Amateur radio circuits

Three-level voltage indicator on LEDs scheme — the name is very frightening not experienced radio amateur, but nevertheless “the devil is not as bad as it is drawn”. You can learn how to quickly and easily assemble an elementary voltage indicator by reading our article. LED indicator: It should be noted that this is a …

A beginner amateur radio operator simply cannot do without at least a simple power supply. When developing or customizing a device, a regulated power supply is an indispensable attribute. But if you are a beginner amateur radio enthusiast and can not afford an expensive tricked-out power supply, then this article will help you fill your …

Many amateur radio designs use fuses or self-resetting fuses as fuses. In order to quickly and easily detect the failure of your fuse (protection tripping) you can use the fuse blown indication circuit, which is described in our article. A circuit where the indicator is an LED with three legs: The considered circuit of the …

It is quite natural that both a beginner and an experienced amateur radio operator face the problem of lack of a power supply. In the most primitive case, this problem can be solved by using a circuit with a quenching capacitor. In our article we consider the use of a reactive resistor to obtain the …

This article presents an elementary circuit of a capacitance meter on a logic chip. Such a classic and elementary circuit solution can be reproduced quickly and easily enough. Therefore, this article will be useful for a beginner amateur radio operator who wants to build an elementary capacitor capacitance meter. Operation of a capacitance meter circuit: …