Page 3 - Scary Warning; DANGER
Scary Warning DANGER : BUILDING OR MODIFYING THIS KIT INVOLVES WORKING WITH DANGEROUS, POTENTIALLY LETHAL VOLTAGES. POWER LINE VOLTAGES ARE DANGEROUS. IF YOU ARE NOT EXPERIENCED WORKING WITH DANGEROUS, POTENTIALLY LETHAL VOLTAGES, RETURN THE KIT FOR A REFUND. IF YOU DO NOT ACCEPT FULL RESPONSIBILITY...
Page 4 - Overview; GPS Advantages and Disadvantages; the GPS 18 hardware should be; . The unit will work
Overview A man with a watch knows what time it is. A man with two watches is never sure. - Segal's Law This document describes how to connect a Garmin GPS 18 LVC to the IN-14 Nixie Tube Clock from tubeclock.com. The GPS unit will allow the clock to set and maintain time display to sub-millisecond ac...
Page 5 - will synchronize its second counter to this PPS signal.; Parts; The first rule to tinkering is to save all the parts.; Part Name
Once the PPS signal has begun, the GPS unit will continue sending one pulse per second until power is turned off, regardless of the satellite tracking state. The clock will synchronize its second counter to this PPS signal. In addition to setting the time on the first PPS signal, every morning at 2:...
Page 6 - How To Connect The GPS; Furious activity is no substitute for understanding.; Remove R1 and replace it with the 1 Watt, 100 Ohm part provided.
How To Connect The GPS Furious activity is no substitute for understanding. -H. H. Williams These instructions assume that you are adding the GPS upgrade to a completed IN-14 nixie clock kit purchased through tubeclock.com. If you are adding the upgrade at the same time as building the kit, you will...
Page 7 - Optional PPS Active Indicator; Remember that the GPS takes about five minutes to; decimal point you wish as the indicator.
3) Gently pry the old microcontroller from the socket, and insert the new PIC16F688. 4) Finally, the 12V DC power adapter will need to be replaced. WARNING: the 12V power adapter which shipped with the non-GPS kit is transformer based, and provides too high a Voltage for the GPS modified clock. The ...
Page 8 - Conclusion; A conclusion is the place where you got tired of thinking.
Conclusion A conclusion is the place where you got tired of thinking. - Harold Fricklestein When you power up the GPS modified clock, with the GPS plugged into it, it will at first appear and function as it did without the GPS. Set the time to within 15 minutes, and let the clock run. When the GPS a...
Page 9 - Update
Update The new revision of the the PCB has a place to put a header to mate with the connector which is already on the GPS unit. The surface mount header is shown in the picture below, and is now included with the GPS upgrade kit. Connecting to the thru-hole connection points as described in this man...