overlay for the GPS-Based Frequency Reference (Free) Add to trolley