When IRQ goes back to logic zero there is a pause of at least 2 ms before the registry is read again. This is handled by a sketch which code is reported in List 1. The project shows how to read data detected by the breakout board, particularly when a possible storm is detected by showing the notification on a serial LCD display. Normally, the storm notification is displayed along with the number of detections in less than 60 seconds.
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Where not specified differently, design files and source code are instead provided according to a Creative Commons Attribution-ShareAlike 4. Privacy Policy. By Boris Landoni on June 8, Tweet Pin It. Pin It. Arduino breakout breakout board fishino homefeatured lighting lightingdetector newsline storm. Skilled in the GSM field, embraces the Open Source philosophy and its projects are available to the community.
Related Posts Bird Sound Classifier. Bird Sound Classifier. Large area CNC router. Leave a Reply Cancel reply Your email address will not be published. Actually, I'm using a 1. I have lots of them and I'm sure I'll need to replace it fairly often.
Below is a close-up with the sensitivity adjustment option and an incandescent bulb. The construction technique was chosen to make it easy to follow the wiring. Normally, the leads would be stuck through the holes and wired on the other side of the perf board. I used the perf board simply as a guide for copper nails driven into a pine board - strictly to make it easy to see all the connections. The perf board serves no purpose beyond visibility, so one could also use nails and wood for the assembly.
The copper nails from the home improvement store really solder easily, by the way. The image below is with an LED and no pot but with the k resistor added. I made several image edits for clarity and to correct mistakes; they're not perfect but I think the connections are clear. Ignore the diode to the left of the 27k resistor; it has been removed from the schematic.
Here's a version I built into a "fake" book I found at an art store. The copper PCB is connected to the circuit ground to act as a counterpoise for the antenna, increasing sensitivity. The lightning bolt was cut with a sharp knife then filled with blue-dyed epoxy. The antenna connects to the pin jack. I used a cheap flashlight head for the LED - I used too much blue dye in the epoxy so I need a bright flash! Note: The magnetic versions are more sensitive to distant lightning but they are fairly dead to piezo lighter impulses - those lighters don't emit much energy at 5 kHz the way a lightning bolt does.
Same goes for my "lightning simulator. Just tune in a station and hold the speaker near the end of the coil. With minor modifications it's possible to replace the telescoping antenna with a solenoid type inductor. One could use a ferrite loopstick operating at radio frequency but I've decided to tune this antenna to about 5 kHz. The resonant tank rolls off high-frequency noise and the circuit rejects lower frequency line-related hum. The lightning impulses ring this tank like a bell, easily seen on the collector of the darlington with an oscilloscope.
The 1 Henry inductor and 1 nF capacitor resonate near 5 kHz. Choose a value of capacitor that resonated your inductor around 5 kHz not particularly critical.
The inductor needs to be a straight solenoid type with no magnetic shielding on the ends. My prototype's inductor is from the high-voltage generator in an old CDV radiation survey meter. The inductance should be between about 50 mH and 1 H. Typical inductors are shown below:. Bobbins from power transformers may also work but the core must be removed and optionally replaced by a ferrite rod or audio transformer laminated iron only a straight "solenoid" core so that the external field gets in.
The black coil above is from an industrial solenoid and the large 33 Amadon core brings the inductance up to nearly 1 Henry. I'm using the tiny one on the bottom right with good results. The pretty beige coil an eBay find measures about 50 mH. Use a good quality film or NPO ceramic capacitor to resonate your inductor. You can't use toroids, pot cores, or other cores that close the magnetic path back around the coil. You can probably use a relay coil if you remove all the metal pieces.
Hook your prospective coil to a high-gain audio amplifier and if you hear distant lightning crackles you probably have a good candidate assuming a storm is within a hundred miles or so. When indoors loud AC hum is another indication that the coil might be suitable. Hook the inductor and capacitor in parallel across your scope and apply a signal through a 1 megohm resistor with an audio generator to see the resonance. Or use the lightning simulator and observe the frequency of the ringing on the collector of the darlington practical with a digital oscilloscope.
I just looked at the ringing caused by nearby lightning. Here's another version that replaces the darlington transistor with a compound transistor consisting of a PNP and NPN transistor. This change allows the use of the venerable CA transistor array. Ordinary small-signal transistors may also be used. Since the CA is pretty ancient I decided to use "period" parts for the rest of the components:. Weighing about a pound and measuring 5. It is made of rugged ABS plastic, so it should be able to withstand the usual bumps and drops.
It is also water-resistant. This lightning detector does not have the farthest range as it can only detect lightning strikes within 25 miles. But it is quite accurate in detecting incoming lightning thanks to its advanced false disturber rejection technology. It will notify users of lightning and storm through audible alerts, vibrating alarms, and warning lights. It also has a large colored LCD that provides updated information on storm status.
Powered by two AA batteries, the unit boasts of long operating hours. This is not the cheapest lightning detector on this list, but its price is justified with the numerous functions it has.
This product from INO is practically a compact weather station with seven functions, including lightning detection. It can determine lightning strikes up to 40 miles away, giving users enough time to seek shelter. It is a portable device with measurements of 7 x 6. It comes with a wrist strap that you can fasten it to your belt or bag. The Weather Pro uses lithium polymer batteries which can last up to 17 hours of operation. The batteries are also rechargeable. Apart from lightning detection, this device can also tell you the temperature, heat index, and atmospheric pressure.
It also provides humidity and altitude readings. All those details can be seen on an easy-to-use touchscreen display. Rugged and weather-resistant, this lightning detector can withstand the most punishing outdoor conditions. This is a 5-in-1 weather station that not only detects lightning strikes but also makes weather forecasts and displays indoor temperature and humidity levels, among others.
This is a smart system that you will love to have at home. The lightning detection function of the Pro Weather Station from Acurite has a maximum range of 25 miles. Once it detects lightning strikes, it sends an audible alarm to notify you. Data is transmitted every 8 seconds whenever the system detects lightning strikes. The system is also capable of detecting other weather conditions such as wind speed and direction, rainfall data, temperature, and humidity levels.
Those details are displayed on the FTF screen. You can toggle between various data easily with the different buttons of the screen. This system includes a couple of solar panels, an internal aspirating fan, and mounting brackets. Rounding out our list is this lightning detector sensor from Acurite.
It can work as a standalone lightning detector or as an accessory to a compatible weather station model from AcuRite, including models and As a standalone lightning detector, it flashes intermittently whenever it detects lightning strikes within a mile radius.
It will not, however, tell you how far the lightning is or whether you have to flee to a safe place. You may get more information out of it if you use it with any of the five weather station models from AcuRite.
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