Found in American documentation from the 1990s, this circuit uses coils with multiple outlets to get the best reception, the diode is a general-purpose crystal diode.
This circuit was found in Intersil's 1992 documentation consisting of a test for ADc0801 and...
When the phone rings, a high-powered incandescent light comes on. This circuit can be interesting to...
This configuration with CMOS 4011 integrated circuit generates sine signals in a frequency range...