Since the idea is to have something interesting in the way of mechanical movement and flashing lights, a second circuit to drive these events is needed.
The 555 timer at the bottom of the board is a one-shot timer, taking its input from the second pole of the Double Pole Double Throw (DPDT) relay on the left. It controls the second relay which will eventually control the interesting (I hope) stuff that will happen.
Sunday, April 12, 2009
Subscribe to:
Post Comments (Atom)
New Project Hallicrafters SX-101A Communications Receiver Saw this for sale on ebay and just could not resist. This is one of ham radio rece...
-
New Project Hallicrafters SX-101A Communications Receiver Saw this for sale on ebay and just could not resist. This is one of ham radio rece...
-
I’ve been thinking for a while that I would like to build a more sophisticated ham band receiver. To date, I’ve been making regenerative rec...
-
Wandering the intertubes, I found a website by Dave Richards (AA7EE), a ham radio enthusiast, who has built a number of amazing shortwave ra...
No comments:
Post a Comment