zguy1243 said:
Can you post some more details on how to build it? Sounds like a neat project.
Thanks
I'd love to share how to build the lightning detector. I have drawn out a schematic, but I have no way to scan it and upload it as a jpg. I tried doing it with just a ascii (text), but it came out looking like crap.
If you have any suggestions on how to post the schematic, let me know. I'd be willing to try anything, so others can have the fun of building it.
By the way, besides an old AM radio, the only other parts are a diode, 4-resistors, 9-LED's of assorted colors, a LM3914 IC, and 1-capacitor.
The audio out of the radio is fed into pin 3 of the IC thru the diode. It also feeds into the cap, which charges for each lightning crash. This gives the LEDs a little time to stay on.
There is also a resistor across the cap that allows it to discharge so the LED's don't stay on all the time.
The rest if it is pretty basic. Do a google search for a LM3914N chip. That will give you a good idea on how to hook up the LED's and the 2-resistors that go to the chip.
Any other questions, just let me know.