doegox
LCD-based Arduino EMF detector
Based on Aaron's detector, here using a 2x16 LCD, actually my Samsung 16T202DA1J VFD (Vacuum Fluorescent Display).
Upper row gives the averaged value on 10 samples
Lower row gives the signal between the minimal and maximal values observed within those 10 samples.
It's also a good example of a smooth bargraph on a LCD, with custom "chars" if needed, i.e. when both min and max are to be shown on a single 5x7 digit display.
Explanations and code are available here
See also the video on next page
Note: why this plastic bag around the VFD? VFDs are using high voltage so it's safer to manipulate it this way.
LCD-based Arduino EMF detector
Based on Aaron's detector, here using a 2x16 LCD, actually my Samsung 16T202DA1J VFD (Vacuum Fluorescent Display).
Upper row gives the averaged value on 10 samples
Lower row gives the signal between the minimal and maximal values observed within those 10 samples.
It's also a good example of a smooth bargraph on a LCD, with custom "chars" if needed, i.e. when both min and max are to be shown on a single 5x7 digit display.
Explanations and code are available here
See also the video on next page
Note: why this plastic bag around the VFD? VFDs are using high voltage so it's safer to manipulate it this way.