Because it is essentially a wide-band AM receiver, it lacks the sophisticated digital filtering found in professional detectors (like the AS3935 sensor), making it more of an educational tool than a precision safety device [4].
Most versions of this schema use a high-gain transistor stage (often a Darlington pair or multiple stages) to amplify the tiny signal picked up by a telescopic or wire antenna [3, 4]. While sensitive enough to detect strikes from tens of kilometers away, they are prone to "false positives" from household appliances, thermostats, or light switches [4]. shema indikatora grozy
It is critical to note that these devices do not protect against lightning; they only indicate its presence. If used with an outdoor antenna, proper grounding and lightning arrestors are mandatory to prevent the device itself from becoming a fire hazard. Verdict Because it is essentially a wide-band AM receiver,
The effectiveness depends heavily on the antenna length. A longer wire increases range but also increases the likelihood of picking up industrial noise [3]. Indication Method: It is critical to note that these devices
The circuit typically functions as a simple radio receiver tuned to very low frequencies (around 10–100 kHz), where lightning discharge energy is most concentrated [3]. Instead of playing audio, it triggers a visual or audible alert when it detects a surge.
