Simple Storm Detector Circuit

Simple Storm Detector Circuit is like small weather magic in box, which can feel lightnings electric noise by showing the storm is coming near.

Also, this circuit uses one antenna to catch small signal in air like small radio, but signal being weak it uses amplifier to make signal strong.

Sometimes it also uses special filter to remove bad noise, so only storm signal is available; but at end circuit send signal to speaker which makes sound when lightning come and shows on screen as wave line.

So when one hears thunder sound far away, can check with this circuit if storm really coming or not.

Circuit Working:

Parts List:

Components	Values	Quantity
Resistors	100k 1/4 watt	2
	1.8k 1/4 watt	1
	600Ω 1/4 watt	1
Capacitors	Ceramic 10nF	1
	Ceramic 20nF	1
	Electrolytic 10µF 25V	1
	Electrolytic 100µF 25V	1
Semiconductors	Transistors BC547	2
	Antenna Square wooden frame coil wound with 220 turns, 85x85cm	1

To begin with, this storm detector circuit is easy to make as it has one sensitive amplifier and one antenna and both work together to find storm from far place.

Here, the antenna uses 220 turns of enamel-coated copper wire.

The wire goes around a wooden square frame with 85 cm sides and the wire size is not very important, as we can use 0.4 mm wire.

Furthermore, a capacitor connects across the wire ends and this combination lets the antenna operate at a frequency of 4 to 5 kHz.

Also, antenna connect to amplifier using two wires twisted together and the signal from this go to speaker or oscilloscope so one can hear or see storm signal.

Formulas:

When making storm detector circuit we must use electromagnetic signal to find things like lightning and thunder in sky.

Resonant Frequency:

To catch storm signal we have used resonance and amplifier in circuit.

Formula is:

f = 1 / 2π√(L * C)

where,

• L is coil inductance from wire on wooden frame antenna.
• C capacitor value connected with coil side by side.

Amplification Gain:

Transistor amplifier make weak signal strong and for that we have used the following formula:

Av = RC / re

where,

• RC is resistor on collector side.
• re is small inside resistance from transistor emitter.

Gain Av shows how much the circuit can amplify a weak storm signal.

Note:

These formulas help one start building storm detector, but one need to change values of parts little bit to make circuit work better and catch storm signal clearly.

How to Build:

To build a Simple Storm Detector Circuit we need to follow the below mentioned steps:

Prepare the Antenna:

• First, take enameled copper wire and turn it 220 times around square wooden frame and check the wire goes tight and even.

Add the Capacitor:

• Next, put one 20nF capacitor C4 with the two ends of the wire with parallel connection and this help antenna work in 4 to 5 kHz frequency; also one can try other values if needed.

Connect Antenna to Amplifier:

• Then use two wires twisted together to join antenna to amplifier input and make connection strong and cover well with tape or insulator.

Connect Amplifier Output:

• Join amplifier output to audio amplifier or oscilloscope, this will help one to hear or see storm signal.

Power the Circuit:

• Now give power to amplifier like it needs and then use good and steady power supply which is not too high or too low.

Test the Circuit:

• Turn ON the circuit and check what happen, if one uses oscilloscope see wave when storm is near and if one uses speaker hear sound when storm activity happen.

Make Adjustments:

• Try changing capacitor value or antenna a bit to make signal stronger and also try different setups to get better result.

Use the Circuit:

• When it works good one can use it to watch storm from far and just look or listen to the output to know if storm is coming close.

Note:

• Be careful when working with electricity and check all wire joints are safe and covered to stop any accident or damage.

Conclusion:

To conclude, Simple Storm Detector Circuit is useful electronic tool, which uses antenna, amplifier and sometimes tuning circuit to catch electromagnetic signals from storm.

Finally, it gives early warning when storm is coming and this is good for people who like weather or do research on it.