Posted on 17 May 2008
This project came about because of a need to accurately calibrate the piles of HP test equipment I have been buying off ebay. This project uses a 10mhz voltage tuned crystal oscillator whose frequency is locked to the GPS positioning system clock. The GPS I used was a Canadian Marconi (CMC) Superstar single board OEM GPS receiver with a Motorola external amplified GPS antenna. The ovenized crystal oscillator is a modified Anritsu MH4100A standard crystal oscillator. [more]
Posted on 11 May 2008
The circuit it’self is pretty simple, take in the data on one pin, parse it, format it and then display it to a 4×20 LCD module (Hitachi Chipset). That is the basic idea, but you might add in somthing like a mechanical encoder that would allow for changing options or changing settings in the display unit. This might be as simple as a SPDT (Singe Pole Double Throw) switch if the options are as simple as two settings.[more]
Posted on 02 Apr 2008
WXtoImg is a fully automated APT and WEFAX weather satellite (wxsat) decoder. The software supports recording, decoding, editing, and viewing on all versions of Windows, Linux, and MacOS X. WXtoImg supports real-time decoding, map overlays, advanced colour enhancements, 3-D images, animations, multi-pass images, projection transformation (e.g. Mercator), text overlays, automated web page creation, temperature display, GPS interfacing, and control for many weather satellite receivers, communications receivers, and scanners.[more]
Posted on 05 Feb 2008
handheld GPS unit, that comes with a serial cable allowing you to interface it with a PC. Using a terminal program like Windows’ Hyperterminal or DOS’ Lynx, one can directly access the GPS to view the incoming geospatial message received from satellites orbiting Earth. Among other parameters, the message describes the unit’s position (longitude and latitude) and speed (if carried or transported in a vehicle). Using a terminal program to read the geospatial message isn’t very practical. The messages scroll too quickly to read well and they contain a lot of extraneous information.[more]
