Suggested by a 1990 book for amateurs, this circuit makes use of an integrated component that is not common today. It converts signals from one band to signals in a 10.7 MHz band below.
Found in an Elektor from the 90s, this circuit must be powered by an isolated power source and also...
April 2017 - The ADXL35x line of Analog Devices accelerometers can now be obtained from Mouser...
The circuit shown, found in a 2004 documentation, allows the use of a telephone, without the...