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Firmware for the 2.5GHz 12-Digit Frequency Counter project [0411112C.HEX]
HEX file and ASM source code to suit the PIC16F877A in the High-Resolution Frequency Counter.
This is a revised version of the firmware which has improved accuracy when measuring low-frequency signals and improved front-panel button debouncing.
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VK2828U7G5LF TTL GPS/GLONASS/GALILEO module with antenna and cable
A VK2828U7G5LF GPS module from GMOUSE. Data sheet is available at https://github.com/CainZ/V.KEL-GPS/blob/master/VK2828U7G5LF%20Data%20Sheet%2020150902.pdf
Features onboard ceramic patch antenna. Basic specifications are:
- 28 x 28 x 8.6mm
- 3.3-5V supply at 25-35mA
- TTL signalling, default 9600 baud
- Enable input, 1PPS output plus serial TX & RX with NMEA 0183
- Tracking sensitivity -162dBm, capture sensitivity -160dBm
- Cold start 26 seconds, hot start one second
- 1-10Hz updates
A short 6-way cable with plug is supplied. If you order this, you may receive a VK2828U8G5LF which is an updated version of the module with slightly better specifications but provides the same functions.
| Cat No SC3362. Price: AUD $25.00 1 |
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In stock:  yes (12 available). Estimated dispatch time: 1-3 days | Related to:
- Project: A GPS-Synchronised Clock (March 2009 [print issue] [online issue])
- Project: A GPS-Synchronised Clock (March 2009 [print issue] [online issue])
- Project: Dead-Accurate 6-Digit GPS-Locked Clock, Pt.1 (May 2009 [print issue] [online issue])
- Project: GPS Driver Module For The 6-Digit Clock, Pt.2 (June 2009 [print issue] [online issue])
- Project: GPS Synchronisation For Clocks With Sweep Hands (November 2009 [print issue] [online issue])
- Project: GPS Synchronisation For Clocks With Sweep Hands (November 2009 [print issue] [online issue])
- Project: A Multi-Function GPS Car Computer, Pt.1 (January 2010 [print issue] [online issue])
- Project: A Multi-Function GPS Car Computer, Pt.2 (February 2010 [print issue] [online issue])
- Project: Build A GPS Boat Computer (October 2010 [print issue] [online issue])
- Project: A 2.5GHz 12-digit Frequency Counter, Pt.1 (December 2012 [online issue])
- Project: A 2.5GHz 12-Digit Frequency Counter, Pt.2 (January 2013 [print issue] [online issue])
- Project: Accurate GPS 1pps Timebase For Frequency Counters (February 2013 [online issue])
- Project: Deluxe GPS 1pps Timebase For Frequency Counters (April 2013 [print issue] [online issue])
- Project: Build A GPS Tracker & Record Your Journeys (November 2013 [print issue] [online issue])
- Project: L-o-o-o-n-g Gating Times For The 12-Digit Counter (July 2014 [print issue] [online issue])
- Project: 6-Digit Retro Nixie Clock Mk.2, Pt.1 (February 2015 [print issue] [online issue])
- Project: 6-Digit Retro Nixie Clock Mk.2, Pt.2 (March 2015 [print issue] [online issue])
- Project: High Visibility 6-Digit LED GPS Clock (December 2015 [print issue] [online issue])
- Project: High Visibility 6-Digit LED GPS Clock, Pt.2 (January 2016 [print issue] [online issue])
- Project: Touch-Screen Boat Computer With GPS (April 2016 [print issue] [online issue])
- Project: Touchscreen Super Clock (July 2016 [print issue] [online issue])
- Project: GPS-synchronised Analog Clock Driver (February 2017 [print issue] [online issue])
- Circuit Notebook: Remote water level monitoring using LoRa and Arduino (July 2017 [print issue] [online issue])
- Project: An Arduino Data Logger with GPS (August 2017 [print issue] [online issue])
- Project: Arduino Data Logger Part 2 (September 2017 [print issue] [online issue])
- Feature: El Cheapo Modules Part 10: GPS receivers (October 2017 [print issue] [online issue])
- Project: Super Clock now shows your electricity tariff (July 2018 [print issue] [online issue])
- Project: GPS-synched Frequency Reference Pt.1 (October 2018 [print issue] [online issue])
- Project: GPS-synched, lab-quality frequency reference (Part 2) (November 2018 [print issue] [online issue])
- Project: Very accurate speedo, car clock & auto volume change (June 2019 [print issue] [online issue])
- Project: Advanced GPS Computer - Part 1 (June 2021 [print issue] [online issue])
- Project: Advanced GPS Computer – Part 2 (July 2021 [print issue] [online issue])
- Project: New GPS-Synchronised Analog Clock (September 2022 [print issue] [online issue])
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| View 117 other items relevant to the same project(s) |
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2.5GHz 12-Digit Frequency Counter Main PCB [04111121]
Main PCB for the High-Resolution 2.5GHz 12-Digit Frequency Counter project.
(May also be referred to as a Frequency Meter).
Double-sided PCB with plated through holes, solder mask and silkscreen overlay.
225 x 174mm.
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2.5GHz 12-Digit Frequency Counter Display PCB [04111122]
Display PCB for the High-Resolution 2.5GHz 12-Digit Frequency Counter project.
(May also be referred to as a Frequency Meter).
Double-sided PCB with plated through holes, solder mask and silkscreen overlay.
200 x 50mm.
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2.5GHz 12-Digit Frequency Counter Add-on PCB [04106141a/b]
Long Gating Times add-on board for the High-Resolution 2.5GHz 12-Digit Frequency Counter project.
(May also be referred to as a Frequency Meter).
Double-sided PCB with plated through holes, solder mask and silkscreen overlay.
169 x 44.5mm. Designed to be snapped or cut apart into two sections.
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PIC16F877A-I/P programmed for the 2.5GHz 12-Digit Frequency Counter [0411112C.HEX]
A PIC16F877A 8-bit microcontroller programmed for the High-Resolution Frequency Counter [0411112C.HEX].
This is a revised version of the firmware which has improved accuracy when measuring low-frequency signals and improved front panel button debouncing, as per Circuit Notebook May 2015.
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2.5GHz 12-Digit Frequency Counter Main PCB pattern (PDF download) [04111121]
PDF with the main PCB design for the 2.5GHz High-Resolution Frequency Counter (double-sided).
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2.5GHz 12-Digit Frequency Counter Display PCB pattern (PDF download) [04111122]
PDF with the display PCB design for the 2.5GHz High-Resolution Frequency Counter (double-sided).
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Long Gating Time Add-on Module for the 2.5GHz 12-Digit Frequency Counter PCB pattern (PDF download) [04106141a/b]
PDF with the PCB designs for the add-on to the 2.5GHz High-Resolution Frequency Counter (single-sided).
Both PCBs are in the same file and are designed to be etched together and then cut apart.
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2.5GHz 12-Digit Frequency Counter front and rear panel artwork (PDF download) [04111123]
PDF with artwork for the front and rear panels of the High-Resolution Frequency Counter unit.
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2.5GHz 12-Digit Frequency Counter front panel [04111123]
Front panel for the High-Resolution 2.5GHz 12-Digit Frequency Counter project.
(May also be referred to as a Frequency Meter).
Made from PCB material with a black solder mask and white silkscreen printing. Large rectangular cut-out for LED display and holes for LEDs, buttons and mounting screws are pre-made (routed/drilled).
Note that you may need to enlarge the holes for the power switch and input connectors, which can be done easily with a tapered reamer.
248 x 75mm, 2mm thick.
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