A Low Cost Sidereal Clock

Introduction : Overview : Accuracy

Circuit

The circuit consists of 3 major components and a few interface components. The major components are:

A search on the Internet using the descriptions will find many sellers of the major components. The 2N7000 FETs interface the 3.3V signals from the GPS to the 5V level required by the microprocessor.

The GPS module does not conveniently provide 1ppS and 3.3V, these require soldering wires to the module directly. This is described below

Note the circuit is not identical to that in the November 2015 issue of Silicon Chip. There are less components due to a software change.

Additional features

Solder points on the GPS module