I am many decades old, but still I love to dismantle electronic stuff once in a while. For a long time I have toyed with the idea to interface the Propeller with a radio clock receiver. Finally the clock on the wall fell down and broke - minutes later I got it opened and found the (DCF77) receiver unit which is connected to the clockwork electronics. 5 wires connect the two, named VDD, RF, GND, AGC, PON. I am guessing Voltage, Time signal, Ground, Automatic Gain Control, Power on. Regards the latter, these clocks run on a single AA, so the receiver is only switched on once in a while. Why AGC is brought out I have no idea. AGC could also mean something different.
Next step would be to disconnect the clockwork, feed 1.4V VDD to the receiver, hook up a scope to the RF, and see what happens when PON is tied to +
Anyone done this before me?