Building A Device To Map Magnetic Fields
A new device has been developed to map magnetic fields using an ESP32 microcontroller and an Arduino Nano. It features a 4.3" touchscreen LCD and utilizes EMS100 Fluxgate magnetic sensors for data collection. The device visualizes scan results as heatmaps and allows for data export to an SD card for further analysis.
- ▪The device is built with an ESP32 microcontroller and an Arduino Nano.
- ▪It uses EMS100 Fluxgate magnetic sensors to detect magnetic fields.
- ▪Scan results are displayed on a touchscreen and can be exported for later analysis.
Opening excerpt (first ~120 words) tap to expand
Building A Device To Map Magnetic Fields No comments by: Zoe Skyforest May 19, 2026 Title: Copy Short Link: Copy Magnetic fields are all around us. We can’t really feel or see them ourselves, per se, but we can map them with the right hardware, like this device built by [edosari50]. The build uses an ESP32 microcontroller, which is built on to a board with an integrated 4.3″ touchscreen LCD. It’s paired with an Arduino Nano, which does the work of actually talking to a pair of EMS100 Fluxgate magnetic sensors. The slower, less capable Arduino handles the low-level chatter and then passes the readouts to the ESP32 over a UART connection. Power is courtesy of a pair of 18650 lithium-ion cells, and a XL4005 DC-DC converter.
…
Excerpt limited to ~120 words for fair-use compliance. The full article is at Hackaday.
Discussion
0 commentsMore from Hackaday
