The telephone interface
We offer different compared to published in [1]. phone interface. It is designed to connect simplex radio station with the...
Radio 144 MHz
   Radio 144 MHz is used for operation in the Amateur radio band 144 MHz. This radio is narrowband frequency nodularia.
How to build Battery Equality Monitor Circuit Schematic - circuit diagram
DescriptionAlmost all 24V power systems in trucks, 4WDs, RVs, boats, etc, employ two series-connected 12V lead-acid batteries. The charging system...
Parametric Converter
In modern communication LW receivers often use an intermediate frequency of tens of megahertz (so-called "up conversion"). The advantage of...
A Bedside Lamp Timer Circuit Schematic
30 minutes operation, Blinking LED signals 6 last minutes before turn-offThe purpose of this circuit is to power a lamp...

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