The PW International Beacon Project
Electronic Timer

Published in Practical Wireless, December 2001 (part 1) and January 2002 (part 2).

Goofs

Despite heroic efforts, there are a couple of items of information missing.
On page 34 of the January 2002 issue, Fig. 3 - the reset generator circuit (WS1734) - is missing the following:

• The wire connected to pin 3 of IC4A should be labelled Vdd. Similarly, the wire connected to pin 13 of IC4B should also be labelled Vdd.
• On IC4B the connections to the chip labelled Vss and Vdd do not have pin numbers marked. They are:
  Vss = pin 8    Vdd = pin 16

Details of the International Beacon Project can be found on the Northern California DX Foundation beacon page.

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