Difference between revisions of "GPS Frequency Standard"
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== Build V1 == | == Build V1 == | ||
| − | * [https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2334524.m570.l1313&_nkw=gps+module+neo-7M&_sacat=0&LH_TitleDesc=0&rt=nc&_odkw=gps+module+neo-7&_osacat=0&LH_PrefLoc=2 NEO-7M] | + | * [https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2334524.m570.l1313&_nkw=gps+module+neo-7M&_sacat=0&LH_TitleDesc=0&rt=nc&_odkw=gps+module+neo-7&_osacat=0&LH_PrefLoc=2 NEO-7M GPS] |
* [[FTDI-49MM]] card set to 3.3V levels | * [[FTDI-49MM]] card set to 3.3V levels | ||
* Frequency set using ublox software on PC | * Frequency set using ublox software on PC | ||
Revision as of 13:18, 23 June 2022
Contents
Build V2
- Stand-alone design does not require PC
- NEO-7M GPS
- Arduino in a Box card
- Arduino Pro Mini
- 3.3V, 8 MHz
- OLED Display
- Display lock status, set frequency
- Rotary Encoder Frequency Selection
- Flexible Input power
- On-board DC/DC buck regulator allows 7-23V input
- Direct 7-9V input (USE VRAW jumper)
- 3.3V or 5V Arduino support
- Measured 12 mA with 9V input and 3.3V Arduino Pro Mini
- Arduino Pro Mini
- PulseGen modified to receive input and drive 50 Ohm output
- Fits into Aluminum Project Box Enclosure DIY 100*76*35mm - ebay search
Build V1
- NEO-7M GPS
- FTDI-49MM card set to 3.3V levels
- Frequency set using ublox software on PC
- PulseGen modified to receive output from GPS and drive 50 Ohm output out of the box
- Fits into Aluminum Project Box Enclosure DIY 100*76*35mm - ebay search
GPS
- GPS Satellite Positioning Module NEO7M UBLOX Satellite Positioning 51 SCM STM32
- Specifications:
- Working Voltage: 3.3v-5.0v
- Color: As Picture Shown
- Description:
- With micro USB interface, you can debug GPS module with ordinary phone data cable, no longer need to use USB-TTL and other tools.
- TTL interface is reserved to facilitate the use of USB-TTL or external microcontroller to control and receive GPS information.
- Ceramic antenna on module board, no GPS external antenna can be used to search for stars.
- Reserved SMA antenna interface, can use external antenna, star search ability is stronger.
OLED Display
Description
- OLED display, no need backlight, self-illumination.
- The display performance is better than the traditional LCD display, also lower consumption.
Specifications
- Driver IC: SSD1306
- Size: 0.91 inch OLED
- Resolution: 128 x 32
- Size: 38 * 12 mm
- Number of pins: 4 Pin
- Interface Type: IIC interface
- Display Color: White
- Operating temperature:-40 ~ 85 ℃
I2C Pin Out
- GND: Power Ground
- VCC: Power + (DC 3.3 ~5v)
- SCL: Clock Line
- SDA: Data Line
Reference Materials
- Design & Build a GPS locked Frequency Standard- Scullcom
- SIMPLE 10 MHZ GPS FREQUENCY STANDARD AND RF GENERATOR
- uses Arduino Nano as FTDI replacement
- An Arduino-based GPS Disciplined Oscillator
- An Arduino Version of Brooks Shera's GPSDO
- Simulating the Brooks Shera (W5OJM) GPSDO Algorithm
Videos
