Difference between revisions of "GPS Frequency Standard"

Revision as of 15:54, 26 June 2022

Stand-alone design does not require PC
NEO-7M GPS
QTPy49 card
- QT Py (SAMD based)
- Running CircuitPython
- 3.3V, 40 MHz
PulseGen modified to receive input from GPS output and drive 50 Ohm output on BNC
Fits into Aluminum Project Box Enclosure DIY 100*76*35mm - ebay search

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 Satellite Positioning Module NEO7M UBLOX
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, no need backlight, self-illumination.
The display performance is better than the traditional LCD display, also lower consumption.

@@ Line 4: / Line 4: @@
 * [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]
 * [[QTPy49]] card
-** SAMD CPU
+** [[QT Py (SAMD based)]]
 ** Running CircuitPython
 ** 3.3V, 40 MHz
-** OLED Display
+* [[PulseGen]] modified to receive input from GPS output and drive 50 Ohm output on BNC
-*** 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
-** BNC connectors on-board
-* [[PulseGen]] modified to receive input from GPS output and drive 50 Ohm output
 * Fits into Aluminum Project Box Enclosure DIY 100*76*35mm - [https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2334524.m570.l1313&_nkw=100*76*35mm+aluminum&_sacat=0&LH_TitleDesc=0&_odkw=100*76*35mm+Aluminum+PCB+Instrument+Box+Enclosure+Electronic+Project+Case+Set&_id=174408274566 ebay search]