Difference between revisions of "GPS Frequency Standard"
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* [https://k6jca.blogspot.com/2019/02/an-arduino-version-of-brooks-sheras.html An Arduino Version of Brooks Shera's GPSDO] | * [https://k6jca.blogspot.com/2019/02/an-arduino-version-of-brooks-sheras.html An Arduino Version of Brooks Shera's GPSDO] | ||
* [https://k6jca.blogspot.com/2018/12/simulating-brooks-shera-w5ojm-gpsdo.html Simulating the Brooks Shera (W5OJM) GPSDO Algorithm] | * [https://k6jca.blogspot.com/2018/12/simulating-brooks-shera-w5ojm-gpsdo.html Simulating the Brooks Shera (W5OJM) GPSDO Algorithm] | ||
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| + | === Videos === | ||
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| + | <video type="youtube">lbns-FvpzK4</video> | ||
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| + | <video type="youtube">_PEXSXUqXYQ</video> | ||
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| + | <video type="youtube">zZ6tc_ROdfU</video> | ||
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| + | <video type="youtube">QUiVZFkBh8k</video> | ||
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| + | <video type="youtube">M6SmdqMA-Dg</video> | ||
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| + | <video type="youtube">LYowlnUTOIs</video> | ||
Revision as of 12:59, 23 June 2022
Contents
Hardware V2
- 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
Hardware 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
Enclosure X1
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
