These circuits are generally very efficient, often running on a 9V battery for months because they remain in a low-power "waiting" state until a signal is detected [2, 4]. Practical Limitations
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
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: These circuits are generally very efficient, often running
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. The effectiveness depends heavily on the antenna length
Usually a single LED that flashes with each discharge.